A hiker climbs down a mountain that is
84 ft above sea level. It took him 6
hours to make it back to sea level.
What was the average number of
feet that he descended each hour?
A. -78 ft
B. 90 ft
C.-504 ft
D. -14 ft
Answer:
D.
Step-by-step explanation:
0 - 84 / 6
= -14 ft / hour.
Answer: 84 divided by 6= 14ft
Step-by-step explanation:
Write an equation in slope intercept form of the line
Answer:
Step-by-step explanation: y=2x-3
y is -3
the slope is 2 so the answer is: y=2x-3
Answer:
y= 2x-3
Step-by-step explanation:
y= mx + b
m= 2 (rise over run/slope)
b= -3 (y-intercept)
-I hope this helps have a great day!
the product of a number and four
Graph the solution set for this nequality:
-6x – 3y S-18
Step 1: Identify the x-and y-intercepts of the boundary line.
When x = 0, y =
When y=0, x=
Answer: when x= 0,y= 6
when y= 0,x=3 AND the line type is solid !!
Step-by-step explanation:
The intercepts of the graph are (3, 0) and (0, 6) with the upper part of the graph shaded.
Inequality graphInequality are equations not separated by an equal sign. Given the inequality expression;
-6x - 3y ≤ -18
For the x-intercept: This is the point where the value of y is zero, hence;
-6x - 3(0) = -18
-6x = -18
x = 3
The x-intercept of the function is (3, 0)
For the y-intercept: This is the point where the value of x is zero, hence;
-6(0) - 3y = -18
-3y = -18
y = 6
The y-intercept of the function is (0, 6)
Next is to plot the inequality graph
Learn more on inequality graph here: https://brainly.com/question/11234618
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find the length of the third side to the nearest tenth
Answer:
The missing length is 5.3 (a=5.3)
Step-by-step explanation:
The a is the missing side length.
a(2)+6(2)=8(2) The twos will be small and at the right corner of the number/letter.
when there is a 2 at the right corner of a number you will multiply that number with itself.
6×6=36 8×8=64
subtract 36 by 36. subtract 36 by 64(28)
a(2)=28
if you have a scientific caculator there are these buttons you must use at the end. Click the 2nd button, the click the x2 button(close to bottom left)
once you have those buttons clicked add in the number that doesnt have a variable(28)
28=5.29
ROUND 5.29 PLEASE
5.29=5.3
a=5.3
Forty percent of students at a small college have brought their own personal computer to campus. A random sample of 120 entering freshmen was taken.
a. What is the standard error of the sample proportion bringing their own computer to campus.
b. What is the probability that the sample proportions is less than 0.33?
c. What is the probability that the sample proportion is between 0.38 and 0.46?
Answer: a. Standard Error = 0.045
b. P (p-hat<0.33) = 0.0606
c. P (0.38<p-hat<0.46) = 0.5782
Step-by-step explanation: The sample proportion is p-hat=0.4
a. Standard error of a sample proportion is calculated as:
[tex]SE=\sqrt{\frac{p(1-p)}{n} }[/tex]
with p=0.4 and n=120:
[tex]SE=\sqrt{\frac{0.4(1-0.4)}{120} }[/tex]
[tex]SE=\sqrt{0.002}[/tex]
SE = 0.045
The standard error of the sample proportion of students bringing their own computer is 0.045.
b. To determine the probability for sample proportions, first find the z-score:
P(p-hat < x) = [tex]P(z<\frac{x-\mu}{SE})[/tex]
[tex]P(p-hat<0.33)=P(z<\frac{0.33-0.4}{0.045} )[/tex]
P(p-hat < 0.33) = [tex]P(z<-1.55)[/tex]
Now, using z-score table, find the probability:
[tex]P(z<-1.55)[/tex] = 0.0606
Probability the sample proportion is less than 0.33 is 0.0606.
c. For probability between two proportions, find z-score for each number of the interval:
For p < 0.38:
P(p-hat < 0.38) = [tex]P(z<\frac{0.38-0.4}{0.045} )[/tex]
P(p-hat < 0.38) = [tex]P(z<-0.44)[/tex]
Using z-score table,
[tex]P(z<-0.44)[/tex] = 0.33
For p < 0.46:
P(p-hat < 0.46) = [tex]P(z<\frac{0.46-0.4}{0.045} )[/tex]
P(p-hat < 0.46) = P(z < 1.33)
Probability is
P(z < 1.33) = 0.9082
The probability of the interval is the difference of each probability:
P(0.38 < p-hat < 0.46) = [tex]P(z<1.33)-P(z<-0.44)[/tex]
P(0.38 < p-hat < 0.46) = [tex]0.9082-0.33[/tex]
P(0.38 < p-hat < 0.46) = 0.5782
Probability the sample proportion is between 0.38 and 0.46 is 0.5782.
