Answer:
building one is 292 years old and building two is 879 years old
Step-by-step explanation:
292x3= 879
The newer building is 73 years old,
And, The older building is 219 years old.
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The total age of the buildings is 292 years.
Now,
Let the newer building is = x years old,
Then, The older building is = 3x years old.
Here, The total age of the buildings is 292 years.
So, We get;
⇒ x + 3x = 292
⇒ 4x = 292
⇒ x = 73
Thus, The newer building = x years old,
= 73 years old
And, The older building = 3x years old.
= 3 × 73
= 219 years old
Therefore, The newer building is 73 years old,
And, The older building is 219 years old.
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What’s the correct answer for this?
Answer:
0.7 + 0.4 - 0.2 = 0.9
Step-by-step explanation:
Let's denote the probabilities as following:
The probability that the show had animals is
P(A) = 0.7
The probability that the show aired more than 10 times is
P(B) = 0.4
The probability that the show had animals and aired more than 10 times is
P(A⋂B) = 0.2
The probability that a randomly selected show had animals or aired more than 10 times is P(A⋃B)
The correct form of addition rule to determine the probability that a randomly selected show had animals or aired more than 10 times is:
P(A⋃B) = P(A) + P(B) - P(A⋂B) = 0.7 + 0.4 - 0.2 = 0.9
=> Option B is correct
Hope this helps!
Suppose the number of defects in a sweater from a population of sweaters produced from a textile factory are normally distributed with an unknown population mean and a population standard deviation of 0.06 defects. A random sample of sweaters from the population produces a sample mean of x¯=1.3 defects. What value of z should be used to calculate a confidence interval with a 95% confidence level? z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576
Answer:
Z = 1.96.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1-0.95}{2} = 0.025[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1-\alpha[/tex].
So it is z with a pvalue of [tex]1-0.025 = 0.975[/tex], so [tex]z = 1.96[/tex]
The value of z that should be used is Z = 1.96.
The area of a parallelogram is 65 ft square. What is it height?
(The base is 13 ft)
Answer:
5
Step-by-step explanation:
Area equals bh
So 65 divided by 13
Answer:
h = 5 ft
Step-by-step explanation:
The area of a parallelogram is
A = bh
65 = 13h
Divide each side by 13
65/13 = 13h/13
5 = h
From a sample of 25 graduate students, the mean number of months of work experience prior to entering an MBA program was 33.59. The national standard deviation is known to be 19 months. What is a 90% confidence interval for the population mean?
Answer:
The 90% confidence interval for the population mean is between 27.34 months and 39.84 months.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1-0.9}{2} = 0.05[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1-\alpha[/tex].
So it is z with a pvalue of [tex]1-0.05 = 0.95[/tex], so [tex]z = 1.645[/tex]
Now, find the margin of error M as such
[tex]M = z*\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
[tex]M = 1.645*\frac{19}{\sqrt{25}} = 6.25[/tex]
The lower end of the interval is the sample mean subtracted by M. So it is 33.59 - 6.25 = 27.34 months
The upper end of the interval is the sample mean added to M. So it is 33.59 + 6.25 = 39.84 months
The 90% confidence interval for the population mean is between 27.34 months and 39.84 months.
Unit sales for new product ABC have varied in the first seven months of this year as follows: Month Jan Feb Mar Apr May Jun Jul Unit Sales 148 329 491 167 228 285 441 What is the interquartile range (IQR) of the data? Please specify your answer as an integer. Note: Use the following formula to find quartile locations: Lq=(n+1)⋅(q4) where q is the quartile index (e.g., q=1 for the first quartile) and n is the number of data points.
Answer:
IQR = 274
Step-by-step explanation:
Given the unit sales for the months as:
148, 329, 491, 167, 228, 285, 441
Let's rearrange in ascending the values in ascending order (from lowest to highest), we have:
148, 167, 228, 285, 329, 441, 491
Here the total number of data, n is 7
Let's find the quartile locations using the formula:
[tex] Lq = (n + 1) * (\frac{q}{4}) [/tex]
where q is quartile index.
For first quartile, Q1:
[tex] Lq = (7 + 1) * (\frac{1}{4}) [/tex]
[tex] Lq = 8 * (\frac{1}{4}) = 2 [/tex]
Thus, the 2nd observation in the data is 167.
Q1 = 167
For third quartile, Q3:
[tex] Lq = (7 + 1) * (\frac{3}{4}) [/tex]
[tex] Lq = 8 * (\frac{3}{4}) = 6 [/tex]
Thus, the 6th observation in the data is 441.
Q3 = 441
The interquartile range, IQR will be:
Q3 - Q1
= 441 - 167
= 274
IQR = 274
If the points (-1, 1), (3,-2), and (q,4) are collinear, the value of q is
Answer:
q = -5
Step-by-step explanation:
For A the midpoint between B and C, we have ...
