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alukav5142 [94]
3 years ago
7

I just need to check if the answer I got is right cause I’m not sure. (7th grade)

Mathematics
1 answer:
zubka84 [21]3 years ago
3 0

Answer:

48 ft.

Step-by-step explanation:

Since triangles ABC and DEC are similar (you can prove this quite easily), then we know the ratio of the sides are equal. This is a property of similar triangles. So we take the ratio of the sides CE and DE and the ratios of the sidesBC and AB.

We get:

\frac{x}{40} = \frac{60}{50} \Rightarrow x = \frac{6}{5}\times 40 = 48.

So x is 48 ft.

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If x -9 is a factor of x^2 -5x-36 , what is the other factor ?
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Answer:

(x + 4) (x - 9)

Step-by-step explanation:

Factor the following:

x^2 - 5 x - 36

The factors of -36 that sum to -5 are 4 and -9. So, x^2 - 5 x - 36 = (x + 4) (x - 9):

Answer: (x + 4) (x - 9)

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Step-by-step explanation:

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6 0
3 years ago
: A new bear population that begins with 150 bears in 2000 decreases at a rate of 20% per year.
d1i1m1o1n [39]

Answer:

2 bears in 2020.

Step-by-step explanation:

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a = Initial value,

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x = Time

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To find the population in 2020, we will substitute x=20 in our equation as:

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