What is x
135=-1+45x
Answer:
X = 3.02
Step-by-step explanation:
Answer:
x= 3.02
Step-by-step explanation:
135 = -1 + 45x
+1 +1
136/45= 45x/45
x = 3.02
What are the coordinates of point p on the directed line segment from r to q such that p is 5/6 the lenght of the line segment from r to q? Round to the nearest tenth, if necessary.
Answer:
(-3.5, 2.3)
Step-by-step explanation:
Correct on Edge2020
Please help thanks you
2 over 3 divided by 6
Answer:
1/9
Step-by-step explanation: This is because 2/3 then you divide by 6 to get 1/6.
Which algebraic expression represents 10 less than a number?
A) n + 10
B) 10 - n
C) n - 10
D) 10n
Answer:
b
Step-by-step explanation:
b
5/6 x 9/10 simplified
I have 3 dimes and a nickel what fraction of a dollar do i have
Answer:
35/100 or 7/20
Step-by-step explanation:
3dimes = 10 a nickel=5. 30+5 is 35 which is 35/100 or 7/20.
Hope this helps plz mark brainliest :D
Use the distributive property to write the next step in simplifying the equation.
Use the asterisk symbol (*) to represent multiplication.
-1(8 + x) = 7
Brett shaded 4/8 of a sheet of notebook paper. Aisha says he shaded 1/2 of the paper. Are the two fractions equivalent? if so, what is another equivalent fraction
Answer:
60
Step-by-step explanation:
48
12
60
-5m-3m+6-3 = -13 Need help
Answer: m=2
Step-by-step explanation:
-5m-3m+6-3=-13
-8m+3=-13
-3 -3
-8m/-8 = -16/-8
m=2
Mrs. Cole told Cameron that the score on his current quiz was 40% better than his previous. If Cameron had a score of 50 on his previous quiz, what is his current quiz score?
Answer:
70
Step-by-step explanation:
This may be 2 hours ago but at least I know what to do. You can just add 50 + 40%! 40% being .4 and 50 staying the same is in fact 70.
he got a 70.
What is the measure of DEF?
Answer:
105°Step-by-step explanation:
angle ∠DEF = 180 - 28 - 47
= 105°
Order the steps to solve -3x + 2.4 = 19.2.
1. Simplify to -3x=16.8
2. Divide both sides by -3
3. Simplify to x=-5.6
4. Subtract 2.4 from both sides
Quickly pls I’ll give brainliest
Answer:
1. Subtract 2.4 from both sides
2.Simplify to -3x=16.8
3.Divide both sides by -3
4. Simplify to x=-5.6
Which list of elements is arranged in order of increasing atomic number?
Sr, Ca, Mg, Be
F, Cl, Br, I
B, C, Li, Be
Sc, V, Ti, Cr
Answer:
B. F, Cl, Br, I
Step-by-step explanation:
The atomic nunbers are 9, 17, 35, 53
Have a good day!
What is the value of (h o k)(2)
Answer:
-3
Step-by-step explanation:
h(k(2)) = h(k(x=2)) = h(-2) = h(x= -2)= 3/( -2+1) = 3/-1= -3
Answer:
-3
Step-by-step explanation:
Sorry if I'm wrong.
A sample of 300 urban adult residents of a particular state revealed 65 who favored increasing the highway speed limit from 55 to 65 mph, whereas a sample of 171 rural residents yielded 78 who favored the increase. Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents?(a) Test H0: p1 = p2 = 0 versus Ha: p1 = p2 = 0 using a = 0.05, where p1 refers to the urban population. (Round your test statistic to two decimal places and your P-value to four decimal places.)z = P-value = State the conclusion in the problem context.A. Reject H0. The data does not suggest that the sentiment for increasing the speed limit is different for the two groups of residents.B. Fail to reject H0. The data suggests that the sentiment for increasing the speed limit is different for the two groups of residents. C. Fail to reject H0. The data does not suggest that the sentiment for increasing the speed limit is different for the two groups of residents.D. Reject H0. The data suggests that the sentiment for increasing the speed limit is different for the two groups of residents.(b) If the true proportions favoring the increase are actually p1 = 0.24 (urban) and p2 = 0.40 (rural), what is the probability that H0 will be rejected using a level 0.05 test with m = 297, n = 189? (Round your answer to four decimal places.)
