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4 years ago

Can you please help me

Mathematics

1 answer:

finlep [7]4 years ago

3 0

Answer:

x=10

Step-by-step explanation:

8x+10=6x+30

8x-6x=30-10

2x=20

x=10

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Isabella has a 22 ounce cola. She drinks 17 ounces. Enter the percentage of ounces Isabella has left of her cola. Round your ans

jenyasd209 [6]

Answer:

22.73% of ounces Isabella has left of her cola.

Step-by-step explanation:

Given:

Isabella has a 22 ounce cola. She drinks 17 ounces.

Now, to find the percentage of ounces Isabella has left of her cola.

Total ounces of cola = 22.

Ounces of cola Isabella drink = 17.

So, the ounces of cola she left:

Total ounces of cola - ounces of cola Isabella drink.

$=22-17$

$=5\ ounces.$

Thus, 5 ounces of cola she left.

Now, to get the percentage of cola she left:

$\frac{5}{22}\times 100$

$=\frac{500}{22}$

$=22.727\%.$

Rounding the percentage to the nearest hundredths is 22.73%.

Therefore, 22.73% of ounces Isabella has left of her cola.

7 0

3 years ago

Doreen schmidt is a chemist. She needs to prepare 36 ounces of a 10% shydrochloric acid solution. Find the amount of 18% solutio

emmainna [20.7K]

Total = 36oz
Amount of 18% solution = x
Amount of 9% solution = 36 - x

Using the fact that (amount of solution) * (percent HCl) = amount HCl we can set up an expression for the amount HCl in a mixture of 18% and 9% solutions with a total volume of 36oz.

Amount of HCl = x*0.18 + (36 - x)*0.09

If we divide this by the amount of solution we get percent HCl, and we have a target of 10% HCl. Now we have an equation to solve,

[x*0.18 + (36 - x)*0.09]/36 = 0.1

x*0.09 + 3.24 = 3.6

.09x = 0.36
x = 4

Therefore,
4 ounces of 18% HCl solution and 32 ounces of 9% HCl solution

Check:
[(4*.18) + (.09*32)]/36 = 0.1?
0.1 = 0.1 Yes.

5 0

3 years ago

Solve for X: 1.) 3x-4=6x+5 2.) 3x-4=6x+5 3.) -2(1+7x) = -100 4.) x - 1 + 3= - 2- x

TiliK225 [7]

Answer:

1) -3

2) -3

3) 7

4) -2

4 0

3 years ago

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A scuba diver is 240 feet below sea level and descends 50 feet further down to observe the sea life.

taurus [48]

Answer:

The new position is 190 feet below sea

Step-by-step explanation:

240-50=190

8 0

3 years ago

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Lori entered a 100 km race. A Kilometer is about of a mile. About how many miles ling is the race?

djverab [1.8K]

Answer:

About 62.1371

Step-by-step explanation:

6 0

3 years ago

Can you please help me ​

Can you please help me