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3 years ago

Please help me with this

Mathematics

1 answer:

Ierofanga [76]3 years ago

5 0

Negative 1 times the square root of 61 is -7.81

A. An integer is a whole number without decimals

If this is rounded to the nearest integer, the number is -8

B. Rounded to the nearest tenth is the first decimal place. Therefore the number would be -7.8.

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A radio disc jockey has 7 songs on this up coming hour's playlist: 2 are rock songs, 2 are reggae songs and 3 are country songs.

SVETLANKA909090 [29]

Answer:

Probability that song selected after first selection is rock = 2/7

Probability that song selected from the remaining after second selection is country rock = 1/2

Step-by-step explanation:

Total number of songs = 7

After first selection, probability that the song selected is rock = 2/7

After second selection, probability that the song selected from the remaining is a country song = 3/6 = 1/2

8 0

4 years ago

What would P(A|B) be?

Ipatiy [6.2K]

$P(A \cap B) = P(A) \cdot P(B)$

so

$P(A) = \frac{P(A \cap B)}{P(B)} = \frac{2/3}{3/4} = \frac{8}{9}$

also, if A or B happens but not both, you add the chances and subtract the chance that both are happening.

$P(A|B) = P(A) + P(B) - P(A \cap B) = \frac{8}{9} +\frac{3}{4} - \frac{2}{3} = \frac{35}{36}$

4 0

3 years ago

Find x (x+13)(x-7)=0

alex41 [277]

So for this, we will be applying the zero product property, which is "if a x b = 0, then either a = 0 or b = 0 or both a and b = 0". In this case, a = x + 13 and b = x - 7. Solve them separately:

$x+13=0\\ x=-13\\ \\ x-7=0\\ x=7$

Your answer is x = -13 and 7.

7 0

3 years ago

Find the y-intercept of the parabola whose equation is f(x)=-2x^2-8x+5

tatyana61 [14]

Answer:

i'm pretty sure the y-intercept would be 5

6 0

4 years ago

I need help please help

Bumek [7]

Answer:

:) good day mate

Step-by-step explanation:

:) indeed

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4 years ago