Answer:
x = 44
Step-by-step explanation:
This is a 2-step linear equation. Add the opposite of the constant (the one on the side with the variable term), then multiply by the inverse of the coefficient of the variable.
Add 5, then multiply by 4.
x/4 -5 = 6 . . . . . given
x/4 = 11 . . . . . . . add 5
x = 44 . . . . . . . . multiply by 4
3x-3=-12
3x=-9
X=-3
I am in calculus. Algebra is easy
9514 1404 393
Answer:
85 km/h
Step-by-step explanation:
Let s represent the speed of the slower car. Then the travel time is ...
time = distance/speed
2 = 360/(s +(s+10))
4s +20 = 360 . . . . . multiply by 2s+10
4s = 340 . . . . . . . . . subtract 20
s = 85 . . . . . . . . . . . divide by 4
__
The rate of the slower car is 85 km/h.
Area of a circle= pi*r^2
r^2= 10^2= 100
100*pi is the area of the whole circle. Since it is a semicircle, divide it in half.
100*pi/2= 50*pi
Final answer: 50*pi cm^2