Chang wants to spend at least five and a half hours preparing for a test. If he studies for 40 minutes every day for a week, which of the following is true? A. Chang studied for a total of 5 hours and 50 minutes, which is enough. B. Chang studied for a total of 4 hours and 50 minutes, which is not enough. C. Chang studied for a total of 4 hours and 40 minutes, which is not enough. D. Chang studied for a total of 5 hours and 40 minutes, which is enough.

C

Step-by-step explanation:

40 minutes every day for a week is 40 multiplied by 7, which is 280. Dividing that by 60 is 4 remainder 40, so 4 hours and 40 minutes.

no, the equation would be invalid since they are both not equal.

step-by-step explanation:

here you got

4y-6+4y 2-9

first, you would simplify the equation on the form.

4y-6+4y 2-9

then, move all the terms that contains a y to the left and all the other terms to the right.

+4y-4y+-9-6

finally, you will simplify the left and the right side of the equation.

y=-3

the two may have that, even a breakdown is probably offered