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2 years ago

The quotient of a number X and 2 is 20

Mathematics

1 answer:

Maurinko [17]2 years ago

6 0

X÷2=20. Want an explanation?

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What is f(r) = 60 - 2/3 r when r =12?

7nadin3 [17]

F(r) = 60 - 2/3r r = 12
Substitute r for 12

f(12) = 60 - 2/3(12) 12 * 2/3 = 8

f(12) = 60 - 8

f(12) = 52

52 is your answer

5 0

3 years ago

4400 dollars is placed in an account with an annual interest rate of 7.5%. To the nearest tenth of a year, how long will it take

Katarina [22]

Answer:

Step-by-step explanation:

The equation for the amount of money in an account after a certain amount is deposited and compounded after t years once per year is

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

Our A(t) = 33800, P = 4400, r = .075 and we are looking for t. Filling in:

$33800=4400(1+.075)^t$ and

$33800=4400(1.075)^t$

Begin by dividing both sides by 4400 to get

$7.681818182=1.075^t$

The only way to move that t our from its current position as an exponent is to take the natural log of both sides and follow the rules for natural logs:

$ln(7.6181818182=ln(1.075)^t$

The power rule of natural logs says we can move that exponent down in front, giving us:

$ln(7.681818182)=t*ln(1.075)$

Divide both sides by ln(1.075) to get

$\frac{ln(7.61818182)}{ln(1.075)} =t$

Do this division on your calculator to get

t = 28.2 years

6 0

3 years ago

Read 2 more answers

Find the distance between the points (3, 7) and (2, 6)

solong [7]

Answer:

1.414214

Step-by-step explanation:

I think this is right lol.

6 0

2 years ago

The sum of two numbers is 196. One number is 64 more than the other. Find the numbers.

ValentinkaMS [17]

Answer:

I just guessed random numbers until I got 66 and 130.

4 0

2 years ago

Read 2 more answers

Find two numbers whose sum is 44 and whose difference is 6. smaller number larger number

Anna [14]

X+ y = 44
x - y = 6
—————
2x = 50

x = 25
y = 44-x = 19

3 0

3 years ago