Maria = x
Tom = y
Use substitution
x+y=30
2y=x
2y+y=30
3y=30
y=10
Tom is 10 years old.
x+y=30
x+10=30
x=20
Maria is 20 years old.
If the total amount of points in a test is 140, and we want to find 10% of those points, we can do the following to figure out how much points the question is worth...
140 points x 10% = 140 x 0.1 = 14 points for the short-answer quesion.
Answer:
.90
Step-by-step explanation:
?
Answer:
the answer is 0.6 there is prob a glitch in th system or we r doing something wrong
Step-by-step explanation:
Yes because they both give you an x =2 and a y=-4
