Which equation means seven times a number is equal to 21?

a. 21 7 = n

b. 7 * 21 = n

c. 7 n = 21

d. 7 * n = 21

Twice a number increased by 3 is 45. What is the number?

Leah cut a 7 1/2 piece of ribbon into pieces that are 3/4 of an inch long. How many pieces did she cut?

Simplify the following: (3a^4b^2c) 5 Group of answer choices: 243a^20b^10c^5 3a^20b^10c^5 81a^9b^7c 243a^4b^2c

After a concert for 1,600 people, only 8 people said they would not go to see the band again. What percent of the people who went said they would not go to see the band again? A. 200 B. 50% C. 8% D. 0.5%

Green's Grocery sampled 730 shoppers to determine their interest in buying fresh fish. Of the people surveyed, 222 said they would buy fresh fish.

Write a rule that represents the function. The ordered pairs are (0,0) (1,0.5) (2,2) (3,4.5) (4,8)

What is 9:630 and can you explain and show your work?

What is the interest earned on $400 invested at the rate of 6% for one year?

How many solutions are to 2x - 5y=17 6x-15y=51

What does it mean if a quotient is undefined? (1.5/2.4) ?