3 years ago

21 is greater than or equal to 3(a-7) +9

1 answer:

4 0

21≥3(a-7) +9
first, just solve it like a normal equation
Distribute
21≥3a-21+9
Combine numbers
21≥3a-12
Solve like equation
33≥3a
11≥a
"a" has to be less than or equal to 11 for the inequality to be true

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3 years ago

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Answer:

1st one is not a right triangle.

2nd one is not a right triangle.

3rd one is not a right triangle.

4th one is a right triangle.

Step-by-step explanation:

1, 2, and 3 could also be "not enough information".

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