3x-4 when x = 7 how do I do this equation I'm confused

lauren rode her bike from her house to a friend house 3 1/3 miles away. on the first leg of her trip she rode uphill at 3 miles per hour. the second part of the trip covered a larger distance but was downhill and lauren rode at 5 miles per hour.

The mass of earth is approximately 5.97 x 10^24 kilograms. The mass of Venus is approximately 4,870,000,000,000,000,000,000,000 kilograms.

Keith bought a package with 2 9 / 16 pounds of ground meat to make hamburgers. He has 2/5 pounds of ground meat left. About how many pounds of ground meat did he use for the hamburgers.

Write an expression for each statement. Then solve. 5 times the difference between 19 and 13

Which is the better buy A) 10 penceis for 50cents B) 6 penciels for 2.70

Heather saves $5.00 on Monday. Each day after that, she decides to save twice as much as she did the previous day. If she saves nothing on Friday, how much does she have saved that day?

Is 110 inches greater than 3 yards

What is 5 (-7x-1) + 8 (3x+6)

Solve for r. s=2πrh a. s/2π=r b. 2πsh=r c. s/2πh=r d. s2=r

Is The Ratio 4.2:1.5 Proportional To The Ratio 12.6:4.5? Explain