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Nookie1986 [14]
2 years ago
7

Simplify (3x^2-y)^2. please

Mathematics
1 answer:
In-s [12.5K]2 years ago
8 0
9x^4+y^2-6yx^2
Hope it helped
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Sin15°+tan65°=cot25°+cos75°​
kifflom [539]

Step-by-step explanation:

L.H.S =

sin15°+tan65°

sin(90°-75°)+tan(90°-25°)

cos75°+cot25°

or; cot25°+ cos75°. R.H.S

6 0
2 years ago
Hi! can someone help me find the value of x?​
Furkat [3]

Answer:

x=2

Step-by-step explanation:

Since the angles are equal, the side lengths are equal  (isosceles triangle)

12 =6x

Divide by 6

12/6 = 6x/6

2= x

5 0
3 years ago
4. Using the formula for the volume of a cylinder, , find h when V = 141.3 and r = 3. Use pi = 3.14.
olya-2409 [2.1K]

\text{The formula of a volume of a cylinder}\\\\V=\pi r^2h\\\\\text{We have}\ V=141.3\ \text{and}\ r=3.\ \text{Substitute}\\\\\pi(3^2)h=141.3\\\\9\pi h=141.3\qquad|\text{divide both sides by}\ 9\pi\\\\h=\dfrac{141.3}{9\pi}\qquad|\text{use}\ \pi\approx3.14\\\\h=\dfrac{141.3}{9\cdot3.14}\\\\h=\dfrac{141.3}{28.26}\\\\\boxed{h=5}

5 0
3 years ago
A driver education course
Kobotan [32]

Answer:

  1. after 4.5 months (or 5)
  2. $795

Step-by-step explanation:

10% of $100 per month is $10 per month.

1. By saving $10 per month on insurance cost, Dan's savings after 4.5 months will be equal to the $45 cost of his course. (If billing is monthly, he won't experience any net gain from the course until the 5th insurance payment--after 5 months.)

__

2. In 7 years, the savings on insurance costs will total ...

  (7 years)×(12 months/year)×($10 /month) = $840

His cost for the course is $45, so his net saving is ...

  $840 -45 = $795 . . . net saving by age 25

8 0
3 years ago
Find the mode of the following data<br> Stem: 2,3,4,5<br> Leaves: 8,1,1,6,0,2,4,3,5
Fittoniya [83]
One 1 because it has occured twice in the question. 
7 0
3 years ago
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