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2 years ago

The price of a pair of jeans is $30. The original price of the jeans was $45. What was the percent discount?

Mathematics

1 answer:

Juliette [100K]2 years ago

6 0

Answer:

33% discount

Step-by-step explanation:

15$ is the amount that was taken off so now we just need to convert it to a % of 45

45/100 = 30/?

if you do cross multiplication and multiply 30 * 100 then divide the result (3000) by 45 you get 66

This means that 30$ is 66% of 45. To find the discount you just subtract 66% (this represents your 30$ new price) from 100% (this represents the 45% original price) and you get 33%.

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The graph of a quadratic function passes through the points (-1,0), (-2,0), and (0,2). Write the quadratic function in general f

ddd [48]

Answer:

$f(x)=x^2+3x+2$

Step-by-step explanation:

step 1

we have the points

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Plot the points

using a graphing tool

see the attached figure

The graph of a quadratic function must be a vertical parabola open upward

The vertex is a minimum

The quadratic function in general form is equal to

$f(x)=ax^2+bx+c$

Substitute the value of x and the value of y of each given ordered pair in the general equation and solve for a,b and c

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For x=0, y=2

substitute

$2=a(0)^2+b(0)+c$

$c=2$

(-1,0)

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substitute

$0=a(-1)^2+b(-1)+2$

$0=a-b+2$ ----> $a=b-2$ ----> equation A

(-2,0)

For x=-2, y=0

substitute

$0=a(-2)^2+b(-2)+2$

$0=4a-2b+2$ ----> equation B

we have the system

$a=b-2$ ----> equation A

$0=4a-2b+2$ ----> equation B

substitute equation A in equation B

$0=4(b-2)-2b+2$

solve for b

$0=4b-8-2b+2$

$2b=6$

$b=3$

Find the value of a

$a=3-2=1$

therefore

The quadratic function in general form is equal to

$f(x)=x^2+3x+2$

see the attached figure N 2 to better understand the problem

7 0

3 years ago

Match each time with a time in the box.

BigorU [14]

If you would like to match each time with a time above, you can do this using the following steps:

a 3h 18m 7s = 11887s
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b 8300min = approximately 5 days 18 hours
8300min = 8300 * 60s = 498000s
8300 min / 60 min = 138h 20min; 138h / 24h = 5 days 18 hours 20min

c 1461 days
1461 days = 1461 * 24 hours = 35064 hours

d 44640min. = 31 days
44640min / 60min = 744 hours; 744 hours / 24 hours = 31 days

e 10:21:2.5
10:21:2.5 = 10 hours, 21 minutes, 2 seconds, 50 milliseconds

7 0

2 years ago

To make rice, you mix 1.5 cups of water for every 1 cup of dry rice. This will make 2 servings. How many cups of dry rice and ho

dalvyx [7]

Answer:

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Step-by-step explanation:

In total 1.5 water and 1 cup rice will equal 2 servings. If you are serving 10 people, you need to multiply each by 5.

6 0

2 years ago

6.) ? Need help with the steps

Law Incorporation [45]

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sammy [17]

Step-by-step explanation:

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2 years ago

Read 2 more answers

The price of a pair of jeans is $30. The original price of the jeans was $45. What was the percent discount?​

The price of a pair of jeans is $30. The original price of the jeans was $45. What was the percent discount?