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2 years ago

15

Sally is buying new school supplies she uses a 15% off coupon on the set of markers that was originally $3 she also bought some

papers that was 20% off total Sally spent $5.35 after using her coupon how much was the original price of the paperl

1 answer:

timurjin [86]2 years ago

6 0

[(100-15)/100 * $3]
= $2.55
$5.35 - $2.55
= $2.80 |80% paper|

80/100 = 2.80/x
4/5 = 2.80/x
4x = 14
x = 3.5

Original price of the paper = $3.50

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The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent).It ranges from -1 to +1.

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2 years ago

A rectangle has a width of x centimeters and a perimeter of 8x centimeters a square has sides of length 1/4 that of the length o

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Part A) The length of rectangle is $3x\ cm$

Part B) The perimeter of the square is $3x\ cm$

Part C) $20\ cm$

Part D) $39\ cm^{2}$

Step-by-step explanation:

Part A) Find the length of the rectangle

we know that

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$W=x\ cm$

substitute and solve for L

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Part B) Find the perimeter of the square

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Part C) Find how many cm greater the rectangle's perimeter than the square's perimeter if x=4

<u>Find the value of rectangle's perimeter</u>

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<u>Find the value of square's perimeter</u>

$P=3x\ cm$ ------> $P=3(4)=12\ cm$

<u>Find the difference</u>

$32\ cm-12\ cm=20\ cm$

Part D) Find how many square cm greater the rectangle's area is than the square's area if x=4

<u>Find the value of rectangle's area</u>

$A=(3x)(x)=3x^{2}\ cm^{2}$ ------> $A=3(4^{2})=48\ cm^{2}$

<u>Find the value of square's area</u>

$A=((3/4)x)^{2}\ cm^{2}$ ------> $A=((3/4)(4))^{2}=9\ cm^{2}$

<u>Find the difference</u>

$48\ cm^{2}-9\ cm^{2}=39\ cm^{2}$

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