NOTE; this is NOT my answer. I dont know how to do this problem, but i thought this would help you.
Man's height IS TO Man's shadow AS Tree's height IS TO Tree's shadow
Let the tree's height be x. Then we have
6 IS TO 4 AS x IS TO 18
Replace the "IS TO"'s by " / " and the "AS" by " = "
6/4 = x/18
Cross multiply:
4x = 6(18)
4x = 108
x = 27 feet
basically the tree is 27 feet
D
Dilation
I had this question on USA Testprep
Given :
Fitness center A has a $60 enrollment fee and costs $35 per month. Fitness center B has no enrollment fee and costs $45 per month.
To Find :
A) Identity the variables then write system of linear equations to represent the situation.
B) In how many months will both fitness centers cost the same? What will the cost be? Use the substitution method to solve this real-world application.
Solution :
a) Linear equation of center A :
F = 35x + 60 ...1)
Linear equation of center B :
F = 45x ...2)
b) Let, after n months both fitness centers cost the same fee :
So, 35m + 60 = 45m
10m = 60
m = 6 months
Putting value of m in equation 1) or 2) is :
F = (35×6) + 60 = $270 or F = 45×6 = $270 .
Therefore, the cost when they have same fee is $270 .
Hence, this is the required solution.
Answer: x = -3
Step-by-step explanation:
-3x = 9
9 ÷ -3 = -3
:)
I’m pretty sure d, but not sure sorry
