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sdas [7]
3 years ago
9

What is the efficiency of a machine that produces 4500 joules of output work for every 4250 joules of input work? (remember to p

ut it in correct units and round to the hundredths place)
Mathematics
1 answer:
rewona [7]3 years ago
4 0

Answer:

105.88%

Step-by-step explanation:

Efficiency:

Output/input × 100

4500/4250 × 100

105.8823529%

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What two numbers multipled get -48 and when added get 8?
Katarina [22]
X * y = -48
x + y = 8

y = -48/x

x -48/x = 8
x^2 - 48 = 8x
x^2 - 8x -48 = 0
x = 12
y = -4

5 0
3 years ago
Rob invests $3,715 in a retirement account
lions [1.4K]

Answer:

$14,048.62

Step-by-step explanation:

The interest is 9% per year and compounded 3 times a year, so each compound will be 9%/3 = 3%

The time elapsed will be 15 years and the interest compounded 3 times a year, so the number of compounds happens will be = 15 years* 3 compounds/year= 45x compound.

So basically the money will get 3% interest 45 times. To put into the compounding interest formula, the final account balance will be:

A = P (1 + [ r / n ]) ^ nt

A= amount of the balance after a period of t

P= principal, the initial money deposit( $3,715)

r= rate(9%)

n= number of compound per unit of time(3 times per year)

t= time(15 years)

The calculation will be:

A = P (1 + [ r / n ]) ^ nt

A = $3,715(\frac{1+0.09}{3} )^{3*15}

A = $14,048.62

4 0
3 years ago
How do you calculate problems like: 1 million is 70% of what number?
trasher [3.6K]

Answer:

Hope it helps

Have a good day Ahead

3 0
3 years ago
What fraction is equivalent to negative 3 over 2​
Llana [10]

Answer:

-6/4

Step-by-step explanation:

5 0
3 years ago
I need help please help trying to pass this class
rjkz [21]
The right answer is y=5x+-5 becuase slope intercept form is coming in handy for this question. hope this helps.
 
5 0
3 years ago
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