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schepotkina [342]
3 years ago
13

Could someone please solve this and explain their answer? 2x+39<9

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
4 0

Step-by-step explanation:

i hope you understood....

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Which of the following shows that polynomials are closed under addition when two polynomials 4x2 − 8x − 7 and −5x + 16 are added
Artyom0805 [142]
First we have to combine like terms. 4x² is one term. -8x is another term. -7 is another term. poly = "many" ⇒ polynomial = many terms

(4x² - 8x - 7) + (-5x + 16)

4x² - 8x - 7 - 5x + 16

Combine like terms.
Step 1: 4x² has no other terms with x² so it stays by itself.
Step 2: -8x and -5x are like terms because they both have x.
So -8x -5x = -13x (You put two negatives together)
Step 3: -7 and 16 don't have any x with them. -7 + 16 = 16 - 7 = 9

Now we put all the answers of the steps together.
Step 1: 4x²
Step 2: -13x
Step 3: 9

So the answer is 4x² - 13x +9
And it's a polynomial because there are three terms = "more than one term"

4 0
4 years ago
Find the sum of the infinity of the Gp <br>3, 3/10, 3/100 <br>pls i need a step by step solution ​
Over [174]

Answer:

Step-by-step explanation:

d the sum of the infinity of the Gp  

3, 3/10, 3/100  

pls i need a step by step solution ​

Ask for details FollowReport by Jomilojuangel

7 0
3 years ago
Identify the next three terms in the arithmetic sequence 4.2, 4.8, 5.4, 6.0,...
Airida [17]
6.6, 7.2, 7.8 Hopefully I helped, if this was not what you were looking for tell me, I will try my best
8 0
3 years ago
A boy walked to his friend house 12 miles away. If he averaged 2.5 miles per hour, how many hours did it take to reach the house
solniwko [45]
Hello there,

Friends house: 12 miles
Average: 2.5 mph

Write a proportion...

12/x = 2.5/1

Cross multiply and divide...

12 * 1 = 12

12/2.5 = 4.8 hours

Convert that into time...

4.8 hours or 5 h 20 m


Hope I Helped!!
-Char

6 0
3 years ago
Read 2 more answers
Find the value of tan30+cot30+sin60​
Aliun [14]

Hello!

This is a problem about relating values of the Unit Circle.

First, we need to figure out the specific "points" of each angle measure of 30 and 60.

For the angle measure 30, the point will be (\frac{\sqrt{3}}{2},\frac{1}{2}).

For the angle measure 60, the point will be (\frac{1}{2},\frac{\sqrt{3}}{2}).

The tangent value of a point will be its y value over its x value.

\frac{\frac{1}{2}}{\frac{\sqrt{3}}{2}}=\frac{1}{2}*\frac{2}{\sqrt{3}}=\frac{1}{\sqrt{3}}=\frac{\sqrt{3}}{3}

The cotangent value of a point will be the reciprocal of the tangent value, which we found previously.

\frac{3}{\sqrt{3}}=\frac{3\sqrt{3}}{3}=\sqrt{3}

The sine value of a point will be the y value of the point.

\frac{\sqrt{3}}{2}

So the values we have so far are \frac{\sqrt{3}}{3}+\sqrt{3}+\frac{\sqrt{3}}{2}

Now we have to find the LCD to add these together, which in this case would be 6.

\frac{2\sqrt{3}}{6}+\frac{6\sqrt{3}}{6}+\frac{3\sqrt{3}}{6}

Which adds up to \frac{11\sqrt{3}}{6}, which is in simplest radical form.

Hope this helps!

8 0
3 years ago
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