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3 years ago

Three consecutive integers have a sum of -21. Which equation can be used to find the value of the three numbers?

Mathematics

1 answer:

umka21 [38]3 years ago

7 0

Answer: x + (x + 1) + (x + 2) = -21

Step-by-step explanation:

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13. Use a net to find the surface area of the prism.

Viefleur [7K]

Answer:

516 inches

Step-by-step explanation:

2(8(6)) + 2(15(6)) + 2(15(8))

96 + 180 + 240 = 516in

The answer is 516in

*Please mark me the brainliest. Thanks

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2 years ago

The perimeter of a square is 28x – 4.

Scorpion4ik [409]

Answer:

Step-by-step explanation:

Divide both 28x and -4 by 4 because a square has 4 equal sides. That comes out to 7x-1, therefore answer B is correct.

8 0

3 years ago

At Tanika's school, 3 people are chosen

likoan [24]

Your answer is three out of the people in your school.

5 0

3 years ago

Evaluate A + 3B if possible. HELP ASAP!

madreJ [45]

Answer:

Not possible.

Step-by-step explanation:

Addition of Matrix A and Matrix B is possible only if the order of matrix A is same as the order of matrix B.

Order of a matrix with $m$ rows and $n$ columns is $m\times n$ .

Here, matrix A is $\left[\begin{array}{ccc}2&-4\\-4&10\\0&-8\end{array}\right]$

Matrix B is $\left[\begin{array}{ccc}0&-4&6\\2&-10&4\end{array}\right]$ .

Multiplying a matrix by a constant doesn't change its order.

So, order of matrix A is $3\times 2$ as it has 3 rows and 2 columns.

The order of matrix 3B is $2\times 3$ as it has 2 rows and 3 columns.

Therefore, addition is not possible as the order is different.

4 0

3 years ago

Fine the following when a=-2, b=4, c=7<br> 7b-12 over 2ac

iren [92.7K]

Hello!

You have to put the numbers in for the variables in the equation

$\frac{7b - 12}{2ac}$

Put the numbers in

$\frac{7(4) - 12}{4(-2)(7)}$

Combine like terms

$\frac{28 - 12}{-56}$

$\frac{16}{-56}$

The is is $\frac{16}{-56}$ or about -0.29

Hope this help!

3 0

3 years ago