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tester [92]
3 years ago
7

I NEED HELP ASAP!!!!

Mathematics
1 answer:
abruzzese [7]3 years ago
8 0
Answer is 4/7

You divide the length of C'D' over the length of CD
C'D'/CD = 8/14 = 4/7

The scale factor is smaller than 1, so C'D' is shorter than CD
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Plz help fifty points
likoan [24]

Answer:

for question 13

  1. 130
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  3. 50
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  7. 50
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Step-by-step explanation:

for 14

    x. 150

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7 0
2 years ago
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emmainna [20.7K]

Answer:

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Step-by-step explanation:

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3 years ago
Six identical squares are cut from the corners and edges of an 80 cm by 50 cm cardboard rectangle. the remaining piece is folded
Anna11 [10]
Check the picture.

let the length of a side of each of the squares removed be x.

The box formed will have dimensions: 80-2x, 50-2x, x(the height)

So the volume can be expressed as a function of x as follows:

f(x)=(80-2x)(50-2x)x=[4000-160x-100x+4 x^{2} ]x=(4 x^{2}-260x+4000)x

so f(x)=4 x^{3}-260x^{2}+4000x

the solutions of f'(x)=0 gives the inflection points, so the candidates for maxima points,

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solving the quadratic equation, either by a calculator, graphing software, or by other algebraic methods as the discriminant formula, we find the solutions

x=10 and x=33.333

plug in f(x) these values to see which greater:

f(10)=(80-20)(50-20)10=60*30*10=18000 cm cubed

f(33.333)=(80-66.666)(50-66.666)33.333= which is negative because (50-66.666)<0



Answer: 18000 cm cubed

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IgorLugansk [536]
F(3)=2*3-8=-2. 
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Two years of local Internet service cost $685, including the installation fee of $85. What is the monthly fee?
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685-85=600
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8 0
3 years ago
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