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3 years ago

-7y = -84 what does y equal

2 answers:

6 0

To "solve" equation with a single variable you perform whatever operations necessary to isolate the variable by itself on one side of the equal (or inequality) sign. Because it is an equality whatever operation you perform on one side you must also perform on the other side, otherwise you eliminate the equality of the expression or equation...

-7y=-84 divide both sides by -7

y=12

babunello [35]3 years ago

4 0

Okay, so first you need to divide both sides by -7!

That would leave you with y = 12 because:

-7y / -7y = y
-84 / -7 = 12

That equals

y = 12! Have a great day and I hope I helped!

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3 years ago

Please help me with this.

JulijaS [17]

The speed intervals such that the mileage of the vehicle described is 20 miles per gallon or less are: v ∈ [10 mi/h, 20 mi/h] ∪ [50 mi/h, 75 mi/h]

<h3>How to determine the range of speed associate to desired gas mileages</h3>

In this question we have a quadratic function of the gas mileage (g), in miles per gallon, in terms of the vehicle speed (v), in miles per hour. Based on the information given in the statement we must solve for v the following quadratic function:

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To learn more on quadratic functions: brainly.com/question/5975436

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