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3 years ago

PLEASE HELP!!! Will give brainliest

Mathematics

2 answers:

Dvinal [7]3 years ago

5 0

Answer:

times each other

Step-by-step explanation:

times by each other

Tcecarenko [31]3 years ago

3 0

For perimeter just add the sides up.
a) P = 57 + 41 + 57 + 41 = 196 in
Ignore the 36 because it is not an edge
b) P = 56 + 73 + 92 = 221 in

For areas look for measurements at right angles and multiply them.
a) A = 57 x 36 = 2052 in^2
b) A = 1/2 x 56 x 73 = 2044 in^2
The half is needed because all triangles are half the area of a rectangle.

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Pi/6 is the reference angle for:

Ksju [112]

Option B. 13π/6 and Option D. 5π/6

To get the reference angle π/6 for the given angles we will check each angle given in the options.
A. 8π/6
Since 8π/6 means 240° which lies in 3rd quadrant. Therefore reference angle of 240°= 240-180 = 60° or π/3
B. 13π/6
13π/6 means 390° which lies in first quadrant.
Therefore reference angle = 390-360 = 30° or π/6
C. 3π/6
Since 3π/6 means 90° therefore reference angle of 90° is the same as 90°.
Or the reference angle is = π/2
D. 5π/6
5π/6 means angle is 150° which lies in second quadrant therefore reference angle of 150° = 180-150 = 30° or π/6
answer is Option B and D.

8 0

2 years ago

Zander wants to find out what the most popular sporting event is in the district’s high schools. He surveys a sample of the popu

Leokris [45]

Answer:

Surveying a sample would be valid if the population contains a diverse group of people.

7 0

3 years ago

Read 2 more answers

In ∆ABC, point D is the centroid. If (AE) ̅=15, (BF) ̅=27, and (CD) ̅=8, find the following lengths

Anna71 [15]

Answer:

5,18,12 cms are the answer.

Step-by-step explanation:

Given is a triangle ABC. Point D is the centroid.

E,F and G are midpoints of CB, BA and AC respectively.

AE, BF and CG are medians of the triangle.

We know that centroid divides the median in the ratio 2:1

Using this we find that AD:DE = 2:1

Or AD+DE:DE = (2+1):1

AE:DE =3:1

15:DE = 3:1 . Hence DE =5 cm.

On the similar grounds we find that DF = 1/3 BF = 9

Hence BD = DF-BF = 27-9 =18 cm

and also

CG = 3/2 times CD = 12 cm.

7 0

3 years ago

Write a cubic function whose graph goes through the points: (-5, 0) (1, 0) (2, -2) (4, 0)

Free_Kalibri [48]

Answer:

f(x) = $\frac{1}{7}(x+5)(x-1)(x-4)$

Step-by-step explanation:

Let the equation of the give cubic function is,

f(x) = p(x - a)(x - b)(x - c)

Here, a, b, c and d are the x-intercepts of the given graph.

Since, x-intercepts given in the graph are x = -5, 1 and 4,

Equation of the curve will be,

f(x) = p(x + 5)(x - 1)(x - 4)

Since, the graph of this function passes through (2, -2) also

-2 = p(2 + 5)(2 - 1)(2 - 4)

-2 = -p(14)

p = $\frac{2}{14}$

p = $\frac{1}{7}$

Therefore, equation will be,

f(x) = $\frac{1}{7}(x+5)(x-1)(x-4)$

5 0

3 years ago

Will mark brainliest

ikadub [295]

Answer:

3rd choice

Step-by-step explanation:

(7y^6)(2y^-4)^2

= (7y^6)(4y^-8)

Calculate:

(7y^6) * (4y^-8)

28y^-2

Express with a positive exponent:

28 * 1/y^2

8 0

3 years ago