Complete the matching
1. a math sentence that uses letters and operation signs
rule
2. selling price, cost plus markup
algebraic expression
3. a reduction of the selling price
variable
asking price
4. amount added to the cost of an item to get its selling price
an equation that shows how a variable is related to other
variables
markup
6. a quantity capable of assuming any of a set of values
discount

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true