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mixer [17]
4 years ago
11

A chemist needs a solution of tannic acid 70% pure. How much distilled water must he add to 5 gallons of acid which was 90% pure

to obtain the 70% solution?
Mathematics
2 answers:
maria [59]4 years ago
7 0

Answer: 1.4286 gallons

Step-by-step explanation: the equation would be:

0.9*5+0x=0.7(5+x)

then you can shorten it down to:

4.5=3.5+0.7x

subtract both sides by 3.5 and you end up with:

1=0.7x

divide both sides by 0.7 and you get 1.4286 gallons

Alborosie4 years ago
6 0
30; If you add and subtract these numbers you should get 30%
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Step-by-step explanation:

How many quart make 5 gallon

1 quart=0.25 gallon

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6 0
3 years ago
Solve the inequality −14a≥42, and write the solution in interval notation.
PSYCHO15rus [73]

The solutions to the inequality are (-∞, -3] or a ≤ -3 if the inequality −14a≥ 42 graph is shown in the picture.

<h3>What is inequality?</h3>

It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.

We have an inequality:

−14a ≥ 42

-a ≥ 3

a ≤ -3

a ∈ (-∞, -3]

Thus, the solutions to the inequality are (-∞, -3] or a ≤ -3 if the inequality −14a≥ 42 graph is shown in the picture.

Learn more about the inequality here:

brainly.com/question/19491153

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6 0
2 years ago
Which system of inequalities is shown?
Yuliya22 [10]

Answer:

B.

Step-by-step explanation:

The horizontal dashed line with shading above is y > 4.

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Answer: B.

3 0
2 years ago
Graph: f(x) = 2(2)<br>Click or tap the graph to plot a point.​
Lilit [14]

Here is what I got. I used the website called desmos. I hope this helped,.,

7 0
3 years ago
A rectangular lawn is 15 yards by 26 yards. It would cost $9.00 per yard to install a fence around the lawn. How much would it c
shutvik [7]

Answer: $738

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<em>Since it's $9 per yard, multiply:</em>

82 · $9 = $738

7 0
3 years ago
Read 2 more answers
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