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Charra [1.4K]
3 years ago
12

What do I have to do in this math problem

Mathematics
1 answer:
Leona [35]3 years ago
6 0
I Cant See The Question Foreal
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Can u help me with these math problems
Vlada [557]

Answer:

Q3: A

Q4: 9x² + (-x) + (-3)

Step-by-step explanation:

Q3: C (63) => x = 63. => C(x) = 36 x 63

Q4: f(x) + g(x) = 7x² - 5x + 3 + 2x² + 4x - 6 = (7x² + 2x²) + (-5x + 4x) + (3 - 6) = 9x² + (-x) + (-3)

8 0
3 years ago
The amount of chlorine in a swimming pool is proportional to the volume of water. The pool has 2.5 milligrams of chlorine per li
stira [4]

Answer:

There are <u>20,000 milligrams</u> chlorine in the pool.

Step-by-step explanation:

Given:

The chlorine per liter of water in the pool is 2.5 milligrams.

The  volume of water in the swimming pool is 8000 gallons.

Now, to find the quantity of chlorine in the pool.

Let the quantity of chlorine be x.

The gallons of water in the swimming pool = 8000.

The milligrams of chlorine per liter of water in the pool = 2.5.

According to question, the amount of chlorine in the swimming pool is proportional to the volume of water.

So, 2.5 mg of chlorine is equivalent to 1 liter.

Thus, x is equivalent to 8000.

Now, to get the quantity of chlorine by using cross multiplication method:

\frac{2.5}{1} =\frac{x}{8000}

<em>By cross multiplying we get:</em>

20000=x\\\\x=20,000\ mg.

Therefore, there are 20,000 milligram chlorine in the pool.

6 0
3 years ago
Clara brought 24 donuts for the office. If 6 of them were chocolate, what percent of the donuts were chocolate
mafiozo [28]
To find the percent, you have to divide 24/6 
24/6 = 0.25
Now you convert 0.25 to a percent. 
So move the decimal point 2 places to the right. 
= 25 %
5 0
3 years ago
Read 2 more answers
Is LMN = OPQ? If so name the congruence postulate that applies
devlian [24]
<h2>Explanation:</h2><h2></h2>

The complete question is shown below. As you can see, we know that:

\triangle LMN \cong \triangle OPQ

Shapes are congruent if you can turn one into the other by moving, rotating or flipping. If any two triangles have matching side lengths, they're not necessarily congruent. The same happens if they have two matching side lengths, but If triangles have three matching side lengths, then they must be congruent. This is is known as the Side-Side-Side Postulate (SSS). Since in this problem corresponding sides measures the same, therefore we can say that the postulate that applies is:

B. Congruent - SSS

5 0
4 years ago
Determine the slope of a line that passes through A(-4, 7) and B(6,3)
Helga [31]

Answer:

m=\frac{-2}{5}

Step-by-step explanation:

<u>Use the formula:</u>

m=\frac{y_2-y_1}{x_2-x_1}

<u>Plug in the numbers (coordinates) given, like so:</u>

m=\frac{3-7}{6+4}

m=\frac{-4}{10}

<u>Simplify:</u>

<u />m=\frac{-2}{5}

7 0
4 years ago
Read 2 more answers
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