4 years ago

I need help on all r questions I answered right

Mathematics

1 answer:

yaroslaw [1]4 years ago

4 0

Show the problems my guy

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(2-cos^2A)(1+2cot^2A)=(2+Cot^2A)(2-sin^2A)

fomenos

Answer:

2 sin (2A) cos (2A)^4 + 2cos (2A)

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sin (2A)

Step-by-step explanation:

7 0

3 years ago

Which functions have an axis of symmetry of x = -2? Check all that apply. A. f(x) = x^2 + 4x + 3 B. f(x) = x^2 - 4x - 5 C. f(x)

Snowcat [4.5K]

Answer:

A. f(x) = x^2 + 4x + 3

D. f(x) = -2x^2 - 8x + 1

Step-by-step explanation:

The axis of symmetry is found by h = -b/2a where ax^2 +bx +c

A. f(x) = x^2 + 4x + 3

h = -4/2*1 = -2 x=-2

B. f(x) = x^2 - 4x - 5

h = - -4/2*1 = 4/2 =2 x=2 not -2

C. f(x) = x^2 + 6x + 2

h = -6/2*1 = -3/2 = x=-3/2 not -2

D. f(x) = -2x^2 - 8x + 1

h = - -8/2*-2 = 8/-4 =-2 x=-2

E. f(x) = -2x^2 + 8x - 2

h = - 8/2*-2 = -8/-4 =2 x=2 not -2

7 0

3 years ago

Becca's new tent is in the shape of a pyramid with a square base. When the tent is fully assembled, it has a height of 72 inches

nekit [7.7K]

Volume= 55,296 in^3
(WORK SHOWN BELOW)

7 0

3 years ago

If you can just help me with one question it would help very very much:)

Soloha48 [4]

1) a.30
3) complementary: 12 and 78
supplementary: 102 and 78

6 0

3 years ago

You and your friend each deposit $50 in separate savings accounts. Your account earns 2% simple annual interest. Your friend’s a

d1i1m1o1n [39]

Answer:

I am will take 20 years to get 20$

My friend will take 10 years to get 20$

Step-by-step explanation:

$Let \: the \: no. \: of \: years : x \\ \\ for \: me \\ x \times (50 \times 2\%) = 20 \\ x \times 1 = 20 \\ x = 20 years\\ for \: my \: friend \\ x \times (50 \times 0.04) = 20 \\ 2x = 20 \\ x = 10 \: years$

I hope this is be good for you and I want this money

7 0

3 years ago