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3 years ago

I need honest help with this please

Mathematics

1 answer:

Musya8 [376]3 years ago

8 0

Answer:

A) $cos\theta=\frac{3}{5}$

Step-by-step explanation:

$cos\theta=\frac{adjacent}{hypotenuse}$

$cos\theta=\frac{a}{c}$

$cos\theta=\frac{6}{10}$

$cos\theta=\frac{3}{5}$

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Evaluate (2 - 5i)(p + q)i when p = 2 and q = 5i a. 29i b. 291-20 C.-21i d.29

attashe74 [19]

Answer:

A. 29i

Step-by-step explanation:

Step 1: Plug in given variables

(2 - 5i)(2 + 5i)i

Step 2: Difference of squares (expand)

(4 - 25i²)i

Step 3: Imaginary numbers rules

(4 - 25(-1))i

Step 4: Combine like terms

(4 + 25)i

(29)i

Your final answer will be 29i

8 0

3 years ago

Read 2 more answers

Solve the following. 2x^2-7x-4/6x^2+7x+2<0 Can someone explain how to solve this.

oksano4ka [1.4K]

Answer:

Which one have same variable gather or decrease up

Step-by-step explanation:

2x^2-4.6x^2=1.4x^2

-7x+7x=0

1.4x^2+2<0

x<0

4 0

3 years ago

What is the variable for 49n+986=-43?

tankabanditka [31]

Answer:

according to another user on Brainly the variable is n=-21

Step-by-step explanation:

subtract 986 from both sides first.why? Because that is that is going to isolate the variable.

hope this helps! :)

4 0

2 years ago

The grade appeal process at a university requires that a jury be structured by selecting six individuals randomly from a pool of

romanna [79]

Answer: a) $\dfrac{3}{874}$

b) $\dfrac{30}{3059}$

c) $\dfrac{3575}{12236}$

Step-by-step explanation:

Given : Number of students : 11

Number of faculty members : 13

Total persons : $11+13=24$

Total number of ways to structure a jury of six people from a group of 24 people :-

$^{24}C_{6}=\dfrac{24!}{6!(24-6)!}=134596$

a) Number of ways of selecting a jury of all students :-

$^{11}C_{6}=\dfrac{11!}{6!(11-6)!}=462$

Then , the probability of selecting a jury of all students :-

$\dfrac{462}{134596}=\dfrac{3}{874}$

b) Number of ways of selecting a jury of all faculty :-

$^{13}C_{6}=\dfrac{13!}{6!(13-6)!}=462$

Then , the probability of selecting a jury of all students :-

$\dfrac{1716}{134596}=\dfrac{30}{3059}$

c) Number of ways of selecting a jury of two students and four faculty :-

$^{11}C_{2}\times^{13}C_{4}=\dfrac{11!}{2!(11-2)!}\times\dfrac{13!}{4!(13-4)!}=39325$

Then , the probability of selecting a jury of all students :-

$\dfrac{39325}{134596}=\dfrac{3575}{12236}$

3 0

3 years ago

Out of 32 students in a class, 5 said they ride their bikes to school. based on these results,how many of 800 students in the sc

Colt1911 [192]

Do a proportion.
5/32= x/800
Cross multiply and divide
800 x 5= 4,000
4,000 divided by 32= 125
So answer is 125 students

6 0

3 years ago