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Mathematics

1 answer:

DiKsa [7]2 years ago

8 0

9-7= 2 and ±2-±8=6 here are the answers to one of the questions you need help whith

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given a and b are numbers,and a+b =180,which statement also must be true ? a=180-b , a-180=b , 360=2a+2b, a=90 and B=90

Yuri [45]

A=180-b is same as a+b=180

because you just subtract b from both sides

3 0

2 years ago

How do find you equivelant expressions?

Svetlanka [38]

You'll have to start off by finding the variables. Ex:

3(x + 3) - 2(x + 3)

As you can see here, the two similar variables are x. By using the distributive property, you will get this:

3x + 9 - 2x + 6

Next, you'll want to subtract the two variables, since 2x has a - in front of it:

1x + 9 + 6

or

x + 9 + 6

Then, you want to add the two numbers without the variable:

x + 15

Your answer is x + 15.
Hopefully that helped! :)

4 0

2 years ago

A box of old books contains 6 mysteries, 4 biographies, and 2 children’s books. Which of the following can be used to determine

MAVERICK [17]

<h2>Answer:</h2><h2>The probability of choosing a mystery book from the box, replacing it, and then choosing a biography = $\frac{1}{6}$ </h2>

Step-by-step explanation:

A box of old books contains mysteries, biographies, and children’s books.

The number of books in mysteries = 6

The number of books in biographies = 4

The number of books in childrens = 2

The total number of books = 12

The probability of choosing a mystery book from the box = $\frac{6}{12}$

The probability of choosing a biography book from the box = $\frac{4}{12}$

The probability of choosing a mystery book from the box, replacing it, and then choosing a biography = ( $\frac{6}{12}$ ) ( $\frac{4}{12}$ ) ( since it is with replacement)

= $\frac{1}{6}$

8 0

3 years ago

Factor<br> 2z to the second power +3z-9

kozerog [31]

The answer is (2z-3)(z+3)

5 0

3 years ago

The average of 8 people in a golf club is 44. A ninth person joins the club and the new average of the golf club is 47. What is

PSYCHO15rus [73]

Answer:

41 year old

Step-by-step explanation:

Suppose x is the total age before the ninth person joins. x/8=44 then the new persons age is a then x+a/9=47 so you subsitute x=352 then (352+a)/9=47 then 352+a=393 so we find a=41

5 0

2 years ago