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2 years ago

Help please A. 12 B. 6 C. 2 D. 15

Mathematics

2 answers:

Gre4nikov [31]2 years ago

8 0

Answer:

The answer to this equation would be B. 6!

Step-by-step explanation:

2x + 3 = 15
Subtract 3 from left and right side. Variable needs to be left alone. 15 will turn into 12.
2x = 12
x= 6 since 2 x 6 = 12 or divide 12 by 2 and get 6

Check Answer:

2(6) + 3 = 15

2x6 =12

12 + 3 =15

Oliga [24]2 years ago

6 0

Answer:

Step-by-step explanation:

2x + 3 = 15

- 3 -3

__________

2x = 12

_______

2 2

That cancels out 2x so x = 6

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Rectangles J and K are similar. If the area of rectangle J is 440, what is the area of rectangle K? I need this today

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Answer:

$Area = 27.5$

Step-by-step explanation:

Given

$J_{Area} = 440$

$J_{Width} = 22$

$K_{Width} = 5.5$

See attachment

Required

Determine the area of K

First, we need to calculate the length of the rectangle J

$J_{Length} * J_{Width} = J_{Area}$

This gives:

$J_{Length} * 22 = 440$

Divide both sides by 22

$\frac{J_{Length} * 22}{22} = \frac{440}{22}$

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So, the length of the rectangle J is 20.

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$J_{Length} : J_{Width} = K_{Length} : `K_{Width}$

Substitute the known values:

$20 : 22 = K_{Length} : `5.5$

Express as fraction:

$\frac{20 }{ 22 }= \frac{K_{Length} }{ `5.5}$

Make Length, the subject of formula

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3 years ago