Solve for all the missing side lengths of a triangle

12 + 3y - 8 - 7y = ?

John ran the 100-m dash with a time of 9.93 sec. If this pace could be maintained for an entire 26-mile marathon, what would his time be?,

Determine the absolute value of the following expression 2 (3-8) + 8

Dana knits 11 centimeters of scarf each night. How many nights will Dana have to spend knitting in order to knit a total of 22 centimeters of scarf?

Imani sells shirts packed in boxes that are each 15in. x 10in. x 2in. Imani stacked 3 boxes and wrapped them with one piece of paper. How much paper did she use, not including overlap?

The delivery truck for Hall's Department Store left the mall at 10:00 a. m. it was gone for 7 hours. when did it return

At the beach, 20% of people are on the boardwalk and 23% are on the sand. If the rest are in the water, what percentage of people are in the water?

What is the equation of slope=-8/5, y intercept = 4

Select the correct answer. Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What is this number expressed in scientific notation? A. 4.2E6 B. 4.2E-6 C. 42E6 D. 4.2E5 E. 4.2E-5

Kip is going to meet his family. Predict the number of kilometers that will remain after 7 hours. The table shows the number of kilometers he needs to travel until he reaches them. Enter the correct answer.