Alyssa has 18 quarters.
If she saved 9 quarters each car wash and she went through the car wash twice than 2x9 equals 18
So if $42 was 70% of the original price that means you saved 30% so work out 30% of $42 then add it to the $42 = $12.60 + $42
Y = 2x-3
x + y = 18
Since you already know what y is equal to, we can plug that in into the second equation.
x + (2x-3) = 18
x + 2x -3 = 18
3x -3 = 18
Add 3 to both sides of the equation. (By doing this, we can isolate the 3x on the left side by getting rid of the -3)
3x = 21
Divide 3 on both sides
x = 7
Friction force and train accelerating force are opposite
in direction and equal in magnitude. Therefore m x a = u x m x g
As the mass is same,
hence both are cancel out and remaining equation is
a = u x g
It’s given that a =
0.20g, so
0.20g = u x g
Cancel “g” on both
sides;
0.20 = u
<span>
Thus the coefficient
of static friction = u = 0.20</span>
Answer: wdym you have to say 13 times take away be real if someone want to help you i want to help i dont know aht you are talking about
Step-by-step explanation:
