Supplementary angles by definition means the sum is 180.
From that knowledge we can write up some equations.
Let angle 1 = x, and angle 2 = y
x + y = 180
"The larger of two supplementary angles measures 20° less than four times the measure of the smaller angle"
(Let x be the larger angle)
x+20 = 4y
Since there are two different equations, and two variables, this means we have a set of simultaneous equations.
We can solve this via the substitution method or the elimination method.
I choose to solve it via the substitution method cause of personal preference.
x + y = 180 => x = 180- y
x+20 = 4y => x = 4y - 20
Make them equal each other..
180 - y = 4y - 20
200 = 5y
40 = y
Now that we know y we can sub it into any equation to find x
x + 20 = 4y
x + 20 = 4(40)
x + 20 = 160
x = 140
So the angles are 40° and 140°
Answer:
They will be spending 224 $
Step-by-step explanation:
24x7=168
8x7= 56
168+56=224
Calculate mean:
4+3+4+5+6+6+8+4=40
40/8=5
Calculate MAD:
1+2+1+0+1+1+3+1=10
10/8= 1.25
Final answer: 1.25
Answer:
i don't understand sorry ;(
good luck
bye
Step-by-step explanation:
