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3 years ago

A babysitter made $20 for 4 hours one week, $36 in 6 hours the following week. Are the earnings equivalent?

Mathematics

1 answer:

Zinaida [17]3 years ago

6 0

Answer:

No.

First week she made $5 an hour.

Following week she made $6 an hour.

Step-by-step explanation:

All we need to do is figure out how many dollars per hour she made. To do this we divide the amount she made, by the amount of hours she worked.

So:

20 ÷ 4 = 5

36 ÷ 6 = 6.

So no, she earned $1 more the following/2nd week.

<u>Hope this helps and have a nice day!</u>

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Whats 0 divide 0 i really want to know

Gelneren [198K]

Answer

N/A

Step-by-step explanation:

lets take a step into our imaginations, ok?

So when you divide, you're basically splitting the numerator into as many parts as the denominator.

imagine you have a chocolate bar, and it has 6 pieces and you want to split it evenly between your 3 friends.

you split it into three equal parts to get 2 pieces per person.

When you divide 0 by 0, your splitting 0 chocolate bars into 0 equal portions, which is why this problem isn't solvable.

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4 years ago

Determine the type and number of solutions of −4x2 − 3x + 7 = 0.

Kaylis [27]

Answer:

Step-by-step explanation:

You have to use the discriminant for this. If the quadratic is $-4x^2-3x+7$ , then

a = -4, b = -3, and c = 7. The formula for finding the discriminant is

$D=b^2-4ac$ which comes from the quadratic formula, but without the square root sign. Filling in:

$D=(-3)^2-4(-4)(7)$ which simplifies down to

D = 9 + 112 so

D = 121. This is a perfect square, so the solutions will be 2 real. Just so you know, you will NEVER have a solution like the one offered in the third choice down. If you have one imaginary root, you will ALWAYS have a second by the conjugate rule.

7 0

3 years ago

What is a rational number? Plzzz help

ddd [48]

Answer:

A number that can be written as a fraction.

Example: -3/7

4 0

3 years ago

3 in.

gtnhenbr [62]

I would help but i don’t see a figure

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3 years ago

ariane borrows $400 on a 4-year loan. she is charged 5% simple interest per year . How much interest is she charged for 4 years?

vodomira [7]

Answer:

Interests charged for 4 years: $80
Total amount to pay back:$480

Step-by-step explanation:

To know the future value of an specific amount that is borrowed from a bank we use the following equation: $FV= PV\imes{(1+n\times{i})}$ , where FV is future value, PV present value, n the amount of periods and i the interest rate.
In this particular case, the present value of the loan is $400, n=4 (4 years), i=5%. Then the future value equals: $FV= 400\times(1+4\times0.05)$ . Then FV= $480, which is the total amount of money she would have to return in 4 years.
The interest paid can be calculated as the total amount paid ($480) minus the inicial loan ($400), which means that total interests paid= FV- PV= $80.

8 0

3 years ago