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hoa [83]
3 years ago
8

P² 13p=-30 menentukan nilai p

Mathematics
1 answer:
garri49 [273]3 years ago
4 0
I hope this helps you

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Jamie has 100 milliliters of a 50% isopropyl alcohol solution. How many milliliters of a 96% isopropyl alcohol solution does she
serious [3.7K]

Answer:

318.2 ml

Step-by-step explanation:

Jamie has 100 ml of a 50% isopropyl alcohol solution.

She wants to prepare a solution of 85% by adding 96% solution of isopropyl alcohol solution.

Let the amount of 96% solution required = x ml

Final amount of 85% isopropyl alcohol solution = (100 + x) ml

Therefore, equation for this situation will be,

100 × (50%) + (x) × (96%) = (100 + x) × (85%)

100(0.5) + 0.96x = 0.85(100 + x)

50 + 0.96x = 85 + 0.85x

0.96x - 0.85x = 85 - 50

0.11x = 35

x = \frac{35}{0.11}

x = 318.18 ml

  ≈ 318.2 ml

Therefore, she will require 318.2 ml of 96% isopropyl alcohol solution.

4 0
3 years ago
Please let me know ​
bazaltina [42]

21) option C

................

4 0
2 years ago
Brian invests £1800 into his bank account.
SVEN [57.7K]

Step-by-step explanation:

\underline{ \underline{ \text{Given}}} :

  • Principal ( P ) = £ 1800
  • Rate ( R ) = 5%
  • Time ( T ) = 3 years

\underline{ \underline{ \text{To \: find}}} :

  • Total amount

\underline{ \underline{ \text{Solution}}}:

First , finding the amount of interest :

\boxed{ \sf{Interest =  \frac{PTR}{100}}}

⇢ \sf{Interest =  \frac{1800 \times 5 \times 3}{100}}

⇢ \sf{Interest =  \frac{27000}{100}}

⇢ \sf{Interest = £ 270}

Now , Finding the total amount :

\boxed {\sf{Total \: amount = Principal + Interest}}

⇢ \sf{Total \: amount = 1800 + 270}

⇢ \sf{Total \: amount   =  \: £ 2070}

\red{\boxed{ \boxed{ \tt{Our \: final \: answer : brian \: will \: have £ 2070 \: after \: 3 \: year.}}}}

Hope I helped ! ♡

Have a wonderful day / night ! ツ

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6 0
3 years ago
The length of a rectangle is 3 inches greater than the width.
kati45 [8]

Answer:

A - x (x+3) = Area of the rectangle

B- 28 inches squared

Step-by-step explanation:

B- using the formula from A

x = 4

x + 3 = 4 +3 = 7

4 times 7 is 28

4 0
3 years ago
Read 2 more answers
Solve by substitution. 5x + 4y = -14 y = -7x - 15
ki77a [65]

Answer:

(-2,-1)

Step-by-step explanation:

5 0
3 years ago
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