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3 years ago

15

There are 12 boys and 13 girls in a class. If the teacher randomly chooses a student's name out of a hat, what is the probabilit

y it will be a girl?

2 answers:

Alex787 [66]3 years ago

6 0

50 percent of 25 percent chance

Afina-wow [57]3 years ago

5 0

12:13 is the answer

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Write an equivalent expression using the given property.

gayaneshka [121]

3xy -6x

just multiply 3x by y and 3x by -2

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2 years ago

The ratio of angle measures is 1:2:2. Classify the triangle by its angle measures. a.acute triangle b.right triangle c. obtuse t

HACTEHA [7]

Angles in a triangle must add up to 180°, so you could use this information to find the values of the angles. 1 + 2 + 2 = 5, 180 ÷ 5 = 36. 36 × 2 = 72, so 36 + 72 + 72 = 180. This means that the answer is A. acute, because all of the angles are below 90°. I hope this helps!

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3 years ago

If f(1)=4 and f(n)= -2(n-1) -4 then find the value of f(5)

hoa [83]

Answer: f(5) = 43

Step-by-step explanation:

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2 years ago

The price of a computer component is decreasing at a rate of 15% per year. State whether this decrease is linear or exponential

Margaret [11]

Answer:

Since the price is given by an exponential function, the decline in price is exponential.

The component will cost $36.8475 in three years.

Step-by-step explanation:

The equation for the price of a component has the following format:

$P(t) = P(0)(1-r)^{t}$

In which P(t) is the price after t years, P(0) is the initial price, and r is the rate that the price decreases.

Since the price is given by an exponential function, the decline in price is exponential.

The price of a computer component is decreasing at a rate of 15% per year.

This means that $r = 0.15$

Component costs $60 today

So P(0) = 60. Then

$P(t) = P(0)(1-r)^{t}$

$P(t) = 60(1-0.15)^{t}$

$P(t) = 60(0.85)^{t}$

What will it cost in three years?

This is P(3).

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$P(3) = 60(0.85)^{3} = 36.8475$

The component will cost $36.8475 in three years.

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3 years ago

Please help....There are 42 boys and girls participating in an essay-writing competition. Of the competitors, 21 are in seventh

almond37 [142]

The probability of an 8th grader winning is : 14/42 which reduces to 1/3

the simulation would be : # 3 <====

because u will have 6 equal sections on ur spinner...with each section representing 7 people
one section representing 9th graders...so their is 7 of them
2 sections representing 8th graders....so their is 7 * 2 = 14 of them
and 3 sections representing 7th graders....7 * 3 = 21 of them

7 0

3 years ago

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