1 year ago

HELP. ME. PLEASE. .....................................

Mathematics

1 answer:

Goshia [24]1 year ago

8 0

Answer:

it's C just did the quiz and go it right

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Factor x2 – 8x + 15. Which pair of numbers has a product of ac and a sum of b?

Troyanec [42]

-5 and -3 are your numbers.

7 0

3 years ago

The sum of 3 times a number and 7 is 25

hammer [34]

Mathematically written:

3 * x + 7 = 25

3x + 7 = 25

3x = 25 - 7

3x = 18

x = 18 / 3

x = 6

Proof:

3 * 6 + 7 = 25

18 + 7 = 25

25 = 25 → both sides of the equation are equal, our answer is correct

Notes:

A number - Is an unknown number, called a variable, which in this case is substituted by the letter x.

Hope it helped,

BioTeacher101

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3 years ago

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Which matrix equation represents the system of equations? {-x+ 2y = 0 y= -2

Snowcat [4.5K]

We are given a system of equations,

$\begin{cases}-x+2y=0\\y=-2\\ \end{cases}$

This will translate into a 2x2 matrix of coefficients (because 2 equations and 2 unknowns),

$\begin{bmatrix}-1&2\\0&1\\ \end{bmatrix}$

The matrix will then be applied to the vector (lower dimensions on top),

$\begin{bmatrix}x\\y\\ \end{bmatrix}$

And the result vector will be whats on the other side of equals sign,

$\begin{bmatrix}0\\-2\\ \end{bmatrix}$

So to put everything together,

$\begin{bmatrix}-1&2\\0&1\\ \end{bmatrix}\begin{bmatrix}x\\y\\ \end{bmatrix}=\begin{bmatrix}0\\-2\\ \end{bmatrix}$

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3 years ago

The triangles are similar. what is the value of x? enter your answer in the box.

weqwewe [10]

Answer:

l*b*h is the answer of this question

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2 years ago

Giving brainlyest 1.36 +0.9

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Answer: 2.26

Step-by-step explanation://Give thanks(and or Brainliest) if helpful (≧▽≦)//

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3 years ago

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