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3 years ago

7

Rita is thinking of two numbers. Adding 4 times the first number and 9 times the second number gives a total of 1. Also, adding

4 times the first number and 6 times the second number gives -2. What are the two numbers?

1 answer:

charle [14.2K]3 years ago

6 0

Answer:

first number is negative 2, second is 1

Step-by-step explanation:

-2×4= -8 1×9=9

-8+9=1

-2×4= -8 1×6=6

-8+6= -2

hope this helped

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Read 2 more answers

Alma invests $300 in an account that compounds interest annually. After 2 years, the balance of the account is $329.49. To the n

-Dominant- [34]

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Let us assume rate of interest = r % compounds annually.

We know, formula for compound interest

$A=P(1+r)^t$

Plugging values in formula, we get

$329.49=300(1+r)^2$

$\mathrm{Divide\:both\:sides\:by\:}300$

$\frac{300\left(1+r\right)^2}{300}=\frac{329.49}{300}$

$\left(1+r\right)^2=1.0983$

Taking square root on both sides, we get

$1+r=\sqrt{1.0983}$

$\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}$

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$r=\sqrt{1.0983}-1$

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r=0.048 × 100

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3 years ago