I am thinking of a number. when it is increasd by 7, it equals 21. what is my number

a. n=28

b. n=14

c. n=7

d. n=147

Unit rate of 12 in 4

There are 5 students in the paintings school. each student painted 7 painting. some painting were sold in an exhibition. 15 were sold to a museum, 18 were sold to a rich man and the remaining painting were kept at the school.

Donna buys candy that costs $5 per pound. She will spend less than $30 on candy. What are the possible numbers of pounds she will buy?

Solve for x: 7 : x = 21 : 24

Ellie wanted to know how much her mother spent on groceries weekly, so she saved each week's receipt for a whole year. Which measure of central tendency should be used to calculate the average amount spent per week? A. range B. mode C. mean D.

If x=2 y=9 and z=-5 what is 2 (y+z) (y+z) 3 and (x+y) 2

Which shows a way to take apart 8? 9-9=0 or 9-8=1 or 8-1=7 or 8+8=16 which one

4 batches of punch each batch has 16 fluid oz lemon juice and 4 pints of orange juice if each serving is 1 cup how many servings did it make all together

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If tan 0 = - 3/8 which expression is equivalent to cot0?