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Dafna11 [192]
3 years ago
7

4a/5 (10a-25b) pls help me !ill give brainlist

Mathematics
1 answer:
WITCHER [35]3 years ago
5 0

Answer:

8a² - 20ab

Step-by-step explanation:

4a/5 (10a - 25b)

8a² - 20ab

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Can I get some help please? <br><br><br> Thanks!
quester [9]
An ellipse (oval shape) is expressed by the following equation:

\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2}=1 where h is the x coordinate of the center and k is the y coordinate of the center. Furthermore, a is the horizontal distance from the center, and b is the vertical distance from the center. Lastly, c is the distance from the center to one of the foci (they are spaced apart equally).

We can find the foci by using a^2 - b^2 = c^2

36 - 11 = c^2

c =  \sqrt{25}  = 5

Since the k value in this case is 0, the y value of both foci are 0. Also, since h and k are both 0, we know the center of the ellipse is at the origin.

So the foci are (-5, 0) and (5, 0)

Hope this helps :)

3 0
3 years ago
An account earns simple interest. $1800 at 6.5% for 30 months Find the interest earned.
horrorfan [7]
Okay. The formula for simple interest is prt. You multiply the principal (initial amount) by the rate (percentage) by the time (months or years). $1,800 is the principal and 6.5% is the percentage rate. 1,800 * 6.5% (0.065) is 117. You earn $117 in interest annually. The time period is 30 months. There are 12 months in 1 year. Divide the amount of months by 12 to put it in a decimal. 30/12 is 2.5. Now, multiply 117 by 2.5 to find the total amount of interest earned. 117 * 2.5 is 292.5. There. The total amount of interest earned is $292.50.
4 0
3 years ago
Which expression is not a polynomial?
solmaris [256]

Answer:

B.

Step-by-step explanation:

For an expression to be a polynomial , it must contain no square roots of variables, no fractional or negative powers on the variables, and no variables in the denominators of any fractions.

7 0
3 years ago
Read 2 more answers
|-4y+2z|-7z z=-9 and y=2
Vesnalui [34]

Answer:

 37 sorry if i calculated wrong

step-by-step explanation:

5 0
3 years ago
PLEASE HELP WILL MARK AS BRAINLIEST IF YOU ANSWER FIRST!!!!!!
vampirchik [111]
A + C
(-5, -7) is 7 units to the left of point H
(-7, 7) is more than 7 units up and left of point H
the x axis is at (infinity, 0), being only 7 points up from point H
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3 years ago
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