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4 years ago

All I want is the work, I know the answer. (Don't ask)

Mathematics

2 answers:

bonufazy [111]4 years ago

7 0

Answer:

Part A). $15

Part B). $13.5

Step-by-step explanation:

Part A).

Rita wants to buy a sweater that was originally priced at = $25

If sweater is on sale for 40% off, price of the sweater will be = $25 - 40% of the original price

= $25-25\times{\frac{40}{100} }$

= 25 - 10

= $15

Therefore, Rita has to pay $15 before taxes.

Part B).

Rita has a coupon for an additional 10% off. Then the price of the sweater after applying coupon = $15 - 10% of 15

= $15-15\times \frac{10}{100}$

= 15 - 1.5

= $13.5

By applying discount coupon further sale price of the sweater will be $13.5

lord [1]4 years ago

4 0

The answer to part A is worked out using 10% of $25, this is just 25÷10=2.5 you then want to times that by 4 to get 10. subtract 10 dollars from 25 and that is your price

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3 years ago

Anyone know this answer?

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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4 years ago

Read 2 more answers

How would I solve this?

givi [52]

Answer:

The valid value of x is x=-2

Step-by-step explanation:

we know that

The sum of the interior angles of any quadrilateral must be equal to 360 degrees

$(7x^{2}-24x)+100+(24-46x)+(3x^{2}+56)=360$

solve for x

Combine like terms

$10x^{2}-70x+180=360$

$10x^{2}-70x-180=0$

Divide by 10 both sides

$x^{2}-7x-18=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-7x-18=0$

$a=1\\b=-7\\c=-18$

substitute in the formula

$x=\frac{-(-7)(+/-)\sqrt{-7^{2}-4(1)(-18)}} {2(1)}$

$x=\frac{7(+/-)\sqrt{121}} {2}$

$x=\frac{7(+/-)11} {2}$

$x=\frac{7(+)11} {2}=9$

$x=\frac{7(-)11} {2}=-2$

Remember that

The measure of the interior angle cannot be a negative number

For x=9

we have that the measure of one interior angle of quadrilateral is

$24-46x$

substitute the value of x

$24-46(9)=-390\°$

therefore

The value of x=9 cannot be a solution

For x=-2

The measure of the interior angles are

$(7(-2)^{2}-24(-2))=76\°\\100\°\\(3(-2)^{2}+56)=68\°\\24-46(-2)=116\°$

therefore

The valid value of x is x=-2

7 0

3 years ago

Use the diagram to help you solve the equation 4x - 12 = 16

KatRina [158]

Answer: X=7

Step-by-step explanation:

Add 12 to both sides.

Divide both sides by 4.

Then you'll get 7 for X

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