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3 years ago

hat is the difference between the areas of a circular table with diameter 6 ft and a circular table with diameter 8 ft?

Mathematics

1 answer:

prohojiy [21]3 years ago

7 0

I believe it’s pie times radius squared so 6ft = 3.14•3 squares and 8ft = 3.14•4 squares and then subtract

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A rectangle has a length of 12 yards less than 3 times its width. If the area of the rectangle is 135 square yards, find the len

Aleonysh [2.5K]

Answer:

The length is 15 yards

Step-by-step explanation:

Given

Represent the width with W and length with L: So

$Area = 135yd^2$

$L=3W - 12$

Required

Determine the length of the rectangle:

Area is calculated as thus:

$Area = L * W$

Substitute 3W - 12 for L and 135 for Area

$135= (3W - 12) * W$

$135= 3W^2 - 12W$

Reorder:

$3W^2 - 12W - 135= 0$

Divide through by 3

$W^2 - 4W - 45 = 0$

Expand:

$W^2 - 9W + 5W - 45 = 0$

$W(W - 9) + 5(W - 9) = 0$

$(W + 5)(W-9) = 0$

$W + 5 = 0$ or $W - 9 = 0$

$W = -5$ or $W = 9$

But width can't be negative

So:

$W = 9$

Recall that: $L=3W - 12$

$L = 3 * 9 - 12$

$L = 15$

<em>Hence, the length 15 yards</em>

4 0

3 years ago

A laundromat charges $10.80 to clean 18 pounds of laundry. At the same rate, how much will the laundromat charge for 28 pounds o

Drupady [299]

Answer: 16.80 for 28 pounds of laundry

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3 years ago

A farmer has a circular shaped field. Fertilizer

Aleonysh [2.5K]

Answer:

It will be $5 per square yard

Step-by-step explanation:

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2 years ago

2x – 5 > 3 and -4x + 7 < -25

KATRIN_1 [288]

Answer:

Step-by-step explanation:

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2 years ago

Factor the common factor out of the expression 8+20a+18a^2

ruslelena [56]

First let's rewrite it...

18a^2 + 20a + 8

Factor out a 2

2 (9a^2 + 10a + 4)

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3 years ago