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3 years ago

5

The amount of sales tax on a clothing purchase is directly proportional to the purchase price of the clothing. The sales tax on

a $60 sweater is $4.20. Determine the constant of variation (sales tax percentage). please show work.

1 answer:

evablogger [386]3 years ago

6 0

the answer is 7% or 0.07 7%= sales tax percentage

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I only need someone to put it in the quadratic formula I already have solutions. Please answer ASAP!!! I will give brainliest!!!

KengaRu [80]

The quadratic formula is $\frac{-b+-\sqrt[2]{b^2-4ac}}{2a}$

and in the equation ax^2+bx+c=0

so now all you have to do is substitute the numbers into the quadratic formula

7 0

2 years ago

A runner covers 55 yards in 5.5 seconds. Find the runner's average speed in miles per hour.

marusya05 [52]

$V=\frac{s}{t},where\ V-speed,\ s-distence\ ,t-time\\\\V=\frac{55y}{5,5s}=10\frac{y}{s}=10\frac{0,000568m}{\frac{1}{3600}h}=\frac{0,00568m}{\frac{1}{3600}h}=0,00568\cdot3600\frac{m}{h}=\\\\=20,448\frac{m}{h}$

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3 years ago

What could this answer be??

bekas [8.4K]

The number in the parentheses is the rate of change. Because this number is less than 1 it is a decrease, so it is a decay.

The percent decrease is 1 - 0.63 = 0.37 = 37% decrease

5 0

3 years ago

PLEASE HELP I need the answer for this ASAP pleaseeeee

True [87]

Answer:

13

Step-by-step explanation:

$f(x) = 5 \sqrt{x} + 8 \\ f(1) = 5 \sqrt{1} + 8 \\13$

Hope this helps..

3 0

3 years ago

Use the dchnition of similarity to solve the following problem.

sveta [45]

Answer:

1063 ft

Step-by-step explanation:

For shadow problems, we assume the sun's rays are parallel, so the triangles formed are similar. That means the ratio of height to shadow length is the same for each object.

h/(580 ft) = (5.5 ft)/(3 ft)

h = (5.5 ft)(580/3) ≈ 1063 ft

The height of the monument is about 1063 feet.

8 0

2 years ago