3 years ago

Which of the following can be used as another name for the quadrilateral ABCD? *

Mathematics

1 answer:

White raven [17]3 years ago

8 0

Option b is the correct answer

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Find the number of possible positive real zeros of f(x)= -7x^4+ 49x^3+ 84x^2.

Solnce55 [7]

B.Two is your answer

5 0

3 years ago

12. Write the equation of a parabola with vertex at<br> (2, -3) and focus at (2,5),

Tatiana [17]

Step-by-step explanation:

The basic form of equation:

(x-h)²=4a(y-k),

(h,k)=coordinates of vertex

(h, k+a) = coordinate of focus

For given parabola:

axis of symmetry: x=2

(h, k) =(2,-3)

(h, k+a)=(2,5)

k+a=5

-3+a=5

a=8(distance from vertex to focus on the axis of symmetry)

equation: (x-2)²=4×8(y+3)

(x-2)²= 32(y+3)

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3 years ago

What is the correct definition for tan 0

Reptile [31]

$tan\theta=\frac{sin\theta}{cos\theta}\\\\\\Look\ at\ the\ picture.\\\\In\ a\ right\ triangle:\\\\sin\theta=\frac{a}{c};\ cos\theta=\frac{b}{c};\ tan\theta=\frac{a}{b}\\\\\frac{sin\theta}{cos\theta}=\frac{\frac{a}{c}}{\frac{b}{c}}=\frac{a}{c}\times\frac{c}{b}=\frac{a}{b}=tan\theta$