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3 years ago

Daniel's father worries that his son is not a motivated student, especially after observing his study habits for a week.

Mathematics

1 answer:

lesya [120]3 years ago

4 0

The answer would be C because he did not correct his mistakes that he had made

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If she completely guesses on all of the questions, what is the probability that she gets two of the four questions correct?

masha68 [24]

Answer:

D) 0.211

Step-by-step explanation:

The probability of getting a correct answer is 1/4, so the probability of an incorrect answer is 3/4.

The probability of 2 correct and 2 incorrect is (1/4)(1/4)(3/4)(3/4) = 9/256.

There are C(4,2) = 4·3/(2·1) = 6 ways to have some combination of 2 correct and 2 incorrect out of 4 questions. So, the probability of that result is ...

... 6 · 9/256 = 27/128 =0.2109375 ≈ 0.211

6 0

4 years ago

Mischa wrote the quadratic equation 0=-x^2+4x-7 in standard form. If a = -1, what is the value of c in her equation?

gayaneshka [121]

The correct answer
C= -7

8 0

3 years ago

Q5 Q31.) Use the Pythagorean Theorem to find the length of the missing side of the right triangle. Then find the value of each o

Neporo4naja [7]

a^2 + b^2 = c^2

a = sqrt(c^2 - b^2) = sqrt (20^2 - 16^2)

= 12

sin $\theta$ = a/c = 12/20

= 3/5

cos $\theta$ = b/c = 16/20

= 4/5

tan $\theta$ = a/b = 12/16

= 3/4

csc $\pi$ = c/a = 20/12

= 5/3

= 1 2/3

sec $\pi$ = c/b = 20/16

= 5/4

= 1 1/4

4 0

3 years ago

Read 2 more answers

in the movie drawer there are seven action movies,five comedies,and three dramas. what is the probability of choosing an action

jasenka [17]

Answer:

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ddddddddddddddddddddddddddStep-by-step explanation:

4 0

3 years ago

if 3/5 of a number exceeds it's 2/7 by 44. find the number. the correct and fastest answer will get brainliest

olya-2409 [2.1K]

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A number :

$x$

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3/5 of it :

$\frac{3}{5} x \\$

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2/7 of it :

$\frac{2}{7} x \\$

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3/5 of a number exceeds its 2/7 by 44 thus :

$\frac{3}{5} x - \frac{2}{7} x = 44 \\$

(( Find the number )) ---¢ x asked

So we need to solve the above equation for x.

$\frac{3}{5} x - \frac{2}{7} x = 44 \\$

Multiply sides by 35

$(35) \times ( \frac{3}{5} x) - (35) \times ( \frac{2}{7} x) = 35 \times 44 \\$

$(7 \times 3x) - (5 \times 2x) = 4 \times 35 \times 11 \\$

$21x - 10x = 140 \times 11$

$11x = 11 \times 140$

Divide sides by 11

$\frac{11}{11} x = \frac{11 \times 140}{11} \\$

$x = 140$

Done...

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7 0

3 years ago