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vovangra [49]
3 years ago
6

Simplify -3 square root of 84x^3

Mathematics
1 answer:
morpeh [17]3 years ago
4 0
-6x (square root)21x

Hope this helps :)
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Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅?
Tom [10]

Answer: Option C is correct


Step-by-step explanation:

We know tha tCos(A-B) = cosA cosB + sinAsinB

Plugging A = 180 and B = Ф

cos(180-Ф)= cos180cosФ+sin180sinФ

                  = (-1) cosФ+ (0) sinФ   [ since cos180=-1 and sin180 =0]

                 = -cosФ + 0

                 = -cosФ

Therefore option C is the correct answer.        

6 0
3 years ago
Read 2 more answers
Determine whether the situation calls for a survey, an observational study, or an experiment.
Svetradugi [14.3K]

Answer:

B. \displaystyle observational\:study

Explanation:

Compare people who have lower comprehension intelligence quotients than others.

I am joyous to assist you anytime.

8 0
3 years ago
Choose a number sentence is that illustrates distribute property of multiplication over addition 2×7+8 = 2+7×2+8
Agata [3.3K]

Answer:

(b)\  2 * (7 + 8) = (2 * 7) + (2 * 8)

Step-by-step explanation:

Given

(a)\ 2 * (7 + 8) = (2 + 7) * (2 + 8)

(b)\  2 * (7 + 8) = (2 * 7) + (2 * 8)

(c)\ 2 * (7 + 8) = (2 * 7) + 8

Required

Which illustrates distributive property of multiplication over addition

The property states that:

a(b + c) = a * b + a * c

By comparison

a = 2\ b = 7\ c = 8

So, we have"

2(7 + 8) = 2 * 7 + 2 * 8

2(7 + 8) = (2 * 7) + (2 * 8)

4 0
3 years ago
A tangent to a circle at point A is given, and point A is an endpoint of a chord, which is the same length as radius of the circ
Nutka1998 [239]

Answer:

30°

Step-by-step explanation:

Call the other end of the chord point B and the center of the circle point O. Then triangle AOB is an equilateral triangle, since OA = OB = AB.

Angle OAB is the internal angle of that triangle, so is 60°. Since OA is perpendicular to the tangent line (makes an angle of 90°), The angle between the tangent line and the chord must be ...

90° - 60° = 30°

___

The other way you know this is that central angle AOB is 60°, and the tangent-to-chord angle is half that, or 30°.

_____

One way to remember the angle relationship between a tangent line and a chord is this:

Consider a point C on long arc AB. The measure of inscribed angle ACB is half the measure of central angle AOB, no matter where C is on the circle. (If C happens to be on the short arc AB, then central angle AOB is a reflex angle, but the relationship still holds.) Consider what happens when C approaches A. The angle at vertex C is still the same: 1/2 the measure of central angle AOB. This remains true even in the limit when points A and C become coincident and line AC is a tangent at point A.

6 0
3 years ago
(x²y³3)<br> What is the answer pls
Degger [83]

Answer:

x•x•y•y•y•3

Step-by-step explanation:

I think you would have to put it in expanded form so the answer I gave should be correct.

8 0
3 years ago
Read 2 more answers
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