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3 years ago

6b^3 (2a+7b), how to solve it?

1 answer:

6 0

6b^3 (2a+7b)


(6b^3)(2a+7b)


=(6b^3)(2a)+(6b^3)(7b)


=12ab^3+42b^4]

Answer: 
12ab^3+42b^4

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2 Describe the solution set of y=8

Vedmedyk [2.9K]

Answer:

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2 years ago

Solve the system of equations given . -2x+5y=-3

algol13

For this case we have the following system of equations:

$-2x + 5y = -3\\y-15 = 3x$

We multiply the second equation by -5:

$-5y + 75 = -15x$

Now we add the equations:

$-2x-5y + 5y + 75 = -3-15x\\-2x + 75 = -3-15x\\-2x + 15x = -75-3\\13x = -78\\x = \frac {-78} {13}\\x = -6$

We find the value of the variable "y":

$y = 3x + 15\\y = 3 (-6) +15\\y = -18 + 15\\y = -3$

THE solution is: (-6, -3)

Answer:

(-6, -3)

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3 years ago

Two values of x that are roots of xsquared+2x-6=0

xz_007 [3.2K]

The two values of x are

1.65 , -3.65

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3 years ago

Read 2 more answers

Aaron run 6 miles each day for three days. How many miles does she run it all? Write an addition and a multiplication sentence t

artcher [175]

6*3=18 miles in total

8 0

3 years ago

Automobile engineers wanted to check the effect of a new automatic transmission on mileage. They selected 50 cars of the same ma

daser333 [38]

Answer:

d. Twenty-five cars are randomly selected with the new transmission and 25 with the old transmission.

Step-by-step explanation:

A hypothesis test on the difference between the means must satisfy the following conditions

1) the samples must be randomly selected

2) each sample must have a known standard deviation

3) the samples must be independent

4) the samples must be from normal distribution

Hence only part d gives the right answer.

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2 years ago