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Gnom [1K]
3 years ago
8

Math assignment test please help

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
5 0

Answer:

12x+15y

Step-by-step explanation:

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Add the polynomials.<br><br> (x2−11x+6)+(x2+5)
Oksana_A [137]

Answer:

\boxed{2 {x}^{2}  - 11x + 11}

Step-by-step explanation:

=  > ( {x}^{2}  - 11x + 6) + ( {x}^{2}  + 5) \\  \\  =  >  {x}^{2}  - 11x + 6 +  {x}^{2}  + 5 \\  \\  =  >  {x}^{2}  +  {x}^{2}  - 11x + 6 + 5 \\  \\  =  > 2 {x}^{2}  - 11x + 11

8 0
2 years ago
Read 2 more answers
Can someone please give me the answers?
kirza4 [7]
Find all the areas and add them together 
Base Rectangle : LxW  = 14 x 12 = 168
Bases Triangles (2)  2x (8x12)/2 = 96
2 Lateral rectangles 14x10 =140 (double) = 280

Surface Area = 168 +96 + 280 = 544

7 0
3 years ago
The circumference of a standard baseball is about 9in. About how many square inches of horsehide are required to cover 100 balls
Marta_Voda [28]
This is the concept of area of solid materials, we are required to calculate the total area of horsehide that is required to cover 100 balls with each having a circumference of 9 in.
The area of hide required will be given by:
area=(area of each ball)*(total number of balls)
area of each ball is given by:
SA=4πr^2
given that the circumference is 9in, we are required to find the radius of the ball
Circumference, c=2πr
thus;
9=2πr
r=9/(2π)
r=1.4 in
Therefore the surface area will be:
SA=4π*1.4^2=24.6 in^2
Therefore the area of horsehide required to cover 100 balls will be:
Area=24.6*100=2,460 in^2.
5 0
3 years ago
The mass of an electron is approximately 9 × 10-28 grams, while the mass of a neutron is approximately 2 × 10-24 grams. Which of
aalyn [17]

Answer: the mass of a neutron is approximately 2,000 times the mass of an electron

Step-by-step explanation:

- the easiest way to solve this (in my opinion) is to simply divide the mass of a neutron by the mass of an electron

- 2 x10^{-24} / (9 x10^{-28} )

=  (2/9) x10^{-24--28}

=  (2/9)x10^{-24+28}

≈  0.2222x10^{28-24}

≈ 0.2222x10^{4}

≈ which is approximately 2222    

- so 2222 is approximately 2000 times

- therefore, the mass of a neutron is approximately 2,000 times the mass of an electron

hope this helps :)

4 0
2 years ago
Read 2 more answers
What is the best way to prep for math during the summer?
Phoenix [80]

Answer:

https://www.khanacademy.org

Step-by-step explanation:

Khan Academy is free and you can choose by grade level or course. It's a personalized learning experience with videos and practice exercises that includes progress tracking.

6 0
3 years ago
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