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3 years ago

PLEASE SOLVE THIS!!!

Mathematics

1 answer:

VLD [36.1K]3 years ago

3 0

Answer:

Step-by-step explanation:

radius is 32

hope it helps

p.s I know basically every thing

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The length of a particular rectangle is 2 inches less than twice its width. If the area of the rectangle is 40 square

lianna [129]

ANSWER:

Let width be x, then length be 2x – 2

Now, Area of rectangle = L × B

x(2x – 2) = 40
2x² – 2x – 40 = 0
2(x² – x – 20) = 0
x² – x – 20
x² –5x + 4x – 20 = 0
x(x – 5) + 4(x – 5) = 0
(x + 4)(x – 5) = 0
x = – 4; 5

Hence, width can't be negative.

So width = 5in.

And Length = 2 × 5 – 2

10 – 2 = 8in.

So, Correct choice - [D] Length is 8 in, Width is 5 in.

3 0

3 years ago

8TH GRADE GEOMETRY:100 POINTS+BRAINLIEST: Please answer the question and explain how you did it. Also, please tell me what a "ra

tatyana61 [14]

Answer:

Option B 1 : 3

Step-by-step explanation:

Volume formulas & definitions:

To solve this problem, we must remember the formulas for volume of each shape:

$V_{cylinder}=\pi r^2h\\V_{cone}=\frac{1}{3} \pi r^2 h$ where r represents the radius of the circular part of the shape, and h represents the height of the shape (the plural of height is "heights", and the plural of radius is "radii")

So, when the question states that the shapes "have congruent heights and radii" it means that the height of both objects is the same, and the radius of both objects is the same.

Ratios

To find the ratio of the volume of the cone to the volume of the cylinder, we must setup the ratio. Ratios can be setup as a fraction where the first quantity is the numerator (top of fraction), and the second quantity is the denominator (bottom of the fraction):

$\dfrac{V_{cone}}{V_{cylinder}}=\dfrac{\frac{1}{3} \pi r^2 h} {\pi r^2 h}$

Since the pi, the "r", and the "h" are the same in both the numerator and denominator (and since there is only multiplication & division in the fraction) these common factors can cancel, and reduce the fraction to the following:

$\dfrac{V_{cone}}{V_{cylinder}}=\dfrac{\frac{1}{3}} {1}$

Any number divided by 1 doesn't change, so one-third divided by 1 is still one-third.

$\dfrac{V_{cone}}{V_{cylinder}}=\frac{1}{3}$

Other representations of ratios

Lastly, we must remember that a ratio an also be written with a colon symbol, where the numerator is written first, and the denominator is written second.

So, the ratio of the volume of the cone to the volume of the cylinder is:

1 : 3

7 0

2 years ago

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Abigail's car uses 3 2/3 gallons of gas every hour on a long distance trip. How many gallons does the car use in 8 1/2 hours?

san4es73 [151]

Answer:

31.166 repeating

Step-by-step explanation:

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3 years ago

20 points need help now

-BARSIC- [3]

Answer:

n=5, n^2 = 36 now

Step-by-step explanation:

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4 years ago

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If the average price of four shoes is 50 dollars, and three of thise pairs are priced at 35 40 and 55, what is the price of thr

Vlad1618 [11]

Maybe the price of the fourth pair is like about fifty dollars because the average of the four shoes are fifty dollars. The other shoe pairs that he/she bought is thirty five, forty and fifty dollars.

So, the price is about fifty dollars.

4 0

3 years ago