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Tanzania [10]
3 years ago
8

Andy claims that his bird can do single-digit multiplication. He shows the bird 12 cards with simple multiplication problems tha

t are either correct or incorrect. The bird correctly identifies the correctness of the card 9 times out of 12. If the bird were simply guessing, how many would the bird be expected to get correct? (1 point)
3
9
6
12
Mathematics
1 answer:
Snowcat [4.5K]3 years ago
6 0
If the bird were just guessing there would be two options (right or wrong) and we would expect them to be equally likely to occur (50% chance for each). A 50% of correct, out of 12 cards gives us:

12×0.50=6

If the bird was guessing we would expect 6 correct answers. (1/2 of the total correct and 1/2 wrong.)

So the answer would be 6.
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3 0
3 years ago
How do i round 4,398,202 to the nearest 100
Vikentia [17]
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Answer: 4,398,200
8 0
3 years ago
Read 2 more answers
Please help me!
Juliette [100K]
The answer is D. Think of the Pythagorean Theorem which states that a^2 + b^2 = c^2. The Pythagorean Identities used in trigonometry are the angle version which can be used to simplify expressions.
6 0
3 years ago
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Which lines, if any, must be parallel based on the given information? Justify your conclusion.
77julia77 [94]
A must be parallel to b.

Proof:
∠3 = <span>∠13 (given)
</span>∠15 = <span>∠13 (vertically opposite angles are equal)
Since </span>∠13 = ∠3 and ∠13 = ∠15, ∠15 = <span>∠3

Then, a must be parallel to b (transverse line d cuts parallel lines producing converse alternate angles that are equal (ie </span>∠15 = <span>∠3))
</span>
7 0
3 years ago
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Anuta_ua [19.1K]
If h(x) = -2x - 10 you should put the -4, -2. -18, -3 or/and -16 in the place of the x in the formula.
So for example:

h(-4) = -2 * (-4) - 10 = 8 - 10 = -2

Or at least, that's what I think the answer should be.

Good luck!
8 0
3 years ago
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