In order to use substitution, you need to isolate a variable on one of the equations:
-2x+y=0
y=2x
Then you plug that equation into the other equation. Since we isolated y, we plug in 2x for y in the other equation:
3x-(2x)=5
x=5
Then plug the value you found into any equation to solve for the other variable:
3(5)-y=5
15-y=5
-y=-10
y=10
So your answers are x=5, y=10
Answer:
Factor −6x+30
−6x+30
=6(−x+5)
Step-by-step explanation:
That's all there is
He doesn't deliver any newspapers means x=0, so <span>y = 30x0 + 18=18
the answer is 18 cents</span>
Answer:
129 1/6 feet
Step-by-step explanation:
Formula for area is L*W
1. convert the mixed numbers to improper fractions
12 1/2 feet = 25/2
10 1/3 feet = 31/3
2. multiply numerator by numerator (25*31 = 775
3. multiply denominator by denominator (2*3=6
4. convert improper fraction 775/6 into a mixed number by dividing 775 by 6.
5. 775/6 = 129 r. 1 or 129 and 1/6
Question 4 the answer is 30 degrees.
Question 5 the answer is 132 degrees because angles on a straight line equal to 180 so 180-48.
Question 6: 90+25=115, 180-115=65
Question 7: 180-149= 31
