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Luden [163]
3 years ago
9

A rectangle has a length of 11 inches and a width of 7 inches. If the length is increased by xx inches and the width increased b

y three times that amount, express the area of the rectangle as a function of x.
A(x)=??
Mathematics
1 answer:
charle [14.2K]3 years ago
8 0
A(x) = (11+x)(7+3x)
A(x) = 77 + 33x + 7x + 3x^2
A(x) = x^2 + 40x + 77

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22

Step-by-step explanation:

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2 years ago
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What is the median of the followng set of number 1,6,8 and 10
erastova [34]

The answer is 2.5

Step-by-step explanation:

Formula = (N + 1 / 2th) term

So,

Total numbers (N) = 4

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(N + 1 / 2th) term

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= (5 / 2th) term

= (2.5th) term

<em>If</em><em> </em><em>you</em><em> </em><em>like</em><em> </em><em>it</em><em> </em><em>plz</em><em> </em><em>make</em><em> </em><em>me</em><em> </em><em>brainliest</em>

3 0
2 years ago
Find the area a of the triangle whose sides have the given lengths. a = 20, b = 15, c = 25 a =?
PIT_PIT [208]

The area of a triangle with sides a = 20, b = 15, and c = 25 is 150.

The sides of the triangle are given as a = 20, b = 15, and c = 25.

We will use Hero's formula to find the area of this triangle.

<h3>What is Heron's formula?</h3>

It is a three-face polygon that consists of three edges and three vertices.

We use Heron's formula to find the area of a triangle with 3 sides:

Herons formula:

Area of a triangle =  \sqrt{s(s-a)(s-b)(s-c)}\\

Where a, b, and c are sides of a triangle.

And s = semi perimeter of a triangle.

s = \frac{a+b+c}{2}

If the sum of two sides of a triangle is greater than the third side of a triangle then the sides of a triangle are true.

Let the given sides be:

a = 20, b = 15 and c = 25.

(20 + 15) > 25

(20 + 25) > 15

(15 + 25) > 20 so the given sides are true.

Now,

Semi perimeter of the triangle:

s = (a+b+c) / 2

s = (20+15+25) / 2

s = 60 / 2

s = 30

Putting s = 30 in the area of the triangle.

we get,

Area of the triangle = \sqrt{s(s-a)(s-b)(s-c)}\\

Area of the triangle = \sqrt{30(30-20)(30-15)(30-25)}\\\\\sqrt{30\times10\times15\times5}\\\\\sqrt{22500}\\\\150

Thus, the area of a triangle is 150.

Learn more about the Area of triangles here:

brainly.com/question/11952845

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3 0
1 year ago
Pls help , will give brainliest answer
bija089 [108]
I know this answer!!! It’s A and C for the first one!
3 0
2 years ago
Diego says tha the product of 0.51 x 2.427 will have five decimal places. Is Diego correct. Explain
krek1111 [17]
Correct. 0.51 × 2.427 = 51 × 2427 / 10×1000
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