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MrRa [10]
2 years ago
15

Standard Form: 3x+4y=−16

Mathematics
1 answer:
Gnesinka [82]2 years ago
8 0

Answer:

i know the answer

Step-by-step explanation:

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Use the substitution method to solve.
lord [1]

Answer:

x = 7, y = 6

Step-by-step explanation:

solve for y for the first equation

2x + y = 20

-2x         -2x , eliminate 2x

y = 20-2x

now that we have found y, substitute the y in for the second equation

-5y = -6x + 12

-5(20-2x) = -6x + 12, we just changed y into 20-2x. remember that we are multiplying all of 20 - 2x by -5

-100+10x = -6x + 12, we multiplied everything from the parathesis  by -5

+100                 + 100, eliminate -100

10x = -6x + 112

+6x    +6x , eliminate 6x

16x = 112 , solve for x

x = 7

then y = 20 - 2x = 20 - 2*7 = 6

check:

2 * 7 + 6 = 20

20 = 20

-5 * 6 = -6 * 7 + 12

-30 = -42 + 12

-30 = -30

4 0
3 years ago
Please help solve
Veronika [31]
The answers to the first two systems of equations

3 0
2 years ago
If one side of a triangle is one-third the perimeter, the second side is one-fifth the perimeter, and the third side is 7 meters
-Dominant- [34]
7 + 7(1/3) + 7(1/5)
= 10 11/15 m
 
4 0
3 years ago
Math question...?
hoa [83]
We have \sqrt{x}  \ \textless \  16 ;; where x >= 0;
Then, ( \sqrt{x}) ^{2} \ \textless \   16^{2} ;
Finally, 0 < x < 256;
The correct answer is A.
3 0
3 years ago
Pls answer , thank you
sweet [91]

Answer:

2.1

Step-by-step explanation:

Substitute 6 instead of x To get 18/(6+5e^-0.6)

solve the equation to get 2.06

round to nearest tenth to get 2.1

7 0
3 years ago
Read 2 more answers
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