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Naya [18.7K]
3 years ago
9

5. (9r 3 + 5r 2 + 11r) + (-2r 3 + 9r - 8r 2)

Mathematics
1 answer:
ad-work [718]3 years ago
3 0

Answer:

7r³ - 3r² + 20r

Step-by-step explanation:

(9r³ + 5r² + 11r) + (-2r³ + 9r - 8r²)

You can get rid of the parentheses since there is nothing to distribute.

9r³ + 5r² + 11r - 2r³ + 9r - 8r²

Combine like factors.

7r³ - 3r² + 20r

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Abstract Reasoning Classify the angles that result from bisecting each type of angle.
Nadusha1986 [10]

The angles that will be formed when each angle type is bisected can each be classified as:

A. Two acute angles.

B. Two acute angles (45 degrees each).

C. Two acute angles (less than 90 degrees)

D. Two right angles (90 degrees each).

<h3>What are the Measure of the Special Angles?</h3>

An acute angle has a measure that is less than 90 degrees.

A right angle has a measure that is equal to 90 degrees.

The measure of an obtuse angle is equal to an angle measure that is greater than 90 degrees but less than 180 degrees.

The measure of a straight line angles equals 180 degrees.

With the above knowledge, we can determine what type of angle would be formed when each of the angle type is bisected. When an bangle is bisected, it is divided into two equal parts.

A. Bisecting an acute angle will result into two acute angles.

B. Bisecting a right angle will result into two acute angles (45 degrees each).

C. Bisecting an obtuse angle will result into two acute angles (less than 90 degrees)

D. Bisecting an straight angle will result into two right angles (90 degrees each).

Learn more about the angles on:

brainly.com/question/25716982

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6 0
2 years ago
Solve the following inequality algebraically.<br> x + 2 &lt; 11
Pachacha [2.7K]

Answer:

x < 9

Step-by-step explanation:

Subtract 2 from both sides so you can isolate the variable on the left.

7 0
3 years ago
What is 0.8% of $5200
WARRIOR [948]
The answer is:  $ 41.60  .

________________________________

0.8            $ 5200  
____  *    ______  =    0.8 * $ 52 =   $ 41.60 .
100              1 

______________________________________________
3 0
3 years ago
Help me please 10 ////////////////
madam [21]

Answer:

part A is 120

Step-by-step explanation:

6 × 20 = 120

part B

3 0
3 years ago
Read 2 more answers
An element with mass 210 grams decays by 8.3% per minute. How much of the element is remaining after 15 minutes, to the nearest
GarryVolchara [31]

Answer:

57.2\ g

Step-by-step explanation:

In this problem we have a exponential function of the form

f(x)=a(b^x)

where

f(x) is the remaining mass of the element in grams

x is the time in minutes

a is the initial value (y-intercept of the exponential function)

b is the base

r is the rate

b=(1+r)

In this problem we have

a=210\ g

r=-8.3\%=-8.3/100=-0.083 ---> is negative because is a decay's rate

b=(1-0.083)=0.917

substitute

The exponential function is equal to

f(x)=210(0.917^x)

For x=15 minutes

substitute in the function

f(x)=210(0.917^15)

f(x)=57.2\ g

4 0
3 years ago
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