2.Select all the expressions that are equivalent to 6-X.
Equivalent to 6 - x
a. X- 6
b. 6 + -x
c. -x + 6
d. -6 + x
e. 6 + x
[tex]\textbf{b.)} ~ 6+(-x)\\\\\textbf{c.)} ~ -x+6\\[/tex]
Can you help me please?
Pls help, will mark brainliest!!
1. Phil is about to take a test that contains matching questions worth 10 points each and essay questions worth 25 points each. He must do at least 3 matching questions, but time restricts doing more than 12. Phil must do at least 4 essays, but time restricts doing more than 15. If no more than 20 questions can be answered, how many of each type should Phil do in order to maximize his score?
a. Define variables and write constraints for this problem.
b. Write an equation for what you want to maximize or minimize.
Answer:
hope you can understand
HELP ASAP- NO LINKS AND NO JOKES
a student solved a system of equations as shown below
3x+2y=7
5x-4y=-3
which step in the solution contains the first error
A. Step 4
B. Step 6
C. step 2
D. Step 1
Answer:
A
Step-by-step explanation:
step 3 is correct
x = 1
in step 4 the student has substituted x = 1 into y instead of x, that is
3x + 2(1) = 7 ← Incorrect substitution
Should be
3(1) + 2y = 7
3 + 2y = 7 ( subtract 3 from both sides )
2y = 4 ( divide both sides by 2 )
y = 2
Answer:
A. Step 4
Step-by-step explanation:
Identifying the error
In step 4 the value of x is supposed to be substituted into the second equation however the value of x is instead substituted for y which is the first error made
Solving it correctly and explaining each step.
We have the two equations 3x + 2y = 7 and 5x - 4y = -3
It appears that the elimination method is being used as the first step consist of multiplying the first equation by 2 so that we have the two variables -4y and 4y which can cancel out in the next step so we are going to use the elimination method as well to solve it correctly.
What is the elimination method?
The elimination method is a method used to solve a system of equations. When you have two variables that have the same coefficient ( number before variable; x or y ) but different signs ( it works if they have the same too ) you can add the two equations eliminating one of the variables. Using this method will leave you with a singular variable in which you can solve
Solving it using the elimination method
Again we have the two equations 3x + 2y = 7 and 5x - 4y = -3
(step 1) Notice how the first equation has 2y which can be multiplied by 2 resulting in us getting 4y which is opposite of -4y. This sets us up exactly for using the elimination method.
Thus the first step would be too multiply the first equation by 2
3x + 2y = 7
x2
------------------
6x + 4y = 14
Now we have the two equations 6x + 4y = 14 and 5x - 4y = -3
(step 2)Our next step would be to add the two equations so that the variable y is eliminated
6x + 4y = 14
+ 5x - 4y = -3
--------------------
11x 0 = 11
We're left with 11x = 11
(step 3)Our next step would be to solve for x
11x = 11
==> divide both sides by 11
x = 1
(step 4) Now that we have defined one of are variables we plug it in into one of the equations and solve for the other, this is step 4.
5x - 4y = -3
==> plug in x = 1
5(1) - 4y = -3
(step 5)==> simplify
5 - 4y = -3
(step 6) ==> subtract 5 from both sides
-4y = -8
(step 7) ==> divide both sides by -4
y = 2
The real solution would be (1,2)
simplify negative square root of 72
Can someone help I don’t understand.
Answer:
that is reading my friend
Step-by-step explanation:
Answer:
Sidney is shallow but busy. One common boating hazard in this city are the rocks, stingrays, and sharks. Rounf trip fair: $2000 hotel cost: 250 for 1 night and and or 2500 for 10 nights. total travel expense: $4500.
Step-by-step explanation:
Sidney is shallow but busy. One common boating hazard in this city are the rocks, stingrays, and sharks. Rounf trip fair: $2000 hotel cost: 250 for 1 night and and or 2500 for 10 nights. total travel expense: $4500.
The diameter of a circle is 26 cm. Find its area to the nearest whole number.
Answer:
531
Step-by-step explanation:
The area of a circle can be determined by the equation: A = πr².
The "r-value" represents the radius, which is half of the diameter. Since the diameter is in cm, the area will have the unit cm².
d = diameter r = radius π = 3.14..... A = area
d / 2 = r
26 / 2 = r
13 cm = r
A = πr²
A = π(13)²
A = 169π
A = 530.929.... cm²
A = 531 cm²
As you can see, the radius was determined to be 13 cm. When you plug that value into the area equation, you get 530.9 cm². Rounding to the nearest whole number would bump the 0 to 1, making the final answer 531 cm².
The selling price of an item is $720. It is marked down by 30%, but this sale price is still marked up from the cost of $420. Find the markup from cost to sale price.
The markup cost is $84 if the selling price of an item is $720. It is marked down by 30%, but this sale price is still marked up from the cost of $420.
