The sum of two numbers
x + y = 21
x = smaller number
y = larger number
Larger Number = y = (2x -6)
Substitute (2x - 6) for y
x + y = 21
x + (2x - 6) = 21
3x - 6 = 21
3x = 21 + 6
3x = 27
3x / 3 = 27 / 3
x = 9
Smaller number = x = 9
Find the larger number by inserting 9 into (2x - 6)
(2x - 6)
(2(9) - 6)
18 - 6
12
So
x = 9
y =12
Check our answer by inserting x = 9 and y = 12 into x + y = 21
x + y =21
9 + 12 = 21
21 = 21
So since we have 21 = 21 we know our answer is correct.
Answer:
15
Step-by-step explanation:
A= 
r^2
A1= * 36^2
A1= * 1296cm^2
A2= * 54cm^2
1296/54= 
15 digreese
No the line will be vertical on point one
Here are the steps to solve the equation. Good luck!
Answer:
40 mph.
Step-by-step explanation:
Hope I helped!
x-5=speed of car B
x=speed of car A
distance=speed times time
(x-5)(4.5)=(x)(4)
4.5x-22.5=4x
Multiply both sides by 2 to get rid of the decimals.
9x-45=8x
Subtract 8x from each side.
x-45=0 9 (A)
Add 45 to both sides.
x=45
Speed of car A=45 mph
Speed of car B=40 mph
