MATHEMATICS HIGH SCHOOL

4a ^ 2 - 20ab + 25b ^ 2​

Answers

Answer 1
Answer:

Answer:

(2a-5b)^2

Step-by-step explanation:

4a^2 - 20ab + 25b^2 = (2a)^2 - 2*2a*5b + (5b)^2 = (2a-5b)^2

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Can someone please solve 10n - 3 = 7n + 21

Answers

10 n-3 = 7n+21

Add 3 to both sides :

10n-3+3=7n+21+3

10n=7n+24

Subtract  7 n from both sides:

10n-7n=7n+24-7n

3n=24

Divide both sides by 3 :

(3n)/(3) = (24)/(3)

n = 8

hope this helps!

9/x=32/56
Solve for z

Answers

Answer:

x = 15.75

Step-by-step explanation:

I'm going to assume you mean solve for x so:

(9)/(x) =(32)/(56) \n\n32x=504\nx=15.75

***Answer when you can!***

Evaluate functions from their graph

g(-4)=??

Answers

Answer:

1

Step-by-step explanation:

  • That is the y coordinate when x is -4
I’m pretty sure the answer is -4 grams :)

A line in the Cartesian plane passes through the points (–2, 4) and (2, –1). What are the rise and the run of the line

Answers

Rise (-1) - 4 = -5 
Run  2 - (-2) = 4

Answer:

The rise is -5, the run is 4.

A function is created to represent the balance on a credit card each month. What restrictions would be made to the range?A)The range would only include integers.
B)The range would only include positive integers.
C)The range would only include negative integers.
D)The range would include all real numbers.

Please, support your answer with an example.

Answers

Answer:

D)The range would include all real numbers.

Step-by-step explanation:

Range is all real number because function represent the balance on credit card each month. It may be cross over limit or lower limit.

If we purchase any goods using credit card balance will deduct from credit card and mark as negative number.

If we pay bill of credit card bill, this amount shows as positive number because any amount add to credit card.

In a month we purchased ,

 Month                                 Debit             Credit

12/9/2018                             $58.65

15//9/2018                            $42.23

23/9/2018                            $21.49

28/9/2018                                                    $180.23

Total                                     - $122.33       +$180.23

Net Balance in credit card = Debit + Credit = $57.90  

Thus, Balance on credit card would be any real number.

It could include all real numbers, really. If you have +$130 you could use them to pay for something. If you have -$27.5 you need to pay this sum to the bank, since you overused your credit.

9. When graphing, what does the y intercept describe? *The place where the line or curve crosses, or touches, the x axis

The place where a line or gurve crosses, or touches, the y axis

O I don't know.

Answers

Answer:

Every straight line can be represented by an equation: y = mx + b. ... The y-intercept of this line is the value of y at the point where the line crosses the y axis.
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