Answer and explanation:
Null hypothesis(H0) says sentiment for increasing speed limit in the two populations is the same
Alternative hypothesis(Ha) says sentiment for increasing speed limit in the two populations is different
Where p1 is the first population proportion =65/297= 0.22
And p2 is the second population proportion = 78/189= 0.41
P= p1+p2/n1+n2= 65+78/297+189= 0.29
Hence H0= p1-p2=0
Ha=p1-p2≠0
Test statistic= p1-p2/√p(1-p) (1/n1+1/n2)
= 0.22-0.41/√0.29(1-0.29)(1/297+1/189)
= -4.49
Critical value at 95% significance level= 1.96( from tables)
We therefore reject null hypothesis as critical value is greater than test statistic
Therefore the sentiment for increasing speed limit in the two populations is different
b. at proportions of 0.24 and 0.40 for p1 and p2 respectively
Test statistic = 0.24-0.40/0.29(1-0.29)(1/297+1/189)
= -3.78
P value is 0.0002 at 0.05 significance level
Hence probability =0.4998
Evaluate the function f(x) = -4x + 2, when x = -1.
A. f(x) = -4
B. f(x) = -2
C. f(x) = 2
D. f(x) = 6
Answer:
Option D
Step-by-step explanation:
f(x) = -4x + 2
f(-1) = -4(-1) + 2 = 4 + 2 = 6
The price for four pounds of peanut butter fudge is $11.20 The price for six pounds of chocolate bark is $16.80 Which item is more expensive?
Answer:
They are the same price
Step-by-step explanation:
Price per pound for peanut butter fudge
=11.20 ÷ 4
=$2.80
Peice per pound for chocolate bark
=16.80 ÷ 6
=$2.80
6. In one state, sales tax is 6%. If sales tax on a car is $564.00, find the
price of the
car before tax.
Answer: $9400
Step-by-step explanation:
.06x = $564
divide both sides by .06
x = $9400
What is the slope-intercept equation of this line?
(0,4)
(2,-2)
A. y=-3x + 4
B. y = 4x - 3
C. y = 3x + 4
D. y = - 1/3 x+4
Answer:
A
Step-by-step explanation:
use both points to find the slope using the equation
y2-y1/x2-x1, so , -2-4/2-0 = -6/2 = -3. slope or m = -3
then the y int can be any y point, so either -2 or 4. in this case they used 4.
which values are equivalent to the fraction below? Check all that apply
Answer:
A,B,E
Step-by-step explanation:
[tex]3^{5} /3^{8}=3^{5-8}=3^{-3}=1/27=(1/3)^{3}[/tex]
Determine the slope and the y-intercept of the table.
To find slope use y2 - y1 / x2 - x1. I would suggest doing this twice just to make sure.
For this one, I will use the first three points. (2,2) (4,5) (6,8)
8 - 5 / 6 - 4 = 3/2
5 - 2 / 4 - 2 = 3/2 = your slope
Now, since there is no (0,y) given, we need to find the y-intercept using . . . You guessed it! Point - slope form! I will use the point (2,2)
y-y₁=m(x-x₁)
y - 2 = 3/2 (x - 2)
y - 2 = 3/2x -3
+2 +2
Y = 3/2x -1
-1 = your y-intercept form.
What is 7+|−9−2x|=18
Step-by-step explanation:
7+(-9-2x)=18
-9-2x=18-7
-9-2x=11
-2x=11+9
_2x=20
x=20
-2
x= -10
hope u want this..
Answer Step by Step:
Move all terms not containing |-9-2x| to the right side of the equation.
|-9-2x| = 11
Remove the absolute value term. This creates a ± on the right side of the equation because |x| = ±x.
-9-2x=±11
Set up the positive portion of the ± solution.
-9-2x=11
Solve the first equation for x.
x = -10
Set up the negative portion of the ± solution.
-9-2x=-11
Solve the second equation for x.
x = 1
(Answer) x = -10,1
What two numbers add together give me -9 but multiply together give me 18
Answer:
one number is -6 and other is-3
Step-by-step explanation:
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