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ZanzabumX [31]
3 years ago
11

Solve the system by substitution. y = 2x 3x + 2y = 21

Mathematics
1 answer:
7nadin3 [17]3 years ago
8 0
Y=2x
3x+2y=21
3x+2(2x)=21
3x+4x=21
7x=21
x=3
y=2(3)
y=6
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AlekseyPX
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3 0
3 years ago
on February 18th from 9 a.m. until 2 p.m. the temperature goes from -14 degrees Fahrenheit to 36 degrees Fahrenheit what is the
galina1969 [7]
To find the total increase, we will subtract -14 from 36.
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3 0
3 years ago
Number 3 please!!!<br><br><br> Best answer I will mark as brainliest
wolverine [178]
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3 0
3 years ago
I need help with this plz
Ksju [112]

Answer:

The correct answer is D. 10.

Step-by-step explanation:

If Brandy earns 2 stars for every goal, and she scored 8 goals, then we need to multiply 8 by 2.

8 x 2 = 16

She looses 1/2 a star for every miss, and she missed the goal 12 times. Therefore, we need to multiply 1/2 by 12.

12 x 1/2 = 6

Therefore, Brandy lost 6 stars.

Now, we need to subtract the amount of stars Brandy earned by the amount that she lost.

16 - 6 = 10

Therefore, the correct answer is D. 10.

Hope this helps! :D

5 0
3 years ago
10 points !!!!
Veronika [31]

Answer:

y = 13.50x + 20

y = 17x + 6

The cost is the same after 4 hours.

Step-by-step explanation:

I don't really know what to say except you just have to replace x with 4 and then work it normally from there.

4 0
3 years ago
Read 2 more answers
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