Answer:
x = 45
Step-by-step explanation:
x + 45 + 2x = 180
3x + 45 = 180
3x = 135
x = 45
Answer:
27 degrees and 63 degrees
Step-by-step explanation:
Let n be the number.
Angle 1: 2n-15
Angle 2: 3n
If the angles are complementary they add up to 90.
Therefore we can write an equation.
2n-15+3n=90
Combine like terms
5n-15=90
Add 15 to both sides
5n=105
n=21
Now we plug 21 in for n and solve for the angles
Angle 1 = 2(21)-15
Angle 1 = 42-15
Angle 1 = 27
Angle 2 = 3(21)
Angle 2 = 63
Answer:
22.4
Step-by-step explanation:
This question asks what is half of 45.
45 divided by two equals 22.5
The car will travel 22.5 miles in .5 hours.
Answer:
40
Step-by-step explanation:
2 •(3(5+2)-1)
2 ·(3(7)-1)
2·(21-1)
2·20
=40