A = (B+C)/2
C = 2A -B
Point A(-1, 1) is the midpoint* between C(q, 4) and B(3, -2), so the point (q, 4) will be ...
(q, 4) = 2A -B
(q, 4) = 2(-1, 1) -(3, -2) = (2(-1)-3), 1(1)+2)
(q, 4) = (-5, 4)
q = -5
_____
* We know A is the midpoint because we observe the differences in y-values for C-A and A-B are ... 4 -1 = 3, and 1 -(-2) = 3. That is, points C and B are the same distance from A.
35.76 and 35.8 and make the inequality 35.76<________<35.8 a true statement?
Corrected Question
Find a number in between 35.76 and 35.8 and make the inequality 35.76<________<35.8 a true statement?
Answer:
One example is 35.77
Step-by-step explanation:
Given the numbers 35.76 and 35.8
To make the inequality [tex]35.76< x <35.8[/tex] a true statement, we look for a value of x such that:
[tex]x>35.76; and\\x<35.8\\$Let x=35.77\\Cearly:$\\35.77 > 35.76;$ and$\\35.77<35.8[/tex]
Therefore:
[tex]35.76< 35.77 <35.8[/tex] is a true statement.
10.
1
(1 point)
Which graph represents the linear function y=-x-4?
3
Answer:
Step-by-step explanation:
here are some of the graph points:
(-2,-2)
(-1,-3)
(0,-4)
(1,-5)
(2,-6)
(3,-7)
(4,-8)
The graph should have a negative slope and the slope should be -1, and the y-intercept should be -4. The pic you put is not the correct graph.
Find the distance between the points (-5, 0) and (-4, 1).
Answer:
√2
Step-by-step explanation:
(-5, 0) and (-4, 1)
[tex]d=\sqrt{(x_{2}-x_{1} )^{2}+ {(y_{2}-y_{1} )^{2}}}[/tex]
[tex]d= \sqrt{(-4-(-5))^{2} + (1-0)^{2}} =\sqrt{1+1} =\sqrt{2}[/tex]
A plumber laying 500meters of drain pipe requires 20men working for 10days. What length in meters would be laid by 50men in 5days, if they all work at same rate?
Answer:
50men working in 5days will lay 100 meters
Step-by-step explanation:
If 20men working for 10days lays 500meters
then, 1 man will lay 10,000 meters in 10 days
also, 1 man will lay 1000 meters in 1 day
If 1 man lays 1000 meters in 1 day,
Then, 50 men will lay (1000 meters / 50 ); 20 meters in 1 day
also, the same 50 men will lay (20 meters x 5days); 100 meters in 5 days.
Therefore, 50men working in 5days will lay 100 meters
Do oddsmakers believe that teams who play at home will have home field advantage? Specifically, do oddsmakers give higher point spreads when the favored team plays home games as compared to when the favored team plays away games? Two samples were randomly selected from three complete National Football League seasons (1989, 1990, and 1991). The first sample consisted of 50 games, where the favored team played in a home game, while the second sample consisted of 50 games, where the favored team played in an away game. The oddsmakers’ point spreads (which are the number of points by which the favored team is predicted to beat the weaker team) were then collected. The following hypotheses were tested: H0: µ1 = µ2 Ha: μ1 > μ2 Analyses were run. The following is the (edited) output for the test: Which of the following is an appropriate conclusion based on the output?1. The data provide sufficient evidence to reject H0; thus, we can conclude that the mean point spread for home games is higher than that of away games.2. The data provide sufficient evidence reject the H0; thus, we cannot conclude that the mean point spread of home games is higher than that of away games.3. The data do not provide sufficient evidence to reject H0; thus, we cannot conclude that the mean point spread of home games is higher than that of away games.4. The data do not provide sufficient evidence reject the H0; thus, we can conclude that the mean point spread for home games is higher than that of away games.
Answer:
Option 3 is correct.
The data do not provide sufficient evidence to reject H0; thus, we cannot conclude that the mean point spread of home games is higher than that of away games.
Step-by-step explanation:
Before anything else, we first give the null and alternative hypothesis for this question.
Null hypothesis would be that there isn't significant evidence to conclude that the mean point spread of home games is higher than that of away games.
H0: µ1 = µ2
And the alternative hypothesis would be that there is significant evidence to conclude that the mean point spread of home games is higher than that of away games.
Ha: μ1 > μ2
The data from the output of the analysis of the hypothesis test is missing from the question. It was obtained online and is attached to this solution of the question.
The table consists of the difference, the sample mean, the standard error of the mean, degree of freedom, the test statistic and most importantly, the p-value. It is the p-value that absolutely gives us the concluding statement of the hypothesis testing.
