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4 years ago

15 pts + brainliest to right/best answer

Mathematics

2 answers:

svetlana [45]4 years ago

8 0

Answer:

(2x-5) (2x+5)

Step-by-step explanation:

4x^2 -25

This is the difference of squares

a^2 - b^2 = (a-b) (a+b)

(2x)^2 - 5^2

(2x-5) (2x+5)

ZanzabumX [31]4 years ago

6 0

Rewrite it in the form a^2 - b^2, where a = 2x and b = 5

(2x)^2 - 5^2

Use the Difference o Squares: a^2 - b^2 = (a + b)(a - b)

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

The support of a wood table are in the shape of a right triangle. Find the third angle of the triangle of the measure of one of

Semenov [28]

<h3>The measure of third angle of triangle is 67 degrees</h3>

<em><u>Solution:</u></em>

Given that,

The support of a wood table are in the shape of a right triangle

Since it is a right angle, one of the angle must be $90^{\circ}$

The measure of one of the angles is 23 degrees

To find: third angle angle

We know that,

Sum of all angles in triangle equals 180 degrees

Therefore,

$90^{\circ} + 23^{\circ} + \text{ third angle } = 180^{\circ}\\\\ \text{ third angle } + 113 = 180\\\\ \text{ third angle } = 180 - 113\\\\ \text{ third angle } = 67^{\circ}$

Thus measure of third angle of triangle is 67 degrees

5 0

3 years ago

the length of a rectangle is three times it’s width. if the area of the rectangle is 300 yd^2, find its perimeter.

Mashutka [201]

Answer:

80 yards

Step-by-step explanation:

Using the area formula, A = lw, set up an equation where w represents the width.

The length can be represented by 3w because it is 3 times the width:

A = lw

300 = (3w)(w)

300 = 3w²

Solve for w:

300 = 3w²

100 = w²

10 = w

So, the width is 10 yards.

The length will be 30 yards since the length is 3 times the width.

Then, add the lengths and widths together to find the perimeter:

10 + 10 + 30 + 30

= 80

So, the perimeter is 80 yards

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago