How are numerical expressions and algebraic expressions different

A student needs to collect exactly 20 insects for a science project. The student has already collected 13 insects. Write an equation that can be used to find n, the number of insects the student still needs. A. 13n = 20 B. n - 13 = 20 C.

What is O. 5 is 10 times as great as

14 cm 6 cm 4 cm What is the surface area

the price of a tent was decreased by 15% and sold for 76.49. What was the original price of the tent in dolars?

Does someone know a factor of 69 other than 1 and 69. And does someone know a factor of 62 other than 1 and 62 And a factors of 98 other than 1,98

The ratio of girls to boys in the assembly was 5 to 3. If 160 students were in the assembly, how many girls were there?

John took all his money from his savings account. He spent $72 on a radio and two thirds of what was left on presents for his friends.

During a spacewalk on February 9, 1995, astronauts Bernard Harris, Jr. and Michael Foale worked in the shadow of shuttle Discovery.

Anna has been adding $30 to her savings account every month. Which model could represent the money in Anna's savings account (y) after x months? A) B) C) D)

What is the graph of y - (-3) = - 1/2 (x - (0)) ?