Erin weighs 135 pounds and is gaining ½ pound each week. Miranda weighs 143 pounds and is losing ¼ pound each week. Write an equation that could be used to determine x, the number of weeks that it will take until the two girls weigh the same amount?

Step-by-step explanation:

Number of weeks is x

Step-by-step explanation:

Let E represent Erin’s weight, and let M reprevent Miranda’s weight.

And let x represent the amount of week that passes.

Eric is currently 135 pounds. However, she is gaining 1/2 pounds per week x.

Hence, we can write the following equation:

Miranda currently weights 143 pounts. However, she is losing 1/4 pounds per week x.

Since she is losing weight, 1/4 is negative. Hence:

When the two girls weigh the same, D=M. Thus:

Substitute them for their respective equations to acquire:

Notes:

To solve, first eliminate the fractions by multiplying everything by 4. This yields:

Add x to both sides. Subtract 540 from both sides:

Divide both sides by 3:

Hence, it will take about 11 weeks for the girls to weigh the same.

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

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