Lets say the number is x so we can make an equation
If is at least 21, that means it has to be greater then or equal to it.
6+5*x>=21
You can subtract 6 from both sides
5*x>=15
Then divide both sides by 5
x>=3
You can conclude that the number is greater then or equal to 3.
Answer:the acute angle is the small angle which is less than 90°. I
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
1. First, let's take any two points from the graph. For this case, I'm going to take (3,0) and (0,-3).
2. To find the slope given two points, we have to apply the formula 
and plug in the corresponding values:
Therefore, the slope is 1!
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Answer:
B
Step-by-step explanation:
5t^2-(3-6t-8t^2)
=5t^2-3+6t+8t^2
=13t2-3+6t
