the amount of sales tax on a clothing purchase is directly proportional to the purchase price of the clothing. the sale tax on a $60 sweater is $4.20. determine the constant variation (sales tax percentage).

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  7%

Step-by-step explanation:

The tax rate is the ratio of tax to pre-tax cost:

  $4.20/$60.00 = 0.07 = 7%

The constant of variation (tax rate) is 7%.

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this

y=mx+b

step-by-step explanation:

m slope

b y-intercept