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notsponge [240]
3 years ago
8

There are 238 juniors at a high school. The ratio of girls to boys in the junior class is 3:4. How many juniors are girls? How m

any are boys?
Mathematics
1 answer:
german3 years ago
6 0

Answer:

Total students=238

ratio of boys to girls = 3:4

no of girls= (3/4) x 238=179

no of boys = 238-179=59

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Given f(x) and g(x) are inverse functions. If f(-2)=1 then g(1)=-2<br><br> True<br><br> False
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True.

The y-axis of the f(x) must equal to the x-axis of g(x)

The x-axis of the f(x) must equal to the y-axis of g(x)

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3 years ago
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Can someone answer this question please answer it correctly if it’s corect I will mark you brainliest
marshall27 [118]

Answer:

5) 27/70

6) 90

Step-by-step explanation:

5) The first step in this problem is to figure out the amount of total spins. To do so, add up all of the numbers in the column "Frequency".

18 + 15 + 27 + 10 = 70.

Now, look at the amount of times the spinner landed on green. This is 27 times. So, the ratio of green spins to total spins is 27:70, or 27 out of 70 spins. Converting this to a fraction, we get the final answer, 27/70.

6) To solve this problem, we have to first do the same steps as the previous problem, but with the color red. There are 70 total spins, and 18 red spins. Therefore, the ratio is 18:70. However, this problem wants the total number of spins to be 350. In other words, 70 needs to become 350. To do this, multiply each side of the ratio by 5. The ratio becomes 90:350. Using this ratio, we can determine that a solid prediction is 90 red spins out of 350 total spins.

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3 years ago
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The scores on an achievement test are normaly distributed with mean µ = 100 and standard deviation σ = 100. What should the scor
ser-zykov [4K]

Answer:

the student should score atleast 229 to be among the top 10%.

Step-by-step explanation:

in terms of the normal distribution, and if the table that you're using calculates the area of the normal distribution from the mean to a point x, only then what we are actually finding the value 'x' at which the z-score is at 40% (the rest 50% is already skipped by the table)

P(0.4) = \dfrac{x - \mu}{\sigma}

after finding the the value at this z-score, we can find the value of x at which the score is in the top 10% range.

we can find the z-score either using a normal distribution table or calculator. (but be sure what area is it calculating)

looking at the table the closest value we can find is, 0.4015 at z = 1.29 ((it is above 40% because we want to be in the top 10% range)

P(0.4015) = \dfrac{x - 100}{100}

1.29 = \dfrac{x - 100}{100}

x = 1.29(100) + 100

x = 229

the student should score atleast 229 to be among the top 10%.

7 0
3 years ago
Carol successfully increases her business to 200 customers per day. However, her total cost for doing so is 50% greater than the
kramer

Carol's Steakhouse, the total cost of serving 150 customers per day is $900. Carol is interested in increasing her business, but is concerned about the effect on marginal cost.

Carol successfully increases her business to 200 customers per day. However, her total cost for doing so is 50% greater than the expected $1,600. What percent greater is the actual marginal cost than the expected marginal cost, to the nearest full perc

Answer:

214

Step-by-step explanation:

We have been given

C1 = $900

Q1 = 259

Then c2 = $1600

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1500/50 = 30

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= 214

It is greater by 214 percent

5 0
3 years ago
What is an equation of the line that passes through the point (-6, – 7) and is perpendicular to the line 6x + 5y = 30?
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Answer :6x + 5y = 30

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y = 6 - (6/5) x

So slope = -6/5

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So y = 5/6 x            +   b

Passed through (-6, -7) so           -7  =   -5  + b

Sp b = -2

So y = (5/6)x - 2

Step-by-step explanation:

3 0
3 years ago
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