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3 years ago

The length of hair must be great than 10 inches in order for it to be donated . Use / for the length of the hair .

Mathematics

1 answer:

Nitella [24]3 years ago

7 0

I'm pretty sure the answer is / > 10

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Show that cos2x=cosx

PSYCHO15rus [73]

cos (2x) = cos x

2 cos^2 x -1 = cos x using the double angle formula

2 cos ^2 x -cos x -1 =0

factor

(2 cos x+1) ( cos x -1) = 0

using the zero product property

2 cos x+1 =0 cos x -1 =0

2 cos x = -1 cos x =1

cos x = -1/2 cos x=1

taking the arccos of each side

arccos cos x = arccos (-1/2) arccos cos x = arccos 1

x = 120 degrees x=-120 degrees x=0

remember you get 2 values ( 2nd and 3rd quadrant)

these are the principal values

now we need to add 360

x = 120+ 360n x=-120+ 360n x = 0 + 360n where n is an integer

3 0

4 years ago

Wyatt is enlarging a rectangular drawing using a scale factor of 2.5.<br> 7.4 in<br> 5 in

omeli [17]

It is 2.4 x 2.5 which equals 6 the answer is 6

3 0

3 years ago

A bag contains 20 slips of paper Individually numbered. If a slip of paper and a letter in the word PENNSYLVANIA is chosen at ra

Soloha48 [4]

Answer:

$P(M4\ n\ V) = 2.083\%$

Step-by-step explanation:

Given

Paper = 20 slips

Word: PENNSYLVANIA

Required

Determine P(Multiple of 4 and V)

The sample size of the 20 slips is:

$n(S) = 20$

The outcomes of multiples of 4 is:

$M4= \{4,8,12,16,20\}$

$n(M4) = 5$

So, the probability of multiples of 4 is:

$Pr(M4) = \frac{5}{20}$

$Pr(M4) = \frac{1}{4}$

The sample size of PENNSYLVANIA is:

$n(S) = 12$

The outcome of V is:

$n(V) = 1$

So, the probability of V is:

$P(V) = \frac{1}{12}$

So, the required probability is: P(Multiple of 4 and V)

$P(M4\ n\ V) = P(M4) * P(V)$

$P(M4\ n\ V) = \frac{1}{4} * \frac{1}{12}$

$P(M4\ n\ V) = \frac{1}{48}$

$P(M4\ n\ V) = 0.02083$

Express as percentage

$P(M4\ n\ V) = 0.02083 * 100\%$

$P(M4\ n\ V) = 2.083\%$

4 0

3 years ago

If ∠1 = 3x, ∠2 = 5x + 18, and s ⊥ r, find m∠1.

Bingel [31]

I hope it will help you.

7 0

3 years ago

Read 2 more answers

123556 cube root pls

Korvikt [17]

Answer: ❄︎ ✭ ❄︎

The cube root of 123556 is: ✩ ✶ ✲

49.807.... ★ ✮

It is irrational, which means it goes on forever. ✧ ☆

Step-by-step explanation: ✺ ✹

$*VirtuosoTeen*$ ✰ ✴︎

✴︎ ❃ ✴︎ ❈ ✴︎ ✩ ✦ ✣

4 0

3 years ago