the cost of a pair of shoes after a 6% sales tax is added, is $320.00. What is the original price of the pair of shoes?

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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pls mark as brainliest

the answer will be b x² +x-1

step-by-step explanation:

7

step-by-step explanation: