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3 years ago

The price of a radio was $20. It is on sale for $15. What is the percent of change in the price of a radio?

Mathematics

1 answer:

ki77a [65]3 years ago

4 0

Answer:

15%

Step-by-step explanation:

set up 15/20= x/100

cross multiply to solve for x

1500=20x

x= 75

15 dollars is 75% of the original price, so there was a 15% change

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DerKrebs [107]

Answer:

Step-by-step explanation:

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4 years ago

Which graph best represents -5y = -6x + 15

frutty [35]

Answer: Option c.

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

$y=mx+b$

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Given the equation:

$-5y = -6x + 15$

Solve for "y" in order to write in Slope-Intercept form:

$y = \frac{-6}{-5}x + \frac{15}{-5}\\\\y = \frac{6}{5}x -3$

Now you can identify that that the slope and the y-intercept are:

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A posive slope means that the the line moves upward from left to right.

With this information, you can conclude that the the graph that best represents the given equation is the graph shown in the Option c.

3 0

3 years ago

What is one tenth of 0.5

Paraphin [41]

0.5 x 1/10 = 0.05 All you do is multiply

8 0

3 years ago

Marvin marked off the ground for a rectangular garden. The garden was to have an area represented by the polynomial expression 2

mafiozo [28]

Answer: 621

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8 0

3 years ago

suppose that the number of bacteria in a certain population increases according to a continuous exponential growth model. A samp

Tema [17]

Answer:

3.33% per hour

Step-by-step explanation:

Use the A=Pe^rt equation. A is the end amount, so it's 1892. P is the original amount, 1700. E is a constant, around 2.72. R is the growth constant. T is the time that passed, 3 hours. You can substitute the givens into the equation and get 1892=1700e^(3r). Divide by 1700 to isolate the e. This leaves you with 1892/1700=e^(3r). Do the natural log of each side cancel the e and bring the exponent down. This leaves you with ln(1892/1700)=3r. Divide by 3 to isolate r. ln(1892/1700) is .1. .1/3 is .03333. Multiply by 100 to get a percent. 3.33 percent is your final answer.

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3 years ago