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nikklg [1K]
3 years ago
9

A county government says that a safe level of chlorine in a hot tub is within 1.75 ppm of 3.25 ppm.

Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Answer:

Let  y represents the maximum variation in the level of chlorine,

Given,

Level of chlorine in a hot tub is within 1.75 ppm of 3.25 ppm.

So, the standard level of chlorine = 1.75 + y or 3.25 - y

⇒ 1.75 + y = 3.25 - y

⇒ 2y = 5

⇒ y = 2.5

Thus, the standard level would be 2.5 ppm,

If x represents the present level of chlorine,

Then it would be lie within 1.75 ppm of 3.25 ppm.

If the difference between x and standard level ≤  Maximum variation

⇒ |x-2.5| ≤ 0.75

Which is the required  absolute value inequality to represent this situation.

b. If x = 1.0 ppm,

Since |1.0-2.5|=1.5 which is not less than equal to 0.75,

Hence, he should add more chlorine.

Step-by-step explanation:

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A base angle of an isosceles triangle measures 30, and the length of one of the legs is 12. What is the length of the altitude d
AfilCa [17]

Answer: 6

Step-by-step explanation:

From the question, a base angle of isosceles triangle is 30°.We are also informed that one of the legs is 12. The altitude is opposite to the angle having a measure of 30°. The hypoteneous in the right angled triangle which is formed by drawing the altitude is 12. This will be calculated as:

Sin = opposite/hypotenuse

Sin 30°=length of the altitude/12

Note that sin 30° = 0.5

0.5 = length of the altitude/12

length of the altitude = 12 × 0.5

Hence, length of altitude = 6

5 0
3 years ago
I NEED HELP :_( Which of the following points is in the solution set of y > -x∧2 + 5? (0, 5) (2, 4) (1, 3)
marysya [2.9K]

Answer:

\huge\boxed{(2;\ 4)}

Step-by-step explanation:

We have

y>-x^2+5

Put the coordinates of the given points and check the inequality:

For (0; 5) → x = 0; y = 5

5>-0^2+5\\5>0+5\\5>5\qquad\bold{FALSE}

For (2; 4) → x = 2, y = 4

4>-2^2+5\\4>-4+5\\4>1\qquad\bold{TRUE}

For (1; 3) → x = 1, y = 3

3>1^2+5\\3>1+5\\3>6\qquad\bold{FALSE}

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3 years ago
A group of 3 children and 2 adults pay a total of $120 to take a karate class. A group of 5 children and 1 adult take the same k
sleet_krkn [62]

Answer:

215

Step-by-step explanation:

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2 years ago
9. John drives a total of 16.5 miles to and from his friend's house. He visited his friend
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The answer is d he traveled 198 miles over the span of 12 months driving to his friends house.
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3 years ago
Question 3 (5 points)
Vedmedyk [2.9K]

A quadrilateral that has all congruent sides and all right angles is known as a square.

Given is a quadrilateral with all right angles and congruent sides.

<h3>What is a Quadrilateral?</h3>

A four-sided polygon having four sides and four corners is referred to as a quadrilateral in geometry .

<h3>What are Congruent sides?</h3>

Congruent sides refers to a figure's sides being equal to one another.

We know that,

A square is a quadrilateral with angles that are each 90 degrees.

Additionally, a square has four equal sides, making it a quadrilateral having all  sides congruent.

As a result, a square is a quadrilateral with congruent sides and all right angles.

Learn more about quadrilateral here:

brainly.com/question/16691874

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4 0
1 year ago
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