Answer:
x=10
Step-by-step explanation:
1/2x+4=9
subtract 4 from both sides
1/2x=5
multiply both sides by 2 to get x by itself
x=10
The answer is 76.99 but rounded would make it 77.00 which is C
we know that
The volume of the prism is equal to

where
B is the area of the base
h is the height of the prism
Step 1
<u>Find the area of the rectangular base</u>
we know that
the area of a rectangle is equal to

In this problem we have



Step 2
<u>Find the height of the prism</u>
Applying the Pythagoras Theorem

solve for h



Step 3
<u>Find the volume of the prism</u>
The volume of the prism is equal to

substitute the values

therefore
<u>the answer is</u>

20.70-23.80=x+y= year three and x equals how much they make per a year...
Glad I could help:)
Number of swings = x
Number of slides = y
First condition:
number of slides must be more than 3 times number of swings
This means that: y > 3x
Second condition:
each swing cost 275$ and each slide costs 168$. They cannot spend more than 1250$. This means that the sum of costs of swings and slides should not exceed 1250$ (should be less than or equal to 1250$)
This means that: <span>275x+168y ≤ 1250
Based on this:
The correct choices are: b and d</span>