3(4) Solve 3(x-9)=21
2 answers:
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Answer:
12 hours
Step-by-step explanation:
Create a proportion where x is how long the 21 cm candle can burn for:
=
Cross multiply and solve for x:
14x = 168
x = 12
So, the 21 cm tall candle can burn for 12 hours
In a right angle, the sum of the squares of the two shorter sides is equal to the square of the longest side.
Here, the longest side is 25, the shorter sides are x and x+5.
The length of a side must be a positive number, so x=15.
The answer is C.
Here, the longest side is 25, the shorter sides are x and x+5.
The length of a side must be a positive number, so x=15.
The answer is C.