Answer:
x = 80.96
Step-by-step explanation:
9x * 3x +1 = 2187
27x +1 = 2187
27x = 2187-1
27x = 2186
x = 2186/27 = 80.96(2dp)
Answer:
7 fossils
Step-by-step explanation:
Find the cost for transportation by multiplying 20 by 5, since it is $5 per student and there are 20 students
20(5)
= 100
Subtract this from 128, since they raised $128
128 - 100
= 28
This means they have $28 to spend on fossils.
To find how many they can buy, divide 28 by 4, since they are $4 each
28/4
= 7
So, they can buy 7 fossils with the money they have left
Answer:
angle QPR and angle RPQ
Step-by-step explanation:
hope this helps!
Answer:
x =70
Step-by-step explanation:
The variation model we'll need here is y = kxz, where k is the constant of proportionality. We are told that when y = 105, x = 2 and z = 9. This gives us enough info with which to calculate k:
9 = k(2)(9), or 1 = 2k, or k = 1/2.
Then the governing equation is
y = (1/2)xz.
If y = 105 when z = 3, then we have 105 = (1/2)(x)(3).
To solve this for x, first multiply both sides by 2, obtaining 210 = 3x.
Finally, we divide both sides by 3, obtaining the final result x = 70
