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2 years ago

In a class, 60% of the students are girls. There are 18 girls in the class.

Mathematics

1 answer:

N76 [4]2 years ago

5 0

Answer:

The answer is 30

Step-by-step explanation:

If you were to do 50% of 30, it would be 15 students that are girls. There's 18 students that are girls though, so the extra 10% would make 18 students in the class girls. The remaining 40% would be 12 boys. So basically you're taking 10% from one side and putting it in the other because 50% of 30 is 15 (well this is at least how I would do it, I don't know how others would do it though)

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How do i factor x^3+3x^2

Mariulka [41]

All you need to do is pull out the common factor of $x^2$ :
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3 years ago

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Morgarella [4.7K]

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Step-by-step explanation:

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3 years ago

Elise and her dad are planning to attend the state fair. An adult ticket is $21.00. The price of an adult ticket is $10.00 more

sashaice [31]

Answer:The equation to determine how much Elise will pay for a student ticket is 2x = 33

Step-by-step explanation:

Let x represent the price of one student ticket.

Elise and her dad are planning to attend the state fair and the price of an adult ticket is $21.00

The price of an adult ticket is $10.00 more than two thirds the price of a student ticket. This means that

21 = 2/3 × x + 10

The equation to determine how much Elise will pay for a student ticket would be

2x/3 + 10 = 21

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5 0

3 years ago

Dustin's family is moving across town. They are busy packing their furniture into a moving van. The storage space in the moving

Ratling [72]

I think that the answer is 28

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3 years ago

(x-2) is a factor of x^2-3x^2+kx+14. The value of k is?

BartSMP [9]

Answer:

k = 5

Step-by-step explanation:

I will assume that your polynomial is

x^2 - 3x^2 + kx + 14

If x - a is a factor of this polynomial, then a is a root.

Use synthetic division to divide (x - 2) into x^2 - 3x^2 + kx + 14:

2 / 1 -3 k 14

2 -2 2k - 4

-------------------------------------

1 -1 (k - 2) 2k - 10

If 2 is a root (if x - 2 is a factor), then the remainder must be zero.

Setting 2k - 10 = to zero, we get k = 5.

The value of k is 5 and the polynomial is x^2 - 3x^2 + 5x + 14

6 0

3 years ago