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3 years ago

8

I don’t get how you get a and b

1 answer:

Alisiya [41]3 years ago

6 0

For this question, you will now need to solve for both a and b, you can break down the expression that they want you to find:

(a^2-b^2)/(a-b)
= (a+b)(a-b)/(a-b) (Difference of squares)
= a+b (The (a-b) is common at the top and bottom so they will cancel

Now a+b =
Therefore the answer is (C)

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34. The amount of money in an account with continuously compounded interest is given by the formula 1

kirill115 [55]

Answer:

Step-by-step explanation:

I have no idea what formula that is you're using but the one I teach in both algebra 2 and in precalculus for continuous compounding is

$A(t)=Pe^{rt}$

where A(t) is the amount after the compounding, P is the initial investment, ee is Euler's number, r is the interest rate in decimal form, and t is the time in years. If our money doubles, we just have to come up with a number which will be P and then double it to get A(t). It doesn't matter what number we pick to double, the answer will come out the same regardless. I started with 2 and then doubled it to 4 and filled in the rest of the info given with time as my unknown:

$4=2e^{(.062)(t)}$

Begin by dividing both sides by 2 to get

$2=e^{.062t}$

The only way we can get that t out of its current position is to take the natural log of both sides. Natural logs have a base of e, so

$ln_e(e)=1$ This is because they are inverses of one another. Taking the natural log of both sides:

$ln2=.062t$ Now divide by .062 to get

t = 11.2 years

4 0

2 years ago

Which pair represents equivalent ratios? A Begin fraction . . . 2 over 3 . . . end fraction . . . and . . . begin fraction . . .

Blizzard [7]

Equivalent ratios are those ratios which are same that is on simplifying each of them, we will get the same answer.

A. $\frac{2}{3} and \frac{9}{15} = \frac{3}{5}$

So they are not equivalent

B. $\frac{5}{8} and \frac{15}{21} = \frac{5}{7}$

So they are not equivalent

C. $\frac{3}{12} and \frac{6}{18} = \frac{1}{4} and \frac{1}{3}$

They are not equivalent too.

D. $\frac{4}{10} and \frac{12}{30} = \frac{2}{5} and \frac{2}{5}$

And they are equivalent. SO the correct option is D .

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3 years ago

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Claire can run 400 meters in 45 seconds. What is her rate in meters per<br> second?

horsena [70]

Answer:

8.9 meters per second I think.

Step-by-step explanation:

400 divided by 45

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3 years ago

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Find the values of angles x, y, z.

My name is Ann [436]

X=80, y=140,z=20
I hope it helps

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3 years ago

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El que me lo responda bien le doy 20 puntos mas :v

m_a_m_a [10]

Answer: hehe, I don’t understand spAnIsh

Step-by-step explanation:

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3 years ago