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4 years ago

13

Which statement is true? A.Two angles can be complementary and equal. B.Two angles cannot be equal if they are complementary. C.

An angle can be complementary only if it is 90°. D. Only three angles can be supplementary.

1 answer:

o-na [289]4 years ago

3 0

A because complementary angles means 2 angles that add together to equal 90 degrees and it's possible for both angles to be 45.

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The ratio of black bags to blue bags is 5 to 3. If there are a total of 10 black bags, then how many blue bags are there?

pychu [463]

Answer:

There should be 6 blue bags.

Step-by-step explanation:

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3 years ago

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A fish tank contains 16 goldfish and 24 guppies. If you randomly select 2 fish, what is the probability that they are both goldf

morpeh [17]

Hello, Shakiya214!

If a fish tank contains 16 goldfish and 24 guppies, then we can deduce that the total number of fish in the tank is: 16 + 24 = 40 fish.
If there are 16 goldfish in the tank, then of the 40 total fish, we have a probability of 16/40.

To illustrate this idea, suppose we had n fish in the tank (a guppies and b goldfish). The probability of selecting any fish is 100% (because there are only fish in the tank). If we had to select the goldfish, we could choose them like this:

p₁, p₂, p₃, p₄ ... pₐ

We could choose any one of these fish twice. This leaves us with: 16/40
Now, if they were NOT replaced, we could simply do it again. Except this time, we can only choose 15 out of the remaining 39 goldfish, leaving us with a probability of: (16/40)(15/39) = 240/1560 = 6/39 = 2/13

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3 years ago

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Can someon help mee!!

zvonat [6]

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3 years ago

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Solve –2.8(z + 1) – (3.5z – 9) = –31.6 for z. A. –1.32 B. 0.94 C. 6 D. –7.72

andreyandreev [35.5K]

Answer:

$z=6$

Step-by-step explanation:

$-2.8\left(z+1\right)-\left(3.5z-9\right)=-31.6$

$-6.3z+6.2=-31.6$

$-6.3z+6.2-6.2=-31.6-6.2$

$-6.3z=-37.8$

$\frac{-6.3z}{-6.3}=\frac{-37.8}{-6.3}$

$z=6$

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4 years ago

Please Answer!!!

gavmur [86]

This is the answer, attached below. :)

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4 years ago