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2 years ago

What are the lengths of DE and EF. Answer with supporting work:

Mathematics

1 answer:

nataly862011 [7]2 years ago

5 0

The length of DE is 39 and the length of EF is 36 because we can see from side AC and DF that triangle DEF is just triangle ABC dilated by 3.

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Some one help worth 10 points

egoroff_w [7]

Answer:

3543.72

Step-by-step explanation:

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2 years ago

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Ronch [10]

I think the 4th one but Im not too sure please forgive me if I'm wrong.

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2 years ago

If someone can please help me with this question I’m stuck

Digiron [165]

Answer:

B 65 sq. units

Step-by-step explanation:

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2 years ago

Read 2 more answers

Elimination_4x_2y=14 _10x+7y=_24

Gnesinka [82]

Answer:

The answer is $x=-\frac{50}{8}$ and $y=\frac{11}{2}.$

Step-by-step explanation:

Given:

-4x-2y=14

-10x+7y=-24

Now, to solve it by elimination:

$-4x-2y=14$ ......(1)

$-10x+7y=-24$ ......(2)

So, we multiply the equation (1) by 7 we get:

$-28x-14y=98$

And, we multiply the equation (2) by 2 we get:

$-20x+14y=-48$

Now, adding both the new equations:

$-28x-14y+(-20x+14y)=98+(-48)$

$-28x-14y-20x+14y=98-48$

$-28x-20x-14y+14y=50$

$-8x=50$

Dividing both the sides by -8 we get:

$x=-\frac{50}{8}$

Now, putting the value of $x$ in equation (1):

$-4x-2y=14$

$-4(-\frac{50}{8})-2y=14$

$\frac{200}{8} -2y=14$

$25-2y=14$

Subtracting both sides by 25 we get:

$-2y=-11$

Dividing both sides by -2 we get:

$y=\frac{11}{2}$

Therefore, the answer is $x=-\frac{50}{8}$ and $y=\frac{11}{2}.$

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2 years ago

A car is bought at the price of $45,000. The price decreases at the rate of .25 every year (t). Which equation matches this expo

Solnce55 [7]

B. f(t) = 45,000(.75)t

7 0

2 years ago