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Ray Of Light [21]
3 years ago
13

ellen had 25 hair clips,7 of them were blue and the rest are purple.what percent of hair clips were purple

Mathematics
2 answers:
strojnjashka [21]3 years ago
6 0
Answer=72%

25-7=18purple clips

  18       x
____=____
  25     100

cross multiply
25x=1800
divide both sides by 25
x=72%
Tcecarenko [31]3 years ago
3 0

Ellen had 25 hair clips. 7 of them were blue and the rest were purple. What percent of hair clips were purple?

To find out how many hair clips are purple, we can subtract 7 from 25 to see how many hair clips are purple. 25 - 7 = 18 so we now know that 18 hair clips are purple.

The fraction \frac{18}{25} represents the number of purple hair clips Ellen has out of all the hair clips together.

To find what percent of the hair clips are purple, we can turn this into a fraction.

18 ÷ 25 = 0.72

0.72 × 100 = 72%

Therefore, 72% of Ellen's hair clips were purple.

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Determine the time necessary for P dollars to double when it is invested at interest rate r compounded annually, monthly, daily,
kipiarov [429]

9514 1404 393

Answer:

  • annually: 9.01 years
  • monthly: 8.69 years
  • daily: 8.67 years
  • continuously: 8.66 years

Step-by-step explanation:

For interest compounded in discrete intervals, the formula is ...

  A = P(1 +r/n)^(nt)

We want to find t for P=1 and A=2, so we have ...

  2 = (1 +r/n)^(nt)

  ln(2) = nt·ln(1+r/n)

  t = ln(2)/(n·ln(1+r/n))

A table of values for r=0.08 is attached.

__

For continuous compounding, the formula is ...

  A = Pe^(rt)

  t = ln(A/P)/r = ln(2)/0.08 ≈ 8.66434 . . . . years

__

  • annually: 9.01 years
  • monthly: 8.69 years
  • daily: 8.67 years
  • continuously: 8.66 years

5 0
2 years ago
13x^-5 y^0/5^-3 z^-10
VMariaS [17]

Answer:

\frac{1625z^{10}}{x^{5}}

Step-by-step explanation:

We want to simplify:

\frac{13x^{-5}y^0}{5^{-3}z^{-10}}

We rewrite as positive index to get:

\frac{13y^05^{3}z^{10}}{x^{5}}

This simplifies to

\frac{13*1*125z^{10}}{x^{5}}

This will finally give us:

\frac{1625z^{10}}{x^{5}}

We cannot simplify further.

Hence the simplest form is \frac{1625z^{10}}{x^{5}}

7 0
2 years ago
Using the formula F=9/5C+32, find C when F= 75.
den301095 [7]

Answer:

DIVIDING 9 AND 5 = 23.8

9/5 FRACTION = 0.04

Step-by-step explanation:

If 9/5 means 9 divided by 5

FLIP THE EQUATION

9/5C + 32 = 75

9/5C + 32 - 32 = 75 -32

9/5C = 43

9/5 = 1.8

1.8C = 43

1.8C/1.8 = 4

If 9/5 means 9/5ths fraction

FLIP THE EQUATION

9/5C + 32 = 75

9/5C + 32 - 32 = 75 -32

9/5C = 43

9/5C / 9/5 = 43 / 9/5

C = 0.04

Hope this helps i thought 9/5 was 9 divide by 5. If it was 9/5 as a fraction i also made that equation too.

7 0
3 years ago
3n-5=-48-40n. Please help . I need the steps to solve and the answer
liraira [26]

3n-5=-48-40n

Move -40n to the other side. Sign changes from -40n to +40n.

3n+40n-5=-48= -48-40n+40n

3n+40n-5=-48

Move -5 to the other side.

3n+40n-5+5=-48+5

3n+40n=-43

43n=-43

Divide by 43 for both sides

43n/43=-43/43

n=-1

Answer: n=-1

5 0
3 years ago
Read 2 more answers
Four friends equally share three candy bars. Which fraction represents how much each friends receives?
elixir [45]
Each friend would receive 3/4
8 0
3 years ago
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