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o-na [289]
1 year ago
9

PLEASE HELP TIMER!!!!!!!!!!!!!

Mathematics
1 answer:
xz_007 [3.2K]1 year ago
5 0

Answer:

Answer: -3/2

Step-by-step explanation:

#KEEPSAFE

#GOODLUCK

#STUDYWELL

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Can someone help me PLZ! I keep posting the same question and no ones helping me :((((((((((((
kipiarov [429]

Answer:

Multiply x + y = 3 by 3 and add it to -3x - 2y = -7

Step-by-step explanation:

When using elimination to solve a system of equations, you multiply one equation by some number. The reason for doing this is that when you add it to the second equation, you want one variable to cancel out. When one variable cancels out (in this case x), you can solve for the other variable (in this case y). I will show this:

3(x + y = 3) = 3x + 3y = 9

   3x +  3y =  9

+ -3x + -2y = -7

---------------------------

              y  = 2

Now, knowing that y = 2, you can substitute y=2 into either equation to solve for x.

-3x - 2(2) = -7

-3x -4 = -7

-3x = -3

x = 1 | to double check (1, 2) as your answer plug these values into both equations

Finding this solution would not have been possible if not for cancelling out the x's above. The other three are wrong because none of the other options cancels out one of the variables.

3 0
3 years ago
PLEASE HELP ME!! I AM TAKING A TEST AND I NEED TO KNOW THE ANSWER!!!! GIVING BRAINLIEST
Sloan [31]

Answer:

Yes

Step-by-step explanation:

Both angles can be 90 degrees

4 0
3 years ago
Read 2 more answers
You can set up a proportion:
nadya68 [22]

Answer:

15/30:2/30

15/30=2/30x

divide by 15/30

7.5 is x

Step-by-step explanation:

7 0
2 years ago
BRAINLIEST ASAP! PLEASE HELP ME :)
WITCHER [35]

Answer:

sin⁴x - sin²x

sin²x(sin²x - 1)

(1 - cos²x)(1 - cos²x - 1)

(1 - cos²x)(-cos²x)

-cos²x + cos⁴x

cos⁴x - cos²x

4 0
3 years ago
When a number is added to 1/5 of itself, the result is 24. The equation that models this problem is n + 1/5n = 24. What is the v
Zielflug [23.3K]
The answer is 20 since 1/5 of 20 is 4, and 20 + 4 = 24.
7 0
3 years ago
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