1.) last year, diane biked k miles. this year, she biked
516 miles. using, k write an expression for the total number of miles she biked?

2.) twice the difference of a number and 4 equals 3?

3.) 57 decreased by twice julie's savings?

4.) 153 is the product of delia's height and 9?

5.) kaitlin purchased n notebooks. they were 5 dollars each. write an equation to represent the total cost c that kaitlin paid?

1.) k + 516

2.) 2n - 4 = 3

3.) 57 - 2s

4.) 9h = 153

5.) c = 5n

Step-by-step explanation:

All of the problems given require you to set up an expression or equation.  Expressions have a variable and a coefficient or a constant.  Equations also have a variable, coefficient or constant but also include an equal sign.

1.) last year's miles = k, this year = 516, so total:  k + 516

2.) twice the difference of a number and 4 equals 3

twice a number = 2n; difference of this number and 4: 2n - 4; equals 3: =3

2n - 4 = 3

3.) 57 decreased: 57 -; twice her savings: 2s:  57 - 2s

4.) 153 is:  153 =; the product of height and 9:  9h, so 9h = 153

5.) notebooks 'n', were $5 each:  5n; total cost = c, so 5n = c

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm