Answer:
15) 20.4
16) 40.4
17) 2.5
18) 32
Step-by-step explanation:
15) Use the calculator: 42.7/11.1*5.3
16) Use the calculator: 121.1/3
17) Use the calculator: 32.5/ (42.9/3.3)
18) 28.8/ (1.8/2)
Answer:
22.5° and 67.5°
Step-by-step explanation:
The sum of complementary angles equal 90°.
Given that one of the complementary angles is 3 times larger than the other, let "x" represent the other angle.
Thus, the following expression can be written to represent this case:

Solve for x

Divide both sides by 4


The measure of the complementary angles are:
x = 22.5°
3x = 3(22.5) = 67.5°
In algebra, symbols are used to represent numbers. Example: 5x=20 or 4x=24
Slope intercept: y = mx + b
Plug in the slope
Y = -3/2x + b
Plug in the point
-9 = -3/2(10) + b, b = 6
Equation: y = -3/2x + 6
Answer:
y = 4/7x + 13/7
Step-by-step explanation:
m = 3+1/2+5 = 4/7
i used the coords (-5, -1)
y + 1 = 4/7 (x+5)
y + 1 = 4/7x + 20/7
y = 4/7x + 20/7 - 1
y = 4/7x + 13/7