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3 years ago

8

Ronald brought a jacket on Friday that had original price if $45. It was on sale at 10% off its original price. Which formula sh

ows what Ronald paid after 7% sales tax was added?
A. 1.07(45-10)
B. 1.03(45)
C. 1.07(45-45(.1))
D. 1.1(45-45(.7))

1 answer:

trapecia [35]3 years ago

3 0

The answer is D 1.1(45-45(.7))

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7 A triangle is right-angled if the sides are a = m2 − n2, b = 2mn and c = m2 + n2 where m and n are positive integers, and m &g

Karo-lina-s [1.5K]

The general formula for the sides of right triangle is
a² + b² = c²

Subtitute the equation of a and b to the formula a² + b², evaluate if the answer will be the same as the equation of c²

a² + b²
= (m² - n²)² + (2mn)²
= (m² - n²)(m² - n²) + (2mn)(2mn)
= (m⁴ - 2m²n² + n⁴) + 4m²n²
= m⁴ + 2m²n² + n⁴

Factorize the result
m⁴ + 2m²n² + n⁴
= (m² + n²)(m² + n²)
= (m² + n²)²
= c²

It's proven by the formula that c² = (m² + n²)²
so the c will be m² + n²

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3 years ago

What is 109 times 15?.. but then u divide it by 25 then lastly add it to 555!! Could someone answer that for Meh?...

storchak [24]

620.4
hope this helps you

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2 years ago

Read 2 more answers

5cm<br> 2cm<br> 8cm<br> Volume of 3D shape

11Alexandr11 [23.1K]

Answer:

80 cm^3 (cm cubed)

Step-by-step explanation:

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3 years ago

The area of a rectangle is 105 square units. Its width measures 7 units. Find the length of its diagonal. Round to the nearest t

mezya [45]

Answer:

16.6

Step-by-step explanation:

The rectangle has an area of 105. It's width is 7.

1: Find the length

$\frac{area}{width}$ =length

$\frac{105}{7}$ = 15

Length=15

2: Pythagorean theorem

$a^{2} +b^2=c^2$

$7^{2}$ + $15^2=c^2$

49+225= $c^2$

275= $c^2$

$\sqrt{275}$ = $\sqrt{c^2\\}$

16.55≈c

Rounded to nearest tenth

16.6

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3 years ago

Anyone know the answer?

aleksklad [387]

I want to say it’s the second one

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3 years ago