Percent Error and Change
20% 0f 800
160
A store buy a toy for $10 and marks it up 20%. What is the selling price?
$12
Find the simple interest for $100 at 10% for 1 year.
$10
5x
True or False: 3(x+2) = 3x+6
True
The percent is 20%, the amount is 30, calculate the base
150
A $50 jacket is discounted 10%. What is the sale price?
$45
Find the interest for $200 at 5% for 2 years.
$20
Evaluate: 4x+3 when x=2
11
Simplify: 2(3x+4)
6x+8
The amount is 15, the base is 60, calculate the percent
25
A store buys shoes for $40 and marks them up 25%. What is the price?
$50
How much interest is earned on $500 at 8% for 3 years?
$120
Write an expression: “5 more than twice a number n”
2n+5
Are 4x+6 and 2(2x+3) equivalent?
YeS
What number is 30% of 150?
45
A $120 coat is marked down 30%. What is the sale price?
$84
A savings account earn 6% simple interest. How much interest on $1,000 in 4 years?
$240
Simplify: 7y+3y-4
10y-4
True or False: Are 5(x+4) and 5x+4 equivalent?
False
What percent of 40 is 6?
15%
A store pays $75 for a backpack and wants a 40% markup. What is the selling price?
$105
Find the total amount after investing $2,000 t 7% simple interest for 5 years.
$2,700
Evaluate: 2a2+3a when a=3
27
Simplify: 7(y-2)
7y-14