1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Igoryamba
3 years ago
10

HELP ;-; plz khan academy

Mathematics
2 answers:
dimulka [17.4K]3 years ago
6 0

Answer:

-15r^2 + 2r +8

Step-by-step explanation:

Simply add the values together and you have a simplified equation. Now you can plug in any value for "r."

musickatia [10]3 years ago
5 0

Answer:

- 15r² + 2r + 8

Step-by-step explanation:

M + T

= - 8r² + 11r - 6 - 7r² - 9r + 14 ← collect like terms

= (- 8r² - 7r²) + (11r - 9r) + (- 6 + 14)

= - 15r² + 2r + 8

You might be interested in
SinA=√1-x÷√1+X<br> Find the value of cosA
Irina-Kira [14]

The value of cos A is √(1 + x²)/ (1 - x²) /√1 + x

<h3>Trigonometric ratios</h3>

It is important to note that

sin A = opposite/ hypotenuse

cos A = adjacent/ hypotenuse

Then,

opposite = \sqrt{1} - x

Hypotenuse = \sqrt{1} + x

Let's find the adjacent side using the Pythagorean theroem

(\sqrt{1} + x)^2 = (\sqrt{1 -x } )^2 + x^2

1 + x^2 = 1 - x^2 + x^2

x = \sqrt{\frac{1 + x^2}{1 -x^2} }

cos A = x/hypotenuse

cos A = \frac{\sqrt{\frac{1+x^2}{1 -x^2} } }{\sqrt{1} +x}

cos A = √(1 + x²)/ (1 - x²) /√1 + x

Thus, the value of cos A is √(1 + x²)/ (1 - x²) /√1 + x

Learn more about trigonometric identities here:

brainly.com/question/7331447

#SPJ1

6 0
2 years ago
Whats 4 + 2 i forgot,<br> and whats 5 + 5 + 9 + 8 + 90+ 90 - 1000 i also forgot
Vlad [161]

Answer:

4 + 2 = 6

5 + 5 + 9 + 8 + 90+ 90 - 1000 = -793

Step-by-step explanation:

hope this helps ;)

have a great day!! <3

8 0
3 years ago
What is the volume of a sphere with an 18 inch diameter ?
photoshop1234 [79]
18 inch diameter = 9 inch radius
Sphere Volume   = <span>  4/3 • <span>π <span>• r³
</span></span></span><span>Sphere Volume   = <span>  4/3 * PI * 9^3
</span></span><span>Sphere Volume   = <span>  4/3 * PI * 729
</span></span><span><span>Sphere Volume   =   </span>3,053.628 </span>




3 0
4 years ago
Read 2 more answers
A store had 300 empty shelves. Each shelf could hold 20 cans. What is the total number of cans the shelves could hold?
Debora [2.8K]

Answer:

it can hold 6000 cans

Step-by-step explanation:

brainliest plz

3 0
3 years ago
Read 2 more answers
What’s the answer because I’m confused
Scilla [17]

Answer:

i hate Maths

7 0
3 years ago
Other questions:
  • Paul used 3/4cup of butter in a batch of brownies. He ate 1/6 of the batch of brownies. What fraction of a cup of butter did he
    10·1 answer
  • a company borrowed 25,000 and was charges 3.5% and was charged 2,625 in interet...how long was it before the company repaid the
    11·1 answer
  • You are given the coordinates of four points that are the vertices of a parallelogram. You need to determine if the parallelogra
    14·1 answer
  • Reduce to lowest terms 4x^3y^4/-8xy^2
    8·1 answer
  • A coin is tossed 5 times. Find the probability that none are heads. Find the probability that at most 2 are heads.
    14·1 answer
  • Combining Like Terms: (Simplify the following.)<br><br> (x - 5) ( -2) + 11x
    14·1 answer
  • Sketch a graph of the relation y+4=2(x-3)
    6·1 answer
  • The first decision is a choice between
    7·2 answers
  • 6. how is twice a number decrease by three is negative seven written as a question A. 2+×_3=7 B. 2×_3=7 C. ×2-3=7 D. (×-3)2=-7​
    14·1 answer
  • A larger kind of bacteria is about 0.00039 in. long. Write this length using<br> scientific notation
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!