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Debora [2.8K]
4 years ago
10

The length of a rectangle is 5 inches more than its width, x. The area of a rectangle can be represented by the equation x 2 + 5

x = 300. What are the measures of the width and the length?
Mathematics
1 answer:
pochemuha4 years ago
4 0
This is a system of equations. We know that if L is length, L=x+5, and area=L*w, where w=x. So, 2+5x=(x+5)x therefore 2+5x=x^2+5x. Subtracting 5x from both sides, x^2=2, therefore x=sqrt(2). So, the width is sqrt(2) and length=sqrt(2)+5
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Answer:

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Step-by-step explanation:

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3 years ago
Ratio of two complementary angles is 3:7. What's the measures of both angles
Advocard [28]
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3 years ago
Prove that the triangle EDF is isosceles. Give reasons for your answer.
Gekata [30.6K]

Answer:

\triangle EDF is isosceles.

Step-by-step explanation:

Please have a look at the attached figure.

We are <u>given</u> the following things:

\angle EDF = y

\text{External }\angle DFG = 90 +\dfrac{y}{2}

Let us try to find out \angle E and \angle DFE. After that we will compare them.

<u>Finding </u>\angle DFE<u>:</u>

Side EG is a straight line so \angle GFE = 180

\angle GFE is sum of internal \angle DFE and external \angle DFG

\angle GFE = 180 = \angle DFE  + \angle DFG\\\Rightarrow 180 = \angle DFE + (90+\dfrac{y}{2})\\\Rightarrow \angle DFE = 180 - 90 - \dfrac{y}{2}\\\Rightarrow \angle DFE = 90 - \dfrac{y}{2} ....... (1)

<u>Finding </u>\angle E<u>:</u>

<u>Property of external angle:</u> External angle in a triangle is equal to the sum of two opposite internal angles of a triangle.

i.e. external \angle DFG = \angle E + \angle EDF

\Rightarrow 90+\dfrac{y}{2} = \angle E + y\\\Rightarrow \angle E = 90+\dfrac{y}{2}  -y\\\Rightarrow \angle E = 90-\dfrac{y}{2} ....... (2)

Comparing equations (1) and (2):

It can be clearly seen that:

\angle DFE = \angle E =90-\dfrac{y}{2}

The two angles of \triangle EDF are equal hence \triangle EDF is isosceles.

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3 years ago
I will give brainleist again if you help me on this question and thanks for helping
algol [13]

Answer:

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Step-by-step explanation:

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Hope this is what it was asking!

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3 years ago
Read 2 more answers
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