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cody6187
19.12.2019 •
Mathematics
2.solve the system using substitution.
2x+2y=38
y=x+3
a. (8,11)
b. (4,7)
c. (35/4, 47/4)
d. (-4,-7)
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Ответ:
y=x+3
First you would substitute the y for x+3
2x+2(x+3)=38
You would multiply the 2 by the x+3
2x+2x+6=38
Add the 2x and the 2x
4x+6=38
Subtract the 6 on both sides
4x=32
Divide the 4 on both sides
x=8
Now substitute the x in the second problum for 8
y=8+3
Add the 8 and the 3 to solve for y
y=11
Your answers
x=8
y=11
the correct answer would be A:(8,11)
Ответ:
9.2
Step-by-step explanation:
Steps
4.2-((-1)2-3)
Remove parentheses
4.2 - ( -1 *2 - 3 ) =5\
4.2+5
Add the numbers: 4.2+5=9.2
9.2