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3 years ago

Please help me with this

Mathematics

1 answer:

Alex787 [66]3 years ago

6 0

Im srry i cant help with that because K12 will not let me look up answers i bet

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Please help me understand this! Thanks a bunch if you help!

mariarad [96]

Segment BD equals 12<span />

6 0

3 years ago

Which of the following is a factor of 7x2 - 12x - 4? (6 points)

grin007 [14]

Answer:

We conclude that 'None of the above' is the correct answer.

Step-by-step explanation:

Given the expression

$7x^2\:-\:12x\:-\:4$

Breaking the expression into groups

$7x^2\:-\:12x\:-\:4=\left(7x^2+2x\right)+\left(-14x-4\right)$

Factor out $x$ from $7x^2\:+\:2x$

$=x\left(7x+2\right)$

Factor out -2 from $\left(-14x-4\right)$

$=-2\left(7x+2\right)$

so the expression becomes

$7x^2\:-\:12x\:-\:4=\left(7x^2+2x\right)+\left(-14x-4\right)$

$=x\left(7x+2\right)-2\left(7x+2\right)$

Factor out the common term $7x+2$

$=\left(7x+2\right)\left(x-2\right)$

Therefore, from the given options, we conclude that 'None of the above' is the correct answer.

4 0

2 years ago

What is the value of n

Trava [24]

Answer:

c. 38

Step-by-step explanation:

5 0

3 years ago

Find AB using the given matrices.

solniwko [45]

The entry in row 1, column 1 of $\mathbf{AB}$ is

$\begin{bmatrix}2&4\end{bmatrix}\begin{bmatrix}5\\6\end{bmatrix}=2\cdot5+4\cdot6=34$

(i.e. the dot product of row 1 of $\mathbf A$ and column 1 of $\mathbf B$ )

The entry in row 1, column 2 of $\mathbf{AB}$ is

$\begin{bmatrix}2&4\end{bmatrix}\begin{bmatrix}-9\\-4\end{bmatrix}=2\cdot(-9)+4\cdot(-4)=-34$

The second option is the correct answer.

5 0

2 years ago

If twice the sum of their ages is 66 years, find Conor's age

Dovator [93]

I think 34? because 34 x 2 equals 68, but 35 x 2 is 70?

5 0

3 years ago