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insens350 [35]
3 years ago
15

Which one was it? I’ve been trying for a while

Mathematics
2 answers:
Reika [66]3 years ago
6 0
The answer is b (I think not really sure)
Westkost [7]3 years ago
6 0

The answer to the question is A

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You need to strengthen a 19% alcohol solution with pure alcohol solution to obtain 40% solution. How much pure alcohol should yo
Alex73 [517]
Let x be the number of mm of pure alcohol to be added:

I will add the mm to express the volume in mm
100mm.(19%) + (100%).x mL = (100 mL+x mL).(40%).
Now right again without the %
100.(0.19) + x.(1) = (100+x).(0.4)

19 + x = = 40 + 04x
x - 0.4x = 40 - 19
0.6 x = 21
x = 21/0.6  and x = 35 mL. This te quantity of pure alcohol should to be added to get a solution at 40%.



8 0
3 years ago
1. Mary is making a necklace by alternating red, yellow, and green beads. In
Feliz [49]

Answer:    20/ 60 = 1/3

Step-by-step explanation:

60 beads in total which makes that the denominator and how many red beads in the numerator (20) then just reduce the fraction

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3 years ago
Given the perimeter of a rectangle and either the length or​ width, find the unknown measurement using the appropriate formula.
Yuki888 [10]

p = 2l + 2w
P=Perimeter
L=Length
W=Width

Hints given are P= 76, L=20 so 2L=40

76=40+2w
76-40=2w
36=2w
18=w

8 0
3 years ago
Read 2 more answers
The largest ball of yarn ever created has a radius of 6 feet. It took 30 years to create.
ch4aika [34]

Answer:

904.32 cubic ft

Step-by-step explanation:

To find the volume of a sphere, the formula is 4\pi\frac{r^3}{3}

First, 3.14 * 4 for 12.56.

The radius is 6, and that cubed is 216.

After that, divide 216 by 3 for 72

Then, 12.56 times 72, which gets you the final answer of  904.32 cubic ft.

(10 * 72) + (2 * 72) + (0.5 * 72) + (0.06 * 72)

720 + 144 = 864

864 + 36 = 900

900 + 4.32 = 904.32

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3 years ago
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the temperature at noon on a monday in december was -11°c. by noon on tuesday it has warmed by 17°c. what was the temperature at
Annette [7]
0centigrade anwser gotme
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3 years ago
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