3 years ago

Use the distributive property to multiply 4(-7x-9y-9)

Mathematics

1 answer:

Illusion [34]3 years ago

4 0

4(-7x - 9y - 9) =
-28x - 36y - 36 <==

You might be interested in

What is the solution of the following system of equations ? y- 2x and= 6 , y - 4x =0

Sveta_85 [38]

Answer:

x=3 and y=12

Step-by-step explanation:

$y-2x=6$ equation:1

$y-4x=0$ equation:2

Solving equation:1 for 'y' in terms of x

$y=6+2x$ equation:3

Putting 'y' in equation:2 which will make the equation of the single variable

$y-4x=0$

$6+2x-4x=0\\-2x=-6\\x=3$

Putting value of 'x' in equation:3 to find 'y'

$y=6+2x$

$y=6+2(3)\\y=6+6\\y=12$

6 0

3 years ago

Question 18 Item 18 The distribution of the number of moths captured per night by a certain moth trap is approximately normal wi

juin [17]

Answer:

Standard deviation 46.3

Step-by-step explanation:

A 28% of the distribution is equivalent to a z score of -0.5828, you can use a z table to find that.

Z score is calculated as follows:

$z = \frac{x-\mu}{\sigma}$

x is the number being evaluated

μ is the mean

σ is the standard deviation

And it is used to calculate how many standard deviations you are from the mean of the sample.

Replacing with the known information you can calculate the standard deviation:

$\sigma=\frac{x-\mu}{z} =\frac{76-103}{-0.5828}= 46.3$

4 0

3 years ago

You are asked to draw a triangle with side lengths of 6 inches and 8 inches. What is the longest whole number length that your t

Leni [432]

Since 6 + 8 = 14 this is the longest that the third side can be.
The answer is B

5 0

3 years ago

TIMED URGENT HELP PLS

balu736 [363]

Answer:

Step-by-step explanation:

8 0

3 years ago

Do mechanical waves travel faster or slower in more dense media?

Lunna [17]

When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same

8 0

3 years ago

Read 2 more answers