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zavuch27 [327]
3 years ago
14

Who is the richest president in the world​

Mathematics
1 answer:
olga55 [171]3 years ago
3 0

The richest president in the world is Sebastian Pinera, President of Chile with $2.4 billion.

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A scientist mixes water (containing no salt) with a solution that contains 30% salt. She wants to obtain 180 ounces of a mixture
xxMikexx [17]

Answer:

water : 90 ounces

salt solution: 90 ounces

Step-by-step explanation:

Call w the amount of water and call the solution containing 30% salt.

We want to get 180 ounces of a mixture with 15% salt.

So:

The amount of mixture will be:

w + s = 180

the amount of salt will be

0w + 0.3s = 180 * 0.15

0.3s = 27

s = 90\ ounces

Now we substitute the value of s in the first equation and solve for w

w + 90 = 180

w = 90\ ounces

5 0
3 years ago
(x+1)/(x+2)=3/4<br>Solve the equation​
ivann1987 [24]
4(x+1)=3(x+2)

4x+4=3x+6

4x-3x=6-4

X=6-4

Answer is X=2
6 0
3 years ago
Roberto wants to estimate the answer to this problem to see if his answer is reasonable.
marusya05 [52]
5849 rounded to the nearest hundred
- The number '8' is located in the hundreds place
- Since there is a '4' in the tens place, it's telling number '8' to stay the same
5849 ⇒ 5800

2621 rounded to the nearest hundred
- The number '6' is located in the hundreds place
- Since there is a number '2' in the tens place, it's telling number '6' to stay the same
2621 ⇒ 2600

Answer: 5800 - 2600
6 0
3 years ago
????????????????????????????????????????????????????????????????????????????????????????????
ohaa [14]

Answer: A is first

Step-by-step explanation:

3 0
3 years ago
What does the variable r represent in the equation 10r+4=8
Kryger [21]

Answer:

The value of variable r in the equation 10r+4=8 is \mathbf{r=0.4}

Step-by-step explanation:

We need to find the value of variable r in the equation 10r+4=8

Step 1: Write the equation

10r+4=8

Step 2: Subtract 4 on both sides

10r+4-4=8-4\\10r=4

Step 3: Divide both sides by 4

\frac{10r}{10}=\frac{4}{10}\\r=0.4

So, The value of variable r in the equation 10r+4=8 is \mathbf{r=0.4}

3 0
3 years ago
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