What is markup price?Markup pricing is the practice in which the price of products or commodity is determined by taking all the goods together and adds a fraction as a markup.
We have:
The selling price of an item is $720. It is marked down by 30%
[tex]\rm = 720\times \dfrac{30}{100}[/tex]
Markdown = 216
Now subtract it from the selling price:
= 720-216
Sale price = 504
Now,
= 504-420
Markup cost = $84
Thus, the markup cost is $84 if the selling price of an item is $720. It is marked down by 30%, but this sale price is still marked up from the cost of $420.
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Help me answer this please
Answer:
1. d
2 c
3 a
4 g
5 h
6 e
7 b
8 f
9 i
10 j
Step-by-step explanation:
The pythagorean theorem applies to what kind of triangle?.
Answer:
Right angled triangle
Step-by-step explanation:
Right angled triangle has angle of 90degree
Answer:
Step-by-step explanation:
It applies only to a right angled triangle.
find the area of the red shaded region round to the nearest tenth.
Answer:
28.5 in²
Step-by-step explanation:
find the area of the quarter circle:
(pi x r²)/4
100pi/4 =
25pi
To get the shaded region minus the triangle from the quarter circle:
Formula for triangle is bh/2
25 pi - Area of triangle
25 pi - (10x10)/2
25pi - 50
Which is approximately 28.5 square inches.
What does 18x12x1000 equal to?
First, we calculate 18 x 12
18 x 12 = 216.
To multiply a number by 1000, we add 3 zeros after it.
So, 216 x 1000 = 216000
-> 18 x 12 x 1000 = 216000.
180 : 60 simplified pls
Answer: Heyaa!
60 Cant be Simplified so it stays the same.
Step-by-step explanation:
Nothing further can be done with this topic.
Hopefully this helps you !
- Matthew ~
Order the cities according to population density (persons/sq. km), from greatest to smallest.
Answer:
Step-by-step explanation:
City Population Density (Persons/Square Mile) 2016 Population Land A...
New York, New York 28,211 8,537,673 303
Los Angeles, California 8,484 3,976,322 469
Chicago, Illinois 11,883 2,704,958 228
View 751 more rows
(using tables of x- and y-values).
x² - 3= 2x
a. X= -1 or x = 3
C. X = -3 or x = -3
b. x= 2 or x = -3
d.x=1 or x = -1
I need help with this plss
Answer:
a
Step-by-step explanation:
x² - 3 = 2x ( subtract 2x from both sides )
x² - 2x - 3 = 0 ← in standard form
consider the factors of the constant term (- 3) which sum to give the coefficient of the x- term (- 2)
the factors are - 3 and + 1 , since
- 3 × + 1 = - 3 and - 3 + 1 = - 2 , then
x² - 2x - 3 = (x - 3)(x + 1) = 0 ← in factored form
equate each factor to zero and solve for x
x + 1 = 0 ⇒ x = - 1
x - 3 = 0 ⇒ x = 3
If data set A has a larger standard deviation than data set B, data set B is
more spread out than data set A.
REST
TE
TER
O A. True
B. False
Reason:
Data set A has the larger standard deviation, so it is more spread out.
Srekar needs to increase the length, width, and height of the prism below by 2 inches. The original prism has a length of 3 inches, a width of 2 inches, and a height of 1 inch.
A prism has a length of 3, height of 1, and width of 2.
Which statements about the new prism are true? Select three correct answers.
The new prism will have a length of 5 because 3 + 2 = 5.
The new prism will have a width of 4 because 2 + 2 = 4.
The new prism will have a height of 2 because 1 times 2 = 2.
The volume will increase by 6 because 2 times 3 = 6 and each of the 3 dimensions is increased by 2.
Srekar could increase the volume by the same amount by just adding 6 to the height instead of 2 to each side.
The volume of the new prism will be 20 times 3 = 60 because there will be 20 cubes in each layer and the height will be 3 so there will be 3 layers of 20 cubes each.
The three correct statements are:-
The new prism will have a length of 5 because 3 + 2 = 5.The new prism will have a width of 4 because 2 + 2 = 4.The new prism will have a height of 2 because of 1 time 2 = 2.What is a rectangular prism?
A rectangular prism is a three-dimensional rectangular object having all surfaces rectangular.
It is given in the question:-
Sarkar needs to increase the length, width, and height of the prism below by 2 inches. The original prism has a length of 3 inches, a width of 2 inches, and a height of 1 inch. A prism has a length of 3, a height of 1, and a width of 2.
The solution will be:-
The new prism will have a length of 5 because 3 + 2 = 5.The new prism will have a width of 4 because 2 + 2 = 4.The new prism will have a height of 2 because of 1 time 2 = 2.
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Please explain how to get the answer too! I'm so confused.
