Answer:
25
Step-by-step explanation:
180-45=135 and 180-135=45
360 is the sum of all angles so:
360-105-135-45=75
3x=75
x=25
Answer:
This equation has no real roots
Step-by-step explanation:
We want to solve

We group all terms on the left:


Divide through by -6

The discriminant is

This means the given equation has no real solution, since the discriminant is less than 0
$25.
25/5=5
5x4=20
4/5 x 25 = 20
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Answer: . 2 + 3b
Step-by-step explanation: Twice b is 2b. Sum of 2 and b is 2 + b. Add them all together and combine like terms. You get your answer.