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Naddik [55]
3 years ago
8

HELP ITS A TEST- Question is in the photo

Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
7 0

Answer:

D

Step-by-step explanation:

i simply put the answer in desmos a graphing calculator and compared them hope this helps

Shalnov [3]3 years ago
6 0
The answer is d okkkkkkkkkk
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PLZ HELP I NEED THIS TO FINISH REEE PLZ ;-;<br>So would my answer be 9b^8+24b^3
andrew11 [14]

Answer: 3b^3(3b^5+8)

Step-by-step explanation:

They have a 3 in common and both expressions have at least 3 b 's

7 0
3 years ago
Hello I don’t understand question 9 a and b. Please show working out.<br> Thanks
brilliants [131]
A) I would make the positive integer x and then form an equation.

x + 30 = x^2 - 12
x + 42 = x^2
0 = x^2 - x - 42 this can be factorised
(x - 7) ( x + 6) Therefore x = 7 or x = -6

Since the question asks for a positive integer the answer is 7.

B) two positive numbers x and y.

X - y = 3
x^2 + y^2 = 117

Use these simultaneous equations to figure out each number.

Rearrange the first equation

x = y + 3

Then substitute it into the second equation.

(y+3)^2 + y^2 = 117
y^2 + 6y + 9 + y^2 = 117
2y^2 + 6y - 108 = 0
then factorise this.
(2y - 12) (y + 9)

This means that y = 6 or y = -9 but it’s 6 because that’s the only positive number.

Use y to find x

x = y + 3
x = 6 + 3
x = 9

So the answers are x = 9 and y = 6.
3 0
3 years ago
Solve |4 - 2x| = |3x+ 2|.
andreyandreev [35.5K]

Answer:

Step-by-step explanation:4 -2x=3x +2

4-2=3x+2x

2=5x

X=2/5

5 0
3 years ago
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I will give brainliest!! please help!!!
hram777 [196]

Answer:

Yes

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Step-by-step explanation:

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