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3 years ago

.Distribute and combine like terms: −4(7r + 7)

Mathematics

1 answer:

Vilka [71]3 years ago

3 0

Answer:

−28r−28

Step-by-step explanation:

−4(7r+7)

=(−4)(7r+7)

=(−4)(7r)+(−4)(7)

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Solve the following system of equations. -2x-3y=5 7x+8y=0

Rama09 [41]

Answer:

X=8

y=-7

Step-by-step explanation:

Explanation is in picture (Where the lines cross is your answer)

3 0

3 years ago

Another ez 10 pnts :D

horsena [70]

Answer:

$\frac{6}{5}$

Step-by-step explanation:

1.Turn the 9 into a fraction

$\frac{2}{15} *\frac{9}{1}$

2.factor the bigger numbers.

$\frac{2}{3*5} *\frac{3*3}{1}$

3.Cancel out the common factor(3)

$\frac{2}{5} * \frac{3}{1}$

4.multiply across

$\frac{2}{5} *\frac{3}{1} =\frac{6}{5}$

4 0

3 years ago

Ok, I made a mistake on my last question, but this time I have the right one. Solve v, 5/v=2/7.25

Marina CMI [18]

Answer:

$v=\frac{145}{8}$

Step-by-step explanation:

$\frac{5}{v}=\frac{2}{7.25}$

$\frac{5}{v}=\frac{2}{\frac{725}{100}}$

$v=\frac{2}{\frac{5^2*29}{2^2*5^2}}$

$v=\frac{145}{8}$

6 0

3 years ago

Please answer the question that is in the photo attached below

rewona [7]

Answer:

$\huge\boxed{b=\sqrt{7}}$

Step-by-step explanation:

In order to solve for this equation we have to note a couple of things.

There is a diagonal square inside a larger square. The space formed by the smaller square not being in the larger square is a right triangle.

The side length of the smaller square (4) is also the hypotenuse of this triangle.

Since we know that the other side length of the triangle is 3, we can use the Pythagorean Theorem to find the value of b.

The Pythagorean Theorem states that $a^2 + b^2 = c^2$ , where a and b are the legs and c is the hypotenuse.

We can substitute 3 in as a and 4 in as c and find b.

$3^2 + b^2 = 4^2$

$9+b^2=16$

$b^2=7$

$b = \sqrt{7}$

So b is $\sqrt{7}$ units long.

Hope this helped!

4 0

3 years ago

Read 2 more answers

Which scale factors produce a contraction under a dilation of the original image?

Leokris [45]

Answer:

1/2

-1/2

Step-by-step explanation:

we know that

If a dilation produce a contraction that means that the absolute value of the scaling factor is less than 1

If a dilation produce an enlargement that means that the absolute value of the scaling factor is greater than 1

Verify each case

case 1) 2

$\left|2\right|=2$

$2 > 1$ ----> is a enlargement

case 2) 1/2

$\left|1/2\right|=1/2$

$1/2 < 1$ ----> is a contraction

case 3) -2

$\left|-2\right|=2$

$2 > 1$ ----> is a enlargement

case 4) -1/2

$\left|-1/2\right|=1/2$

$1/2 < 1$ ----> is a contraction

7 0

3 years ago