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lina2011 [118]
3 years ago
11

Which of these strategies would eliminate a variable in the system of equations? ​8x+8y=2 8x+5y=1 ​ Add the equations. (Choice B

) B Subtract the bottom equation from the top equation. (Choice C) C Multiply the top equation by 1/2,then subtract the bottom equation from the top equation.
Mathematics
2 answers:
harkovskaia [24]3 years ago
7 0

Answer:

B. Subtract the bottom equation from the top equation.

Step-by-step explanation:

When looking at the two equations:

8x + 8y = 2

8x + 5y = 1

We can easily get rid of the x variable by subtracting the two equations from each other since the terms are equivalent. This would allow us to solve for the y value, which we could plug into the an equation to solve for the x value.

Lady_Fox [76]3 years ago
6 0

Answer:

Subtract the bottom equation from the top equation.

Step-by-step explanation:

i made sure it was the answer which is in khan academy.

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Elenna [48]

<u><em>Answer:</em></u>

The slope of the line is 77

<u><em>Explanation:</em></u>

We know the speed is constant and that the mile-marker location over time can be represented by a line. This means that the equation is linear.

<u>The slope can, therefore, be calculated as follows:</u>

slope = \frac{y_2-y_1}{x_2-x_1}

where (x₁ , y₁) and (x₂ , y₂) are two points on the line

We are given that the two points (1, 123) and (3, 277) are two points in the line

<u>Substitute with them in the above equation to get the slope as follows:</u>

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Hope this helps :)

3 0
3 years ago
Find the surface area of the prism below. Please see the attachment and a. 108cm ^2 is incorrect. Thanks!
creativ13 [48]

Answer: OPTION B

Step-by-step explanation:

To solve this problem you must add the areas of each rectangle that form the prism;

The area of a rectangle can be calculated with the formula:

SA=length*width

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SA_{prism}=2(6cm*2cm)+2(3cm*6cm)+2(3cm*2cm)=72cm^{2}

5 0
3 years ago
Thomas lives 350 miles from the beach. He drives to the beach at an average rate of 50 miles per hour. Use that information and
sweet-ann [11.9K]

Answer:

Step-by-step explanation:

use the equation: y =50x-350 where x is the number of hours driving

hrs                

1      50            300

2      100          250

3       150          200

5       250         100

7        350           0

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Ludmilka [50]

Answer:

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3 years ago
The circle graph shows how a family spends its annual income. If $26,450 is used for Auto and Entertainment combined, what is th
nika2105 [10]
12%+11%=23% so, $26,450/.23=$115,000.
5 0
3 years ago
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