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Brut [27]
3 years ago
7

Answer this for me plz.?

Mathematics
1 answer:
Elis [28]3 years ago
7 0

Step-by-step explanation:

Length = x-3

width = x+8

Area of the rectangle = 60 inch²

(x-3)(x+8)=60

x²+8x-3x-24=60

x²+5x-24=60

x²+5x-84=0

x²+12x-7x-84=0

x(x+12) - 7(x+ 12) =0

(x+12)(x-7)= 0

x= -12 or, x= 7

Measure of sides of rectangle can never be negative.

Answers:

Therefore,

x=7

Dimensions

length =7-3

=4 inches

width = 7+8

=15 inches

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13% of 400 is what number​
Alchen [17]

Answer:

52 = W

Step-by-step explanation:

Is means equals and of means multiply

13% * 400 = W

Change to decimal form

.13 *400 = W

52 = W

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4 years ago
A clothing store is raising the price of all its sweaters by $3.00. Write a expression that could be used to find the new prices
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GREYUIT [131]

The result of multiplying the polynomials is (2x + 3) (-x + 2y - 4) = -2x² + 4xy - 11x + 6y - 12

<h3>How to multiply the polynomials?</h3>

The polynomial expression is given as

(2x + 3) (-x + 2y - 4)

Expand the brackets in the above polynomial expression

So, we have

(2x + 3) (-x + 2y - 4) = 2x * (-x + 2y - 4) + 3 * (-x + 2y - 4)

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So, we have

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Hence, the solution is -2x² + 4xy - 11x + 6y - 12

Read more about polynomials at

brainly.com/question/17517586

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3 0
2 years ago
Arlene makes a necklace using 14 purple beads for every 6 silver beads. The necklace contains 18 beads. How many of each color b
Margaret [11]

Answer:

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Step-by-step explanation:

Arlene makes a necklace using 14 purple beads for every 6 silver beads. So, she uses purple and silver beads in the ratio 14 : 6 = 7 : 3.

Now, the necklace contains 18 beads, then in the ratio 7 : 3, there will be (18 \times \frac{3}{3 + 7}) = 5.4 numbers of purple beads and (18 - 5.4) = 12.6 numbers of silver beads. (Answer)

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3 years ago
The surface of a pond is being covered by oil leaking from a pipeline. The amount of surface area covered by the oil is doubling
fomenos

Answer:

Count

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Suppose that each day double 2, second day , will double 4, and for third day it's 16, etc.

For like those questions, just count.

Those questions are very simple, but other questions not like those, is not too simple.

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