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son4ous [18]
3 years ago
11

Help me with this question please

Mathematics
1 answer:
Leokris [45]3 years ago
4 0

Answer:

14s^4-7s^2+15

Step-by-step explanation:

At the beginning the only bracket that is changing is the 3rd one because of the minus. (12s^4-6s^2+4s)+(6s^4-4s+27)-4s^4+s^2+12 then open the rest of the brackets. And start calculating.i will just to show you which ones u calculate together. (I'll separate the numbers depending on what they're squared to).

12s^4+6s^4-4s^4=14s^4

-6s^2-s^2=7s^2

27-12=15

All together is 14s^4-7s^2+15

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A student increased in height from 1.52m to 1.68m, calculate the percentage increase (show your working)
Sladkaya [172]

The percentage increase in the student's height is 10.52%.

Here we are given that a student's height increases from 1.52m to 1.68m.

Thus, the absolute increase in the student's height will be-

1.68 - 1.52 = 0.16 meters.

Now, we need to find the percentage increase in the student's height.

The formula for calculating percentage increase is given by-

Percentage increase = change in value/ initial value * 100

Here, the change in value is 0.16 meters and the initial value is 1.52 meters.

Thus, percentage increase in height = 0.16 / 1.52 *100

= 1600/ 152

= 400/ 38

= 200/ 19

= 10.52%

Thus, the increase in the student's height is 10.52%.

Learn more about percentage change here-

https://brainly.in/question/19592355

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6 0
2 years ago
Thanks for helping...
slava [35]

Answer:

16

Step-by-step explanation:

Subtracting the given expressions, that is

3b² - 8 - (b(b² + b - 7) ) ← simplify parenthesis

= 3b² - 8 - (b³ + b² - 7b) ← distribute parenthesis by - 1

= 3b² - 8 - b³ - b² + 7b ← collect like terms

= - b³ + 2b² + 7b - 8 ← substitute b = - 3

= - (- 3)³ + 2(- 3)² + 7(- 3) - 8

= - (- 27) + 2(9) - 21 - 8

= 27 + 18 - 21 - 8

= 16

7 0
3 years ago
100 points
icang [17]

#1

m<LOM=m<JKL

  • Similar corresponding bisector angles

#2

Linear pair .

#3.

Complementary angles

#4

Angle bisector theorem

#5

Similarity theorem

7 0
3 years ago
Read 2 more answers
Find the length of the missing side. If the side length is irrational, round to the nearest tenth. ​
Readme [11.4K]

Answer: 17m

Step-by-step explanation: Because if you look on the right side of the triangle you can clearly see that the bottom of the triangle is exactly alike the right side. hope this is correct

5 0
3 years ago
Read 2 more answers
If the answer isn’t an integer express in simplest radical form
Scorpion4ik [409]

Answer:

x =  \frac{20}{ \sqrt{3} }  \\ y =  \frac{40}{ \sqrt{3} }

Step-by-step explanation:

for \:  \: x \\  \tan(60)  =  \frac{20}{x}  \\  \sqrt{3} =  \frac{20}{x}   \\ x =  \frac{20}{ \sqrt{3} }  \\ \\  for \: y \:  \\  \sin(60)  =  \frac{20}{y}  \\  \frac{ \sqrt{3} }{2}  =  \frac{20}{y}  \\  \sqrt{3} \:  y = 20 \times 2 \\ y =  \frac{40}{ \sqrt{3} }

I hope that is useful for you :)

7 0
3 years ago
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