Simplify the expression: x7 · y3 · x8 · y2

Mathematics

1 answer:

OLga [1]3 years ago

5 0

X^15 times y^5.
When you multiply numbers with the same base, you simply add the exponents.

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Select all statements below which are true for all invertible n×n matrices A and B

nirvana33 [79]

The statements that are rue for all invertible n×n matrices A and B are:
(A+B)(A−B)=A^2−B^2
and
(ABA^−1)^4=AB^4A^−1
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Order the following decimals from greatest to least (separated by

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Answer:

0.14, 0.5, 0.71, 0.8, 0.83

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Answer:

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Step-by-step explanation:

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3 years ago

In order to solve the following system of equations by addition, which of the

Pavlova-9 [17]

Answer:

Multiply the top equation by -3 and the bottom equation by 2

Step-by-step explanation:

Given system of equations:

$\begin{cases}4x-2y=7\\3x-3y=15 \end{cases}$

To solve the given system of equations by addition, make one of the variables in both equations sum to zero. To do this, the chosen variable must have the same coefficient, but it should be negative in one equation and positive in the other, so that when the two equations are added together, the variable is eliminated.

To eliminate the variable y:

Multiply the top equation by -3 to make the coefficient of the y variable 6:

$\implies -3(4x-2y=7) \implies -12x+6y=-21$