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3 years ago

I need help!!also the work has to be shown!!

Mathematics

2 answers:

Sloan [31]3 years ago

8 0

The original price was $75.

$75 - 20% = $60.

$60 + 10% = $ 66.

75 - 66 = 9.

9 / 75 × 100 = 12%.

The correct answer is C

Alina [70]3 years ago

6 0

Answer: 12%

It is important to note that the coupon is applied first THEN the fee is applied.

First, we find the percent of the price that will be paid after the coupon is applied when converted to a decimal.
100%-20%= 80%= 0.8

Now, we multiple this decimal by the original price.
75(0.8)= 60

Then, we find the percent of the price that will be paid after the fee is added when converted to a decimal.
100%+10%= 110%= 1.1

Once we found the decimal we multiply it by the price after the coupon is applied.
60(1.1)=66

66 is 88% of 75, the original price or 100%.

Subtract new price from original value.
100%-88%= 12%

If you have any questions feel free to ask. :)

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A long distance phone call between two cities costs $8.50 for 17 minutes. What is the rate in cents per minute?

Ira Lisetskai [31]

Answer:

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Step-by-step explanation:

8.50 divided by 17= 0.50

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3 years ago

The first step for deriving the quadratic formula from the quadratic equation, 0 = ax2 bx c, is shown.step 1: –c = ax2 bxwhich b

Ksju [112]

Answer:

option (b) is correct.

First step to solve for deriving the quadratic formula from the quadratic equation is completing the square.

Step-by-step explanation:

Given : the quadratic equation $ax^2+bx+c=0$

We have to find the first step for deriving the quadratic formula from the quadratic equation.

Quadratic formula is given by $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Consider the given quadratic equation $ax^2+bx+c=0$

Divide the equation by a, we get,

$x^2+\frac{b}{a}x+\frac{c}{a}=0$

Take $\frac{c}{a}$ to other side, we get,

$x^2+\frac{b}{a}x=-\frac{c}{a}$

Add $(\frac{b}{2a})^2$ to both side, we get,

$x^2+\frac{b}{a}x+(\frac{b}{2a})^2=(\frac{b}{2a})^2-\frac{c}{a}$

Thus, the left side is in the form of $(a+b)^2=a^2+b^2+2ab$

On solving, we get,

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Then solve for x , we get quadratic formula $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

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Thus, option (b) is correct.

3 0

3 years ago

Read 2 more answers

Higher Order Thinking

Sever21 [200]

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7 0

3 years ago

Ms. Johnson owns a cabinet business that installs cabinets in kitchens. Her employees can install 2/3 of a

atroni [7]

Answer:

10/3 of a kitchen cabinet

Step-by-step explanation:

To make a full hour, 1/5 would be multiplied by 5- and so would their progress.

2/3 * 5 = 10/3, which is also an improper fraction.

6 0

3 years ago

Phil sold pizza at the carnival for $1.75 a slice or $9.50 for a whole pizza he sold 76 slices of pizza and 64 whole pizzas he g

Nady [450]

Answer:

Total money he had left=629.85

Step-by-step explanation:

We can express Phil's earnings from pizza sales as;

Total earnings from pizza sales=(price per slice×number of pizza slices sold)+(price per whole pizza×number of whole pizzas sold)

where;

Price per slice of pizza=1.75

Number of pizza slices sold=76 slices

Price per whole pizza=9.50 whole pizzas

Number of whole pizzas sold=64

Replacing in the expression above;

Total earnings from pizza sales=(1.75×76)+(9.5×64)=741

Total money he had left=Total earnings from pizza sales-15% of Total earnings

where;

Total earnings from pizzas ales=741

15% of Total earnings=(15/100)×741=111.15

Replacing;

Total money he had left=(741-111.15)=629.85

8 0

4 years ago