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joja [24]
4 years ago
7

Hi there! Please, please help me on these problems! And show how to do it, thanks!!

Mathematics
1 answer:
yan [13]4 years ago
8 0
1). 8 x 5x - 8 x 3y
     40x - 24y

you have to multiply the eight inside the parentheses 
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I dont understand this
Mekhanik [1.2K]
Isn’t there any words or some thing
6 0
3 years ago
4|m-n|<br> If m=-7 and n=2
Snowcat [4.5K]
You would first substitute -7 for m and 2 for n. It would look like this: 4| -7-2 | . we first solve the absolute value because it is the first step in PEMDAS or order of operations. -7-2 is equal to -9. Our equation should look like this now: 4 |-9| . we solve the absolute value portion, the absolute value of a negative number is the the same number but positive. the absolute value would be 9. (we just take the negative symbol off). we now have 4 x 9. This is equal to 36.

36 is the answer.
6 0
3 years ago
one estimate for the rate at which natural process can replace topsoil that has been eroded is about 2 millimeters per year at t
bulgar [2K]

Answer:

50 years

Step-by-step explanation:

First convert millimeters to centimeters. 2 millimeters is equivalent to 0.2 centimeters. Then divide 10 by 0.2. Answer should be 50

7 0
3 years ago
The slope of a line perpendicular to the line whose equation is y = 3x - 4 is
trapecia [35]

Answer:

m = -1/3

Step-by-step explanation:

y = 3x-4

This is in slope intercept form

y = mx+b  m is the slope and b is the y intercept

The slope is 3 and the y intercept is -4

We want the slope of a line that is perpendicular

Perpendicular lines have slopes that multiply to -1

Let m be the slope of the line that is perpendicular

3 * m = -1

Divide each side by 3

3m/3 = -1/3

m = -1/3

6 0
3 years ago
Fint the are and perimeter of the shape at the bottom
umka21 [38]

Answer:

Area: 59.5 ft squared

Perimeter: 31.6 feet

Step-by-step explanation:

<u>Area:</u>

For the area of the square, you're going to use the formula length times width. The length and width are both 7, so you'll do 7 times 7, which is 49. Next, you need to find the area of the triangle. It's a bit more confusing since they give you the hypotenuse (7.6 ft), but they did that to try and trick you. The area of a triangle is length times width divided by two. So, you're going to take the width (3) and multiply it by the length (7). The length is 7 because the length of the square and the triangle are the same since the bottom of the triangle is the same length as the top of the square. Anyway, using the formula, you will do 7 times 3 divided by 2, which is 21 divided by 2, which is 10.5. Add the 10.5 to the 49 we got from the square, and you'll get 59.5 feet squared.

<u>Perimeter:</u>

For the perimeter, you just need to add the side lengths. Starting at the top and going to the right, we can add 7.6+7+7. We don't get the left length, but it's the same as the rest of the square (7) because all sides of a square are equal. So, now we have 7.6+7+7+7, which is 28.6, and we just need the last one which is 3, so the final answer is 31.6 feet.

7 0
3 years ago
Read 2 more answers
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