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TiliK225 [7]
3 years ago
12

(60 points to best answer) (asap please and thank you)

Mathematics
1 answer:
inna [77]3 years ago
3 0

Answer: 83.\overline{3}\text{ feet}

Step-by-step explanation:

Since, In the given diagram,

The sides of the triangles ABC and EDC are,

BC = 62 feet, DC = 93 feet and DE = 125 feet(given)

And, angles B and D are right angles,

⇒ \angle ABC\cong \angle EDC

\text{Also, } \angle ACB\cong \angle ECD    ( Vertically opposite angles )

By AA similarity postulate,

\triangle ABC\sim \triangle EDC

The sides of similar triangles are in same proportion ,

⇒  \frac{AB}{ED}=\frac{BC}{DC}

⇒  AB \times DC = BC \times ED

⇒  AB = \frac{BC.ED}{DC}

By substituting the values,

We get,

⇒  AB = \frac{62\times 125}{93}

⇒  AB = \frac{7750}{93}=83.\overline{3}\text{ feet}

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Consider the function represented by 9x+3y= 12 with x as the independent variable. How can this function be written using
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Step-by-step explanation:

We want x to be independent means we want to write it so when we plug in numbers we can just choose what we want to plug in for x but y's value will depend on our choosing of x.

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What is the result of a dilation of scale factor 3 centered at the origin of the line 2y + 3x=10?? PLEASE HELP PLEASEEEEEEEEE
maks197457 [2]

Given:

The equation of a line is:

2y+3x=10

The line is dilated by factor 3.

To find:

The result of dilation.

Solution:

The equation of a line is:

2y+3x=10

For x=0,

2y+3(0)=10

2y+0=10

y=\dfrac{10}{2}

y=5

For x=2,

2y+3(2)=10

2y+6=10

2y=10-6

2y=4

Divide both sides by 2.

y=\dfrac{4}{2}

y=2

The given line passes through the two points A(0,5) and B(2,2).

If the line dilated by factor 3 with origin as center of dilation, then

(x,y)\to (3x,3y)

Using this rule, we get

A(0,5)\to A'(3(0),3(5))

A(0,5)\to A'(0,15)

Similarly,

B(2,2)\to B'(3(2),3(2))

B(2,2)\to B'(6,6)

The dilated line passes through the points A'(0,15) and B'(6,6). So, the equation of dilated line is:

y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)

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y-15=\dfrac{-9}{6}(x)

y-15=\dfrac{-3}{2}x

Multiply both sides by 2.

2(y-15)=-3x

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2y+3x=30

Therefore, the equation of the line after the dilation is 2y+3x=30.

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