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Digiron [165]
3 years ago
13

Please help!!

Mathematics
1 answer:
Kryger [21]3 years ago
5 0
Switch y=2x+7 to 2x-y=-7 then multiply that equation by 2 to cancel out the y's. that ends up as 4x-2y=-14 which then you get x=-24. then you substitute x into one of the original equations y= 2(-24)+7 which equals y=-41
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The average time between infection with the AIDS virus and developing AIDS has been estimated to be 8 years with a standard devi
Dahasolnce [82]

Answer:

1/40

Step-by-step explanation:

3 0
2 years ago
Find the difference.<br><br> (5x2 - 3x + 7) - (3x2 + 4x - 5)
Katena32 [7]

Answer:

16-7x

Step-by-step explanation:

10x-3x+7-6-4x+5

16-7x

7 0
3 years ago
Read 2 more answers
Select the correct answer. Which of the following is a solution to 4sin2x − 1 = 0? A. 30° B. 60° C. 90° D. 120°
vesna_86 [32]

Answer:

The correct option is A.

Step-by-step explanation:

The correct form is:

4sin^2 x − 1 = 0

First step is add 1 to both sides:

4sin^2 x-1+1=0+1

4sin^2 x=1

Now to eliminate 4 divide both sides by 4

4sin^2 x/4=1/4

sin^2 x=1/4

Take square root at both sides

√sin^2 x = √1/4

sinx = 1/2

Thus the correct option is 30° ....

6 0
3 years ago
Read 2 more answers
The slope of the line that contains the points (2, 14) and (3, 20) is 6. What is the y-intercept?
boyakko [2]

Answer:

B. 2 [0, 2]

Step-by-step explanation:

Plug the coordinates into the Slope-Intercept Formula. It does not matter which ordered pair you choose:

20 = 6[3] + b

18

2 = b

y = 6x + 2

__________________________________________________________

14 = 6[2] + b

12

2 = b

y = 6x + 2

** You see? I told you that it did not matter which ordered pair you choose because you will always get the exact same result.

I am joyous to assist you anytime.

8 0
3 years ago
52 inches to feet and inches
Alex777 [14]
4 feet 4 inches is the answer.. 12 inches in a foot
8 0
3 years ago
Read 2 more answers
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