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Paha777 [63]
3 years ago
12

What is the value of x? What is the value of y?

Mathematics
1 answer:
Rainbow [258]3 years ago
7 0

Answer:

The answer to your question is x = 30; y = 14

Step-by-step explanation:

Data

JK = x            PR = 20

JL = 21           PQ = y

LK = 18           QR = 12

Process

1.- Find x

Use proportions to find it

                 JK/PR = LK/QR

Substitution

                 x/20 = 18/12

Solve for x

                  x = 20(18/12)

                  x = 360/12

                 x = 30

2.- Find y

                PQ/JL = PR/JK

Substitution

                y/21 = 20/30

Solve for y

                y = 21(20/30)

                y = 420/30

                y = 14

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If the area of a rectangle is x^2+7x+12, what is the expression for the perimeter?
Cerrena [4.2K]

Length = 13 = (x + 3)

Width = 14 = (x + 4)

x2 + 7x + 12 = area of the rectangle

can be factored into

(x + 3)(x + 4)

Let L = one of the factors (x + 3)

Let W = the other factor (x + 4)

If x = 10 then

(10 + 3) = 13 = L

(10 + 4) = 14 = W

Checking this can be checked a couple of ways

Plug x = 10 into the original equation

x2 + 7x + 12

102 + 7(10) 12 = 100 + 70 + 12 = 182 = Area

Multiplty the factors

L x W = 13 x 14 = 182 = Area

I hope you find this useful if you have any questions please send me a message.

3 0
2 years ago
Need answers ASAP 15 points!
VLD [36.1K]

Answer:

Step-by-step explanation:

Part A: 5/26

Part B: 5/26+ 1/2 which is 18/26 or 9/13

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7 0
3 years ago
How to do proportions?
finlep [7]
Solving proportions is simply a matter of stating the ratios as fractions, setting the two fractions equal to each other, cross-multiplying, and solving the resulting equation. You'll probably start out by just solving proportions, like this: Find the unknown value in the proportion: 2 : x = 3 : 9.
6 0
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Mr Matt spent 1/4 of a day at his office on Monday and 7/10 of a day at the office on Tuesday what fraction of a day did he spen
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Answer:

19/20

Step-by-step explanation:

7/10+1/4

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Answer:

I solved part a

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PART C

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Step-by-step explanation:

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