Answer:
Domain { 0 ≤ r≤ 18}
Range = {0≤ c ≤ 31.5}
Step-by-step explanation:
The domain is the values that r can take
He can goes on each ride up to 1 time
R can be from 0 rides to 18 rides since there are only 18 rides
Domain { 0 ≤ r≤ 18}
The range is the output
If r = 0 then he spends no money
if r =18 then 1.75*18 =31.5
Range = {0≤ C(r) ≤ 31.5}
Answer:
x=0.5 y=4
Step-by-step explanation:
Let's solve your system by substitution.
2x+0.5y=3;x+2y=8.5
Rewrite equations:
x+2y=8.5;2x+0.5y=3
Step: Solvex+2y=8.5for x:
x+2y=8.5
x+2y+−2y=8.5+−2y(Add -2y to both sides)
x=−2y+8.5
Step: Substitute−2y+8.5forxin2x+0.5y=3:
2x+0.5y=3
2(−2y+8.5)+0.5y=3
−3.5y+17=3(Simplify both sides of the equation)
−3.5y+17+−17=3+−17(Add -17 to both sides)
−3.5y=−14
−3.5y
−3.5
=
−14
−3.5
(Divide both sides by -3.5)
y=4
Step: Substitute4foryinx=−2y+8.5:
x=−2y+8.5
x=(−2)(4)+8.5
x=0.5(Simplify both sides of the equation)
Answer:
x=0.5 and y=4
The fourth answer is right as it uses both variables and values correctly
2.5, 1.5, 0, -0.5, -1/3, -1
Answer: x=17
Step-by-step explanation:
4x - 64 + x = 21
4x+x=64+21
5x=85
x= <u>85</u>
5
x=17