When the significance level for a test isn't provided, the convention is usually to use 5% significance.
Interpretation of p-value
When the (p-value > significance level), we fail to reject the null hypothesis and when the (p-value < significance level), we reject the null hypothesis and accept the alternative hypothesis.
So, for this question, significance level = 0.05
p-value = 0.4351
0.4351 > 0.05
Hence,
p-value > significance level
This means that we fail to reject the null hypothesis & say that 'The data do not provide sufficient evidence to reject H0; thus, we cannot conclude that the mean point spread of home games is higher than that of away games'.
Hope this Helps!!!
What evidence from Tutankhamen's tomb supports the theory that he had a genetic disease that made it difficult for
him to walk? Check all that apply.
please help
Answer:
the first and the second answer
Step-by-step explanation:
Answer:
A and B
Step-by-step explanation:
This is correct believe me it is.
30 POINTS FOR THE GENUIS WHO CAN ANSWER THIS!!
Answer:
Answers are below in bold
Step-by-step explanation:
1) A = 1/2bh Use this equation to find the area of each triangular base
A = 1/2(8)(6) Multiply
A = 1/2(48) Multiply
A = 12cm² Area of each triangular base
2) A = L x W Use this equation to find the area of the bottom rectangular face
A = 20 x 8 Multiply
A = 160 cm² Area of the bottom rectangular face
3) A = L x W Use this equation to find the area of the back rectangular face
A = 20 x 6 Multiply
A = 120 cm² Area of the back rectangular face
4) A = L x W Use this equation to find the area of the sloped rectangular face
A = 20 x 10 Multiply
A = 200 cm² Area of the sloped rectangular face
5) To find the total surface area of the triangular prism, add together all of the numbers.
A = 12 + 12 + 160 + 120 + 200 Add
A = 504 cm² Total area of the triangular prism
Please help photo attached
Answer:
see below
Step-by-step explanation:
You can determine the correct function by looking at the function and graph values at x = 1.
For some constant k, the function is ...
(g·h)(x) = g(x)·h(x) = (-3^x)(kx) = -kx·3^x
For x=1, the graph shows (g·h)(1) = 6. Using this in our expression for (g·h)(x), we have ...
(g·h)(1) = 6
-k(1)(3^1) = 6 . . . . use the expression for (g·h), filling in x=1
k = -2 . . . . . . . . . divide by -3
The function h(x) is ...
h(x) = -2x
Factor completely. 640-10x^2
Answer:
10 (8-x)(8+x)
Step-by-step explanation:
640-10x^2
Factor out 10
10 (64 - x^2)
Notice that inside the parentheses is the difference of squares
10 ( 8^2 - x^2) and a^2 - b^2 = (a-b) (a+b)
10 (8-x)(8+x)
Answer:
10(8 - x)(8 + x)
Step-by-step explanation:
Given
640 - 10x^2
Solution
Take out 10 on each side of the minus sign
10(64 - x^2)
The expression in the brackets is a difference of squares which factors as
a^2 - b^2 = (a + b)(a - b)
Factor the expression inside the brackets as a difference of squares.
64 = 8*8
x^2 = x*x
10(8 - x)(8 + x)
Last week Malia spent $13,000 on advertising. This week, she plans to spend three times as much. Next week, she wants to spend 60% of what she spent the previous two weeks. How much should she plan to spend on advertising next week?
Answer:
31200 dollars
Step-by-step explanation:
you multiply 13 by 4, because its last week and this week, then find 60 percent of that. Proportion: x/52000=60/100. When solved, it is $31200
The solution is, $31200 should she plan to spend on advertising next week.
What is percentage?
A percentage is a number or ratio that can be expressed as a fraction of 100. A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%", although the abbreviations "pct.", "pct" and sometimes "pc" are also used. A percentage is a dimensionless number; it has no unit of measurement.
here, we have,
given that,
Last week Malia spent $13,000 on advertising.
This week, she plans to spend three times as much.
Next week, she wants to spend 60% of what she spent the previous two weeks.
now, we have,
you multiply 13000 by 4,
i.e. 13000 *4 = 52000
because its last week and this week,
then find 60 percent of that.
let, she plan to spend on advertising next week is x .
Proportion:
x/52000=60/100.
When solved, it is $31200.
Hence, The solution is, $31200 should she plan to spend on advertising next week.
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A=b.h,for h V=3k+2,for k
Answer:
see explanation
Step-by-step explanation:
Given
A = bh ( isolate h by dividing both sides by b )
[tex]\frac{A}{b}[/tex] = h
-----------------------------
Given
V = 3k + 2 ( subtract 2 from both sides )
V - 2 = 3k ( divide both sides by 3 )
[tex]\frac{V-2}{3}[/tex] = k
You launch a water balloon. The function h=-0.08t^2+1.6t+2 models the height h (in feet) of the water balloon after t seconds. What is the initial height of the balloon?
Answer:
The initial height of the balloon is 2 feet.
Step-by-step explanation:
The height of the balloon in feet after t seconds is given by the following equation:
[tex]h(t) = -0.08t^{2} + 1.6t + 2[/tex]
What is the initial height of the balloon?
This is h when t = 0, that is, h(0). So
[tex]h(0) = -0.08*0^{2} + 1.6*0 + 2 = 2[/tex]
The initial height of the balloon is 2 feet.
What’s the correct answer for this question?
Answer: choice D
Step-by-step explanation:
The question asks for the probability that the chose card is a king or a queen.
and we have 8 cards that are a either a king or a queen
so
8/52=2/13
or you can think of it in the additive way(most of the time addition is required when you have “or” and multiplication when you have “and”)
4/52+4/52=2/13
f(x)=6x-4 what is f(x)whence=8
Answer:
44
Step-by-step explanation:
Put 8 where x is and do the arithmetic.
f(8) = 6·8 -4 = 48 -4
f(8) = 44
help me please
i will give you 5 stars and brainliest
Answer:
228incubed
Step-by-step explanation:
Area of prism is area of cross section x length.
So, área of trapezium is a plus b times h divided by 2.
Times that by height. Gives you 228
What is the value of y
Answer:
B 63 degrees
Step-by-step explanation:
180 - 54 = 126
126 / 2 = 63
Please answer this correctly
Answer:
22 1/8 mm.
Step-by-step explanation:
First add the whole numbers, then the fractions:
3 + 5 + 5 + 7 = 20
7/8 + 7/8 + 3/16 + 3/16 Change the 7/8's to 14/16:
= 14/16 + 14/16 + 3/16 + 3/16
= 28/16 + 6 /16
= 34 /16
= 2 2/16
= 2 1/8
So the final answer is 20 + 2 1/8
= 22 1/8 mm.
Step-by-step explanation:
the perimeter of this
3 7/8 + 5 3/16 + 5 3/16 + 7 7/8
= 31/8 + 83/16 + 83/16 + 63/8
= 62 + 83 + 83 + 126/ 16
= 354/16 ans
Please slove for me would make my day
Answer:
x = 30°
Step-by-step explanation:
The sum of angles in a triangle is 180°, so you have ...
60° +2x +60° = 180°
2x = 60° . . . . . . . . .subtract 120° from both sides
x = 30° . . . . . . . . . . divide by 2
_____
Since the triangle is isosceles (base angles are congruent), the angle bisector is also an altitude that divides the triangle into congruent 30°-60°-90° triangles. The measure of the angle marked x is 30°.
The answer of this problem because I am currently having trouble with this topic and teach me how to solve it thanks!
i need help on this question
Answer:
1/2 or 0.5
Step-by-step explanation:
4x+8=10tothefirstpower x=1/2 or 0.5
Rectangle has a width 9 of units and a length of 40 unit is.what is the length of a diagonal?
Answer:
[tex]\boxed{\sf \ \ \ diagonal \ length \ = \ 41 \ \ \ }[/tex]
Step-by-step explanation:
Thanks to Pythagoras we can say that
l being the length of the diagonal
[tex]l =\sqrt{9^2+40^2}=\sqrt{81+1600}=\sqrt{1681}=41[/tex]
There are 15,000 students attending the community college. Find the percent of a students that attend classes in the evening if there are 3,750 evening students
Answer:
25% of students attend classes in the evening.
Step-by-step explanation:
The proportion of evening students is the number of evening students divided by the total number of students.
The percentage is the proportion multiplied by 100.
We have that:
In total, there are 15000 students.
3750 are evening students
3750/15000 = 0.25
0.25*100 = 25%
25% of students attend classes in the evening.
Y= 3x^2 + 12x + 7 in vertex form
Answer:
y=3(x+2)^2-5
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
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The College Board originally scaled SAT scores so that the scores for each section were approximately normally distributed with a mean of 500 and a standard deviation of 100. Assuming scores follow a bell-shaped distribution, use the empirical rule to find the percentage of students who scored less than 400. a. 84% b. 16%
Answer:
b. 16%
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 500
Standard deviation = 100
Percentage of students who scored less than 400:
400 = 500 - 1*100
So 400 is one standard deviation below the mean.
The normal distribution is symmetric, which means that 50% of the measures are below the mean and 50% are above.
Of those who are below, 68% are within 1 standard deviation of the mean, that is, between 400 and 500. So 100-68 = 32% are below 400.
0.5*0.32 = 0.16 = 16%
So the correct answer is:
b. 16%
