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3 years ago

Factor completely 3x^2 − 21

Mathematics

2 answers:

beks73 [17]3 years ago

7 0

When factor 3 out of 3x^2-21
you get 3(x^2-7)

Firdavs [7]3 years ago

5 0

The highest common factor of the two terms is 3, so that goes outside the bracket as 3(____). To get 3x^2, you multiply 3 by x^2, which is your first term in the bracket, and to get -21, you multiply 3 by -7, so your final answer is 3(x^2 - 7). I hope this helps!

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Someone Please help me answer this question.

Mekhanik [1.2K]

Answer:

see explanation

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Note ∠ Q is a right angle = 90°

Sum the angles and equate to 180

7b + 14 + 6b + 11 + 90 = 180, that is

13b + 115 = 180 ( subtract 115 from both sides )

13b = 65 ( divide both sides by 13 )

b = 5

Thus

∠ R = 6b + 11 = 6(5) + 11 = 30 + 11 = 41°

∠ S = 7b + 14 = 7(5) + 14 = 35 + 14 = 49°

∠ Q = 90°

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3 years ago

Simplify 4(7-10)^/(-6)-5*(-2)

trasher [3.6K]

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3 years ago

Find the volume of a right circular cone that has a height of 15.6 cm and a base with a radius of 7.8 cm. Round your answer to t

sergey [27]

Answer:

356.8cm3

Step-by-step explanation:

Volume of a cone= 1/3 * base area * height.

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Going forward; base area =pi * raduis * raduis [ area of a circle; the base is a circle]

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3 years ago

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Igoryamba

Answer: OPTION D.

Step-by-step explanation:

You can observe in the graph that represents f(x) that this function intersects the x-axis at the point (1,0). Then:

$x=1\\y=0$

We know that a function intersects the x-axis when $y=0$ .

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4 years ago

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