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3 years ago

Help ASAP Ill mark u brainliest

Mathematics

1 answer:

aniked [119]3 years ago

5 0

Answer:

30% or none of these

Step-by-step explanation:

since least of the girls voted for biking it would be the least percent amount.

Hope this helped and have a wonderful day! <3 :))

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For 0 ≤ θ < 2 π what are the solutions to sin^2(θ) =2sin^2(θ/2)

gregori [183]

Recall the half-angle identity for sine,

sin²(x/2) = (1 - cos(x))/2

Then the given equation is identical to

sin²(θ) = 1 - cos(θ)

Also recall the Pythagorean identity,

sin²(θ) + cos²(θ) = 1

Then we rewrite the equation as

1 - cos²(θ) = 1 - cos(θ)

Factoring the left side, we have

(1 - cos(θ)) (1 + cos(θ)) = 1 - cos(θ)

and so

(1 - cos(θ)) (1 + cos(θ)) - (1 - cos(θ)) = 0

and we factor this further as

(1 - cos(θ)) (1 + cos(θ) - 1) = 0

which gives

cos(θ) (1 - cos(θ)) = 0

Then either

cos(θ) = 0 or 1 - cos(θ) = 0

cos(θ) = 0 or cos(θ) = 1

[θ = arccos(0) + 2nπ or θ = -arccos(0) + 2nπ]

… or [θ = arccos(1) + 2nπ or θ = -arccos(1) + 2nπ]

(where n is any integer)

[θ = π/2 + 2nπ or θ = -π/2 + 2nπ] or [θ = 0 + 2nπ]

In the interval 0 ≤ θ < 2π, we get three solutions:

• first solution set with n = 0 ⇒ θ = π/2

• second solution set with n = 1 ⇒ θ = 3π/2

• third solution set with n = 0 ⇒ θ = 0

So, the first choice is correct.

6 0

3 years ago

Monday the price of an online movie dropped $3 in the morning and then another $3 that afternoon.the following Monday morning th

Burka [1]

dropped $3 means "-3", increased $6 means "+6"

the price dropped twice so 2(-3) and increased once by 6

so, 2(-3) + 6 = 0

the change in price is $0

6 0

3 years ago

Simplify the following <br>8*7-10+55

yarga [219]

Answer:

101

Step-by-step explanation:

8*7 -10+55.

First, multiplication.

8*7 is 56.

56-10+55

56-10 is 46.

46+55 is 101.

Hope this helps plz hit the crown :D

7 0

3 years ago

The error in the length of a part (absolute value of the difference between the actual length and the target length), in mm, is

vlabodo [156]

The corrected parts of the question has been attached to this answer.

Answer:

A) Probability that the error is less than 0.2 mm; P(X < 0.2) = 0.0272

B) Mean Error (E(X)) = 0.6

C) Variance Error (V(X)) = 0.04

D) Answer properly written in attachment (Page 2)

E) P(0<X<0.8) = 0.8192

Step-by-step explanation:

The probability density function of X is;

f(x) = { 12(x^(2) −x^(3) ; 0<x<1

So, due to the integral symbol and for clarity sake, i have attached all the explanations for answers A - D.

E) The probability that the specification for the error to be between 0 to 0.8 mm is met will be;

P(0<X<0.8) = F(0.8) − F(0) =12([(0.8)^(3)] /3] −[(0.8)^(4)]/4]

= 0.8192

So, the probability is 0.8192.

3 0

3 years ago

Which set of ordered pairs below is a function?

attashe74 [19]

The answer is (9,6), (3,1), (7,3)

3 0

3 years ago