Answer:
4. x=10
5. x=15
6. x=20
7. x=4
Step-by-step explanation:
4. 50+4x=90
90-50=40
40/4=10
x=10
5. (2x+60)+6x=180
6x+2x=8x
8x+60=180
180-60=120
8x=120
120/8=15
x=15
6. 3x+30=90
90-30=60
60/3=20
x=20
7. (8x+120)+7x=180
8x+7x=15x
15x+120=180
180-120=60
15x=60
60/15=4
x=4
Answer:
10 & 12
Step-by-step explanation:
First, we set up equations:
x - y = 2
2(y) = x + 8
Then, we solve for the variable of our choice (x) in one equation:
(x - y = 2) = (x = y + 2)
Then, we substitute it for the variable (x) in the other equation:
(2y = x + 8) = (2y = (y + 2) + 8)
Then, we solve for the remaining variable (y):
(2y = (y + 2) + 8) = (2y = y + 10) = (y = 10)
Finally, we can plug the value that variable (y) into the initial equations:
(x - (10) = 2) = (x = 12)
(2(10) = x + 8) = (x = 12)
Now, we have the value of both variables:
y = 10 & x = 12
Hope this helps! Brainliest would be nice, if you can, but if not that's fine too!
Answer:
i think its c
Step-by-step explanation:
Answer:
ight so PSAT means pre-SAT. it doesn't affect your grade. an it don't affect yo chances of getting into college. they wanna see where errybody at, you still wanna do yo best. its preparing you for the SAT i took the psat when i was in 8th grade an they want you to take that shi seriously. buh dont stress about it. they give you plenty of time. im in 10th. buh you finna do great you jus gotta trust in yoself
Answer:
-22
Step-by-step explanation:
First, you must find the values for f(-8) and g(2). f(x) is the blue line so f(-8)=-2 because that is the value of y where x=-8. g(x) is the pink dotted line so g(2)=-4 because that is the value of y where x=2. Then, plug in and solve:
-3(-2)+7(-4)
6+-28
6-28
-22
Hope this helps!!
