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2 years ago

5

The geometic mean of 4 and 21

1 answer:

-Dominant- [34]2 years ago

4 0

Answer:

12.5

Step-by-step explanation:

4+21=25

25/2=12.5

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Solve the simultaneous equations

NeTakaya

Answer:

y = 2, x = -1

Step-by-step explanation:

2y - 5x = 9

2y = 9+5x

y = (9+5x) /2

4y + 3x = 5

4((9+5x) /2) + 3x = 5

13x + 18 = 5

13x = -13

x = -1

y = (9+5x) /2

y = (9+5(-1)) /2

y = 2

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2 years ago

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A cyclist rides her bike at a rate of 12 kilometers per hour. What is this rate in kilometers per minute? How many kilometers wi

natulia [17]

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2 years ago

What number is 80% of 660?

ddd [48]

Answer:

528

Step-by-step explanation:

(80:100)*660 =

(80*660):100 =

52800:100 = 528

Now we have: 80 percent of 660 = 528

7 0

2 years ago

2m= cm <br><br><br> Pls help me!!!

Andrej [43]

Answer:

200cm

Step-by-step explanation:

6 0

2 years ago

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how much must you deposit in an account that pays 8% annual interest compounded monthly to have a balance of $1,000 after one ye

strojnjashka [21]

Answer:

$\$923.36$

Step-by-step explanation:

we know that

The compound interest formula is equal to

$A=P(1+\frac{r}{n})^{nt}$

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest in decimal

t is Number of Time Periods

n is the number of times interest is compounded per year

in this problem we have

$t=1\ year\\ A=\$1,000\\ r=0.08\\n=12$

substitute in the formula above and solve for P

$\$1,000=P(1+\frac{0.08}{12})^{12*1}$

$P=\$1,000/(1+\frac{0.08}{12})^{12*1}=\$923.36$

5 0

3 years ago