Q.1 what is the value of x?

x−2/5=7

enter your answer in the box in simplest form.

q.2 multiplying 2.1 and the number r results in 6.174.

what is the value of r?

q.3 ellie practices piano 2/3 h per day, several days each week. she practiced piano 32 2/3 hours during the summer.

what equation can be used to find the number of days that she practiced piano during the summer?

let d represent the number of days.

q.4 when a number x is multiplied by 9, the result is 3/5 .

what is the value of x?

q.5 what is the value of x in the model below? (image will be there)

q.6 solve the equation using inverse operations. 7.25 = 0.5 x

enter your answer as a decimal in the box.

q.7 combine like terms in the following expression:

4 + 3(1−3m)

q.8 kanisha has x green apples and y red apples.

which statement explains why x + y and y + x will each find the total number of apples that kanisha has?
a. the expressions are not equivalent because there are two variables.
b. in addition, the order of the variables matters in the expression.
c. in addition, the order of the variables does not matter in the expression.
d. the first expression has a greater value than the second expression.

q. 9 each week, christian earns $x fixing bicycles and receives $10 as his allowance.

to find how much he will earn in total over 2 weeks, christian calculates :

x + 10 + x + 10

what is another way christian can calculate how much he will earn in total over the 2 weeks?