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3 years ago

Answer all 3 for brainliest

Mathematics

2 answers:

valentinak56 [21]3 years ago

5 0

Step-by-step explanation:

1. d = 22mm

circumference = πr + d

= 22/7 × 11 + 22

= 56.57 mm

2. r = 4 inches

circumference = πr + d

= 22/7 × 4 + 8

= 20.57 Inches

3. d = 10 yards

circumference = πr+d

= 22/7 × 5 + 10

= 25.71 yards

Effectus [21]3 years ago

3 0

Answer:

πr + 2r

Step-by-step explanation:

Perimeter of Semicircle

The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.

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Manny buys a new grill that costs $375. The grill is discounted 22% and sales tax is 6.5%. How much does Manny pay for the grill

Svetllana [295]

Answer:

$310.05

Step-by-step explanation:

Method 1: Find the amount of 22% discount and subtract from original price, and find the amount of 6% tax and add to discounted price.

Original price: $375

Discount of 22%

22% of $375 = 0.22 × $375 = $82.50

Price after discount (but before tax): $375 - $82.50 = $292.50

Sales tax of 6%

6% of $292.50 = 0.06 × $292.50 = $17.55

Price after discount and tax: $292.50 + $17.55 = $310.05

Method 2: Add and subtract the discount percent and the tax percent first, then multiply.

Original price: $375

The discount is 22%.

The original price is 100%.

Subtract 22% from 100%: 100% - 22% = 78%

The discounted price is 78% of the original price.

Once you have the discounted price, tax is 6%.

The new discounted price is 100%. Add 6% to get 106%.

The price with tax is 106% of the discounted price.

106% of 78% of $375 = 1.06 × 0.78 × $375 = $310.05

Answer: $310.05

3 0

2 years ago

Three of these ratios are equivalent to 8/20. Which one is NOT equivalent?

xz_007 [3.2K]

Where are the ratios?

6 0

3 years ago

What is the volume of the cylinder?

KatRina [158]

Answer:

none of the above

Step-by-step explanation:

the correct answer is 0 cubic meters because there is no cylinder present

8 0

4 years ago

Factor the polynomial completely. Check your answer.<br> 20x^3 - 245xy^2

Alexeev081 [22]

Answer:

$5x(4x^2 - 49y^2)$ or $5x(2x-7y)(2x+7y)$

Step-by-step explanation:

$20x^3 - 245xy^2$

$5x(4x^2 - 49y^2)$

Check your answer:

$5x(4x^2 - 49y^2)$

$5x(4x^2) + 5x(-49y^2)$

$20x^3-245xy^2$

$5x(4x^2 - 49y^2)$ can also be written as:

$5x(4x^2 - 49y^2)$

$5x(2x-7y)(2x+7y)$

$5x(4x^2+14xy-14xy+49y^2)$

$5x(4x^2+49y^2)$

$5x(4x^2) + 5x(-49y^2)$

$20x^3-245xy^2$

Hope this helps!

3 0

3 years ago

Read 2 more answers

a rectangle has length 3 cm greater than it’s width. If it has an area of 28cm 2, find the dimensions of the rectangle

zvonat [6]

The length of the rectangle is 7 centimeter and the width of the rectangle is 4 centimeter

A rectangle has length 3 cm greater than it’s width

Consider the width of the rectangle = x

The length of the the rectangle = x + 3

The area of the rectangle = 28 square centimeter

The area of the rectangle = The length of the the rectangle × The width of the rectangle

Substitute the values in the equation

x(x+3) = 28

Apply the distributive property

$x^2$ + 3x = 28

$x^2$ + 3x -28 = 0

Split the middle term and solve the equation

$x^2$ -4x + 7x -28 = 0

Take common term outside

x(x-4) + 7(x-4) =0

Take common term outside

(x+7) (x-4) = 0

x = -7, 4

The length cannot be negative value

x = 4 centimeter

Then the length of the rectangle = x + 3

= 4 +3

= 7 centimeter

Hence, the length of the rectangle is 7 centimeter and the width of the rectangle is 4 centimeter

Learn more about area here

brainly.com/question/20693059

#SPJ9

8 0

1 year ago