Solve for
a. 7a-2b = 5a+b

Answer:

-4

Step-by-step explanation:

so a minus divided by a plus is a minus so -8÷2 is -4.

Final answer:

A t-chart representing the y = |5x| shows pairs of x and y values, where y is the absolute value of 5 times x. Whether x is negative or positive, y is always positive, demonstrating the dependence of y on x in the total value context.

Explanation:

The absolute value equation given is y = |5x|. A t-chart representing this equation would list several values of x against their corresponding y values, where y is the absolute value of 5 times x. For instance, for x = -1, y = |-5| = 5; for x = 0, y = |0| = 0; for x = 1, y = |5| = 5. Thus, the t-chart should show that, regardless of whether x is negative or positive, y is always positive, given the nature of absolute value.

Here's an example of what the t-chart could look like:

• (-1, 5)
• (0, 0)
• (1, 5)

The dependence of y on x in this scenario is such that y increases linearly as the absolute value of x increases.

Learn more about t-chart here:

brainly.com/question/32268200

#SPJ2

Answer: Choice C

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Explanation:

Choices A, B and D are not true because of the negative y values. The result of an absolute value is never negative. So we can rule out choices A, B, and D. We have choice C as the only thing left, so this must be the answer.

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Another way to see this is by plugging in each x value to see what y value comes out.

• If x = -2, then y = |5*x| = |5*(-2)| = |-10| = 10
• If x = -1, then y = |5*x| = |5*(-1)| = |-5| = 5
• If x = 0, then y = |5*x| = |5*0| = |0| = 0
• If x = 1, then y = |5*x| = |5*1| = |5| = 5
• If x = 2, then y = |5*x| = |5*2| = |10| = 10

The y outputs from top to bottom are: 10, 5, 0, 5, 10

This matches with what choice C shows.

Answer:

72

explanation:

Just took the test

Answer:

A 72$

and a good day

Answer:

(4, 7 )

Step-by-step explanation:

given the 2 equations

3x - 8y + 44 = 0 → (1)

7x = 12y - 56 ( subtract 12y - 56 from bpth sides )

7x - 12y + 56 = 0 → (2)

multiplying (1) by 7 and (2) by - 3 and adding the result will eliminate x

21x - 56y + 308 = 0 → (3)

-21x + 36y - 168 = 0 → (4)

add (3) and (4) term by term to eliminate x

(21x - 21x) + (- 56y + 36y) + (308 - 168) = 0

0 - 20y + 140 = 0 ( subtract 140 from both sides )

- 20y = - 140 ( divide both sides by - 20 )

y = 7

substitute y = 7 into either of the 2 orinal equations and solve for x

substituting into (1)

3x - 8(7) + 44 = 0

3x - 56 + 44 = 0

3x - 12 = 0 ( add 12 to both sides )

3x = 12 ( divide both sides by 3 )

x = 4

solution is (4, 7 )