15 class rooms
300 divided by 12 is 25, so if there is 12 class rooms for 300 and you need 75, 25*3 is 75
12+3 is 15:)
The resulting expression is -9.661
<h3>Solving by substitution</h3>
Given the expression below;
-a+(-b)
Given the following
a = 6.05
b = 3.611
Substitute the given parameters into the formula
-a+(-b) = -6.05 + (-3.611)
-a+(-b) = -6.05 - 3.611
-a+(-b) = -9.661
Hence the resulting expression is -9.661
Learn more on substitution method here; brainly.com/question/22340165
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Answer:16.50
Step-by-step explanation: hope it helps
Step-by-step explanation:
hope you can understand
Answer:
12
Step-by-step explanation:
To solve this, we need to apply the rule that (a × b)ⁿ = aⁿ × bⁿ
In other words, if we multiply two numbers that are raised to same power, we will get the same value as their product raised to that power.
In the case of 18, if we break it down to primary factors, we get:
3 × 3 × 2
= 3² × 2
To get a perfect cube, we need each of those factors to become a perfect cube as well. To do that we simply multiply by:
3 × 2² (which equals 12)
giving us:
3² × 2 × 3 × 2²
= 3³ × 2³
If we solve that we get:
= 27 × 8
= 216
which is the cube of 2 × 3, or 6³.
So the number you had to multiply by was 12.