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alex41 [277]
2 years ago
5

Pleaseeee helpppppppppp

Mathematics
1 answer:
Georgia [21]2 years ago
3 0

Answer:

A

Step-by-step explanation:

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What is the solution for the system of equations? Use the substitution method to solve. 2x+y=20
slava [35]

2x + y = 20

-5y = -6x + 12


To use the substitution method, first isolate one of the variables in one of the equations.

Isolate the "y" in the first equation (because it is the easiest to isolate), and substitute it into the second equation:

2x + y = 20     Subtract 2x on both sides

y = 20 - 2x


-5y = -6x + 12   (since y = 20 - 2x, you can substitute 20 - 2x into y)

-5(20 - 2x) = -6x + 12       Multiply -5 into (20 - 2x)

-100 + 10x = -6x +12      Add 100 on both sides

10x = -6x + 112        Add 6x on both sides

16x = 112           Divide 16 on both sides

x = 7


Now that you have found x, you can substitute 7 into x for one of the original equations:

2x + y = 20

2(7) + y = 20

14 + y = 20    Subtract 14 on both sides

y = 6


-5y = -6x + 12

-5y = -6(7) + 12

-5y = -42 + 12

-5y = -30       Divide -5 on both sides

y = 6


x = 7, y = 6

5 0
3 years ago
What is 4 tens and 6 tenths as a decimal
Aleksandr [31]

Answer 4.6

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Need help ASAP both a and b please.
tino4ka555 [31]

Answer:

A) In 4 hours the tempature would both be the same

B) The tempature then would be 3 degreees Fahrenheit

Step-by-step explanation:

SO for the first step just make a list

In my format

x (hour): Coldspit and Frostberg in temperature

1st hour: -4.5 and 15

2nd hour: -2 and 11

3rd hour: 0.5 and 7

4th hour: 3 and 3

6 0
3 years ago
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1/2 s + 3/4 s + 1/4 s + 4
Doss [256]

1/2 s + 3/4 s + 1/4 s + 4

((2+3+1)/4)s +4

6/4 s + 4

3/2 s + 4

4 0
3 years ago
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i have 6 digits. One of my 3s is worth 300.000. The other is worth 1/10 as much. My 6 is worth 600.The rest of my digits are zer
motikmotik
The way you wrote the problem makes the answer 330,600. I think your decimals were meant to be commas. If I am wrong, please forgive me.
3 0
3 years ago
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