MATHEMATICS HIGH SCHOOL

Is the number rational or irrational?Column A Column B
1. 3/7 A. Rational
2. 0.78( repeating) B. Irrational
3. Square root 7/9
4. 5 pi

Answers

Answer 1
Answer: 1 and 2 are both rational.
3 and 4 are both not.

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Can someone please help me with this ASAP ill love you forever

Answers

Answer:

Step-by-step explanation:

I can help :D

On the block where Liza lives, the house numbers of all the two-story homes are prime numbers. Liza's block contains house numbers between 40 and 60. List all of the house numbers of all the houses that you know have two stories.

Answers

Answer:

41, 43, 47, 53, 59

Step-by-step explanation:

Prime numbers are numbers that can be divided only by 1 and itself.i.e. it has only two factors. 1 is not a prime number as it has only one factor. The Prime numbers between 40 and 60 are 41, 43, 47, 53, 59.

The two-story home numbers are 41, 43, 47, 53, 59.

Dad is 4 times as old as his son Jim. In 10 years, Dad's age will be 20 years more than twice Jim's age. How old is Jim?If D = dad's age now and J = Jim's age now, which of the following systems could be used to solve the problem?

a. D = 4J and D + 10 = 2J + 20
b. D = 4J and D + 10 = 2(4J + 10) + 20
c. D = 4J and D + 10 = 2(J + 10) + 20

Answers

Let's focus on the "In 10 years" part

in 10 years
D will be (D + 10)
and J will be (J + 10)

"twice Jim's age" would then be 2(J + 10)
and
"20 years more than" that would be 2(J + 10) + 20

so
the answer with
D + 10 = 2(J + 10) + 20
would be your answer
that is, C.

Answer: The correct answer would be C:

Step-by-step explanation:

D=4J and D+10=2(J+10)+20

Help show ur work pls I’d give brainly and thank yous to all ur awnsers

Answers

Answer:

3 1/6

Step-by-step explanation:

Since it says HOW MANY MORE, you need to subtract.

Answer:

I don't know but maybe 3 in a half

Rewrite the fraction in simplest form.
14/30

Answers

Find the greatest common factor. That is 2. 
Divide both numbers by 2.
14 ÷ 2 = 7
30 ÷ 2 = 15

Your answer is 7/15
The answer is 7/15. The way to get that answer is to divide the numerator and the denominator by 2. Hope that helps!

Factor the algebraic expression below in terms of a single trigonometric function cos x - sin 2x - 1

Answers

cos x - sin² x - 1 = 
= cos x - ( cos² x - 1 ) - 1 =
= cos x - cos² x + 1 - 1 =
= cos x - cos² x =
= cos x · ( 1 - cos x ) 

Answer:

(cosx+2)(cosx-1)

Step-by-step explanation:

cos x - sin²x - 1

sin²x = 1- cos²x

plug in

cos x - (1- cos²x) - 1 = cos x - 1 + cos²x - 1 = cos²x + cos x - 2

factor cos²x + cos x - 2

(cosx+2)(cosx-1)
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