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3 years ago

The solution to 5x - 7 = 21?

Mathematics

2 answers:

NeX [460]3 years ago

5 0

Answer:5.6

Step-by-step explanation:5x=21+7

5x=28

x=28/5

x=5.6

lapo4ka [179]3 years ago

4 0

Answer:

x = 5.6

Step-by-step explanation:

5x - 7 = 21

5x = 28

x = 5.6

Can I geet brainliest

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Answer:

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Step-by-step explanation:

The given suares are when joined in the way as shown in picture their sides form a right agnled triangle.

Area of square 1 and perimeter of square 2 will be used to calculate the sides of the triangle.

So,

Area of square 1: 81 square inches

$s^2 = A\\s^2 = 81\\\sqrt{s^2} = \sqrt{81}\\s = 9$

Perimeter of square 2: 48 inches

$4*side = P\\4* side = 48\\side = \frac{48}{4}\\side = 12\ inches$

We can see that a right angled triangle is formed.

Here

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And the side of largest square will be hypotenuse.

Pythagoras theorem can be used to find the length.

$(H)^2 = (P)^2+(B)^2\\H^2 = (9)^2+(12)^2\\H^2 = 81+144\\H^2 = 225\\\sqrt{H^2} = \sqrt{225}\\H = 15$

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The length of side of largest square is 15 inches

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3 years ago

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3 years ago

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Step-by-step explanation:

We just have to add together the length of the three sides to find the perimeter of the triangle.

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Combine like terms.

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3 years ago

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Answer:

Step-by-step explanation:

Given,

Side of square = 3 feet.

To find : Area of square = ?

Formula : -

Area of square = ( side )²

Area of square

= 3²

= 3 x 3

= 9 feet²

Therefore,

The unit of it's area will be 9 feet².

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2 years ago