LAST QUESTION ON TEST, DESPERATELY NEED HELP
Solve the following: -4x - 2 = -2(1 - 4x)

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Ответ:

jaylaa04

12.11.2022

Mathematics

If Y equals 8, X is equal to 17.

If Y drops to 4, X is equal to 19.

Step-by-step explanation:

We know that the equation is Y = 47.25- 2.25X and we want to find X when Y = 8. To do this we solve the equation for X.

$47.25-2.25X=8\\47.25\cdot \:100-2.25X\cdot \:100=8\cdot \:100\\4725-225X=800\\4725-225X-4725=800-4725\\-225X=-3925\\\frac{-225X}{-225}=\frac{-3925}{-225}\\X=\frac{157}{9}=17.4444...$

17.4444 rounded to the nearest whole number is 17.

If Y drops to 4,

$4 = 47.25- 2.25X\\47.25-2.25X=4\\47.25\cdot \:100-2.25X\cdot \:100=4\cdot \:100\\4725-225X=400\\4725-225X-4725=400-4725\\-225X=-4325\\X=\frac{173}{9}=19.2222...$

19.2222 rounded to the nearest whole number is 19.

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LAST QUESTION ON TEST, DESPERATELY NEED HELP Solve the following: -4x - 2 = -2(1 - 4x)