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Darya [45]
3 years ago
9

Someone please help.. You will receive lots of medals in the future because of people looking this question up and giving you me

dals
Matt did an experiment to study the solubility of two substances. He poured 100 mL of water at 20 °C into each of two beakers labeled A and B. He put 50 g of Substance A in the beaker labeled A and 50 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.

Part 1: Which, if any, substance is soluble in water?
Part 2: Explain how the data helped you determine solubility for both substances for temperatures 20 °C to 80 °C.

Mathematics
1 answer:
kotegsom [21]3 years ago
7 0
Part 1: I'm pretty sure B is soluble in water.
Part 2: The data is showing that A isn't soluble at all (probably cause it's solid or a lipid or something) because the amount undissolved stays the same as B changes in solubility.
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Brilliant_brown [7]

Answer: 13%

Step-by-step explanation:

Step 1:

5000

10% of 5000=500

5% of 5000=250

25%=500+500+250= 1250 rupees

so...

5000-1250= 3750 INR, which is the original price, <u>BEFORE THE 25% WAS ADDED</u>

but..

They only want a 10% discount of the price which is 25% above the cost (5000). So essentially we want to find  15%, because 25%-10%=15%

so if...

10%=500

5%=250

15%=750 INR

this means the price with the 10% discount off 25%= 4250 INR (5000-750)

now we need to find the percentage change. For this we need to subtract the price with the 15% discount with the price BEFORE THE 25% was added

e.g 4250-3750= 500INR

Then.. divide this price with the original price before the 25% was added

e.g 500/3750= 2/15=0.13

So...

Convert 0.13 into a percentage=13%

The PERCENTAGE PROFIT of the owner is 13%

P.S Please could someone double check this answer as I am only 15 years old and may have gotten some working out wrong! Thank you

3 0
3 years ago
Question 17 PLEASE HELP given the function: f(x) =3x+7. Find the value of y when x=-8
STALIN [3.7K]

→Answer:

y = -17

→Step-by-step explanation:

Well first off the f(x) in the equation f(x) = 3x + 7 can also be written as y,

y = 3x + 7

So if x is -8 we need to plug it in for x and solve, simple as that :)

y = 3(-8) + 7

y = -24 +7

y = -17

8 0
3 years ago
Robert earned scores of 81, 93, 76, and 78 on four English tests. Determine his score on the
tekilochka [14]

Answer:

97

Step-by-step explanation:

81 + 93 + 76 + 78 + 97 = 425

425/5 = 85

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irakobra [83]

Answer:

Fiona will jogged 1,080 feet

Step-by-step explanation:

180 x 2 = 360 yards

360 x 3 = 1,080 feet

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If an average sunflower has 34 petals what is the best estimate for the total number of petals on 57 sunflowers
Nonamiya [84]

34 \times 57 = 1938
3 0
4 years ago
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