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Gnom [1K]
3 years ago
7

WILL GIVE BRAINLIEST!!!! Write the following as an EXPRESSION: How much water do I need to add to l liters of pure alcohol to ob

tain a solution of 45% alcohol?
Mathematics
1 answer:
nydimaria [60]3 years ago
5 0

Answer:

If you add 690 ml of water you will obtain 1.690 liter of 70% alcohol. Of course if you halve the amounts, e.g. 0.5 liter 75% alcohol and 345 ml of water, you will also obtain 45% alcohol solution.

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A circle with a radius of 3cm sits inside a circle with a radius of 11cm.
lozanna [386]

Answer:

Area of shaded region = 351.68 cm²

Step-by-step explanation:

Area of a circle = πr²

where r = radius = 3.14

Area of bigger circle = 3.14 × 11²

= 3.14 × 11 × 11

= 379.94cm²

Area of smaller circle = 3.14 * 3²

= 3.14 × 3 × 3

= 28.26cm²

Area of shaded region = Area of bigger circle - Area of smaller circle

= (379.94 - 28.26) cm²

= 351.68 cm²

8 0
3 years ago
Write 7x10^-8 in standard form
attashe74 [19]

Answer:

The answer would be 0.00000007

6 0
2 years ago
Read 2 more answers
-3x - 6+ (-1)<br> help!!!!
guapka [62]

Answer:

-3x = 7 .  

Step-by-step explanation:

-3x - 6 - 1 =

-3x - 7

Hope that helps!

5 0
3 years ago
Read 2 more answers
**WILL GIVE THE BRAINLIEST! &amp; LIKE**
Tamiku [17]
1) combine like terms (k)
0 = 7k
k = 0/7 = 0
zero divided by any numbers will be zero

2) combine the like terms (the constant of -4 + 1)
9 = 6x - 3
add 3 to both sides
12 = 6x
x=2

3) -3+3=0
-4=v

4) 4+3=7
8=k+7
k=1

5)x-5x = -4x
16= -4x
x = -4
8 0
3 years ago
Four bags of rice and two bags of corn weigh 52 lbs. Three of the bags of rice weigh 24 lbs. What is the ratio of weight of the
Paraphin [41]

Answer:

2.1666666

Step-by-step explanation:

52÷24=2.1666666

4 0
2 years ago
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