Question

Malcolm has $638.54 in his checking account. He must maintain a $500 balance to avoid a fee. He wrote a check for $159.50 today. Write and solve an inequality to solve for the least amount of money he needs to deposit to avoid a fee.

638.54 + 159.50 − x ≥ 500; x ≥ $298.04

638.54 + 159.50 − x ≥ 500; x ≥ $298.04

638.54 − 159.50 + x ≥ 500; x ≥ $20.96

638.54 − 159.50 + x ≤ 500; x ≤ $20.96

Answer 1

My answer is , 638.54 − 159.50 + x ≥ 500; x ≥ $20.96. Am I right ?

Answer 2

yes!!! u r correct :-)

Answer 3

Yay!

Answer 4

Eduardo solved the following inequality and his work is shown below:

−5(x + 4) + 21 ≥ −3 + 4(x − 8)
−5x − 20 + 21 ≥ −3 + 4x − 32
−5x + 1 ≥ 4x − 35
−9x ≥ −36
x ≥ 1

What mistake did Eduardo make in solving the inequality?

When dividing by −9, he did not change the ≥ to ≤.

He subtracted 4x from both sides when he should have added 5x.

He subtracted 1 from both sides when he should have added 36.

He did not make a mistake.

My answer is, When dividing by −9, he did not change the ≥ to ≤. Correct ?

Answer 5

u r correct again!