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kondor19780726 [428]

3 years ago

7

Kaitlin purchased a prepaid phone card for $15. Long distance calls cost 21 cents a minute using this card. Kaitlin used her car

d only once to make a long distance call. If the remaining credit on her card is $5.76, how many minutes did her call last?

1 answer:

Leya [2.2K]3 years ago

7 0

The phone call lasted for 44 minutes. If you leant you set up the equation properly, you will do great :)

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Andre45 [30]

Answer:

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Step-by-step explanation:

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3 years ago

If you earn $1200 per month and you expect your earnings to increase by 10% per year, what monthly salary would you be making in

Sergio [31]

So u turn the percent into a decimal.
0.10
Now multiply 1200 * 0.10
1200*0.10= 120 ( 120 is the amount that is gonna increase)
So if it says 5 years, than your gonna multiply 120 * 5
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So your gonna add 600 to 1200.
So in five years your gonna be making 1,800.
An easier way would be to use prt
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So now you just add 600 to 1200
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3 years ago

If x-y = 40 and x+y = 70, then what is the value of x squared -y squared ?

OlgaM077 [116]

Let's see what to do buddy...

____________________________

Reminder:

$(a + b)(a - b) = {a}^{2} - {b}^{2}$

So we need to just Multiply above equations like this :

$x + y = 70$

$x - y = 40$

$(x + y)(x - y) = 70 \times 40$

${x}^{2} - {y}^{2} = 2800$

____________________________

And we're done.

Thanks for watching buddy good luck.

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3 years ago

According to the fundamental theorem of algebra, how many roots exist for the polynomial function? F(x) =4x^5-3x

tangare [24]

Answer: x(4x

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Step-by-step explanation:

GCF = xx

x(

x

4x

5

+

x

−3x

)

x(4x

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Gemiola [76]

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