3 years ago

A = 3x2(x - 1) B = -3.23 + 4x2 –25 + 1

1 answer:

8 0

Answer: Not sure what you're asking, but if you just want the two expressions calculated, A = 6x - 6, or factored, 6(x-1); B = -19.23

Step-by-step explanation:

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Explain how to isolate the variable in this equation -2/5x+7=15

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Answer:

$x = -20$

Step-by-step explanation:

Use inverse operations and simplification to isolate the variable in the equation.

$-\frac{2}{5}x + 7 = 15\\-7\\\\-\frac{2}{5}x = 8\\$

Now divide the equation by $(-\frac{2}{5})$ remember, dividing a fraction is the same as multiplying by the reciprocal. The reciprocal of a fraction is when one switches the places of the numerator (number on top of a fraction bar), and the denominator (number on the bottom of the fraction bar).