Answer:
360
Step-by-step explanation:
So I did 5 x 6 x 6 x 2 = 360
Consider the diagram below. Find the value of w.
Answer: 63
Step-by-step explanation:
The acute angles of a right triangle are complementary, so [tex]w+27=90 \longrightarrow w=63[/tex]
HELPP ASAP!! ILL MAKE YOU THE BRAINIEST!
Using the given diagram solve for x
Answer:
x = 5
Step-by-step explanation:
the angle bisector divides the opposite sides into segments that are proportional to the other 2 sides , that is
[tex]\frac{x}{3}[/tex] = [tex]\frac{10}{6}[/tex] ( cross- multiply )
6x = 30 ( divide both sides by 6 )
x = 5
If data is normally distributed and has μ = 90 and o-10, what is the z-score for a data value of 75?
Answer:
The z-score for this data is -1.5
Step-by-step explanation:
Step 1: For the specified distribution and data point,
μ = 90, σ = 10, and x = 75 (given)
Step 2: We now apply the z-score formula:
z = x − μ / σ
z = 75 - 90 / 10
z = - 15 / 10
z = -1.5
We can take it a step further:
A z-score table shows the percentage of values (usually a decimal figure) to the left of a given z-score on a standard normal distribution
percentage of value = 0.0668
alg 1 adding/subtracting with rational expression
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Let's evaluate ~
As the denominator of both the terms is same, we can simply perform subtraction on numerator.
That is :
[tex]\qquad \sf \dashrightarrow \: \dfrac{a - 2}{ {a}^{2} + 7a + 6 } - \dfrac{5a - 6}{ {a}^{2} + 7a + 6 } [/tex]
[tex]\qquad \sf \dashrightarrow \: \dfrac{a - 2 - (5a - 6)}{ {a}^{2} + 7a + 6 } [/tex]
[tex]\qquad \sf \dashrightarrow \: \dfrac{a - 2 - 5a + 6}{ {a}^{2} + 7a + 6 } [/tex]
[tex]\qquad \sf \dashrightarrow \: \dfrac{ - 4a + 4}{ {a}^{2} + 7a + 6 } [/tex]
Answer:
-4a + 4/ a^2 + 7a +6
Find the angle x on the line. a triangle has 38 at the top and 101 on the outside of it.
Answer:
x=79°
Step-by-step explanation:
[tex]x + 101 = 180( < \: on \: str \: line = 180) \\ x = 180 - 101 \\ x = 79[/tex]
Find the area of the rhombus. using 9cm and 6cm
Answer:
27
Step-by-step explanation:
The formula is pq/2. If you plug in your values, you will get 27.
can someone help me with this.........asap
If p= -1,-1 find the image p under the following rotation 70 degrees counterclockwise
I know
Step-by-step explanation:
I wish I it but i dont and i think that other person will
what is the slope of a line that passes through the points (-3,7) and (7,5)
Answer:
the answer IS. -1/5 which it could be written as -0.2. NOTE: please consider the negative signs in calculating
can anyone please solve this and tell me if it's correct please
Answer:
Q1. 15
Q2. You're correct
Q3. 3.60
Q4. 2 Correct
Step-by-step explanation:
Ann weighs 259 pounds but is only 5 feet 3 inches tall. Betty is 6 feet tall. How much would you expect Betty to weigh if they have the same height/weight ratio?
A. 226.62 LBS
B. 24 LBS
C. 518.00 LBS
D. 296.00 LBS
I WILL GIVE BRAINLELIST
Answer:
D. 296.00 LBS
Step-by-step explanation:
We convert both heights to inches.
1 ft = 12 in.
5 ft 3 in = 5 × 12 in. + 3 in. = 63 in.
6 ft = 6 × 12 in. = 72 in.
[tex] \dfrac{63~in.}{259~lb} = \dfrac{72~in.}{x} [/tex]
[tex] \dfrac{63x}{259} = 72~lb [/tex]
[tex] x = \dfrac{259 \times 72~lb}{63} [/tex]
[tex] x = 296~lb [/tex]
Answer: D. 296.00 LBS
This cylindrical fish tank has a height of 38 inches and a diameter of 26 inches. What is the volume of the fish tank? Use 3.14 for . Round to the nearest inch.
The volume of the fish tank having height 38 inches and diameter 26 inches = 20,165.08 [tex]inch^{3}[/tex]
What is Volume of cylinder?The volume of a cylinder is the number of unit cubes (cubes of unit length) that can be fit into it. It is the space occupied by the cylinder as the volume of any three-dimensional shape is the space occupied by it.
The height of the fish tank = 38 inches
Diameter = 26 inches
Radius of fish tank = 13 inches
Volume of the fish tank =[tex]\pi* r^{2}*h[/tex]
= 3.14 x 13 x13 x 38
= 3.14 x 169 x 38
= 20,165.08 [tex]inch^{3}[/tex]
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