3 years ago

X

Mathematics

1 answer:

Serjik [45]3 years ago

4 0

Answer:

Step-by-step explanation:the first one is 8

Second 3 3- 6

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See the file below to see my question :)

RideAnS [48]

9514 1404 393

Answer:

a = 3
b = -18

Step-by-step explanation:

Using the least common denominator, we have ...

$2-\dfrac{x+1}{x-2}-\dfrac{x-4}{x+2}\\\\=\dfrac{2(x-2)(x+2)-(x+1)(x+2)-(x-4)(x-2)}{(x-2)(x+2)}\\\\=\dfrac{2(x^2-4)-(x^2+3x+2)-(x^2-6x+8)}{x^2-4}\\\\=\dfrac{(2-1-1)x^2+(-3+6)x+(-8-2-8)}{x^2-4}=\boxed{\dfrac{3x-18}{x^2-4}}$

The values of a and b are ...

a = 3

b = -18

3 0

3 years ago

What is the inverse of the following condition? If n is the sum of two even numbers, then n is even.

GaryK [48]

So I am pretty sure that inverse means reason.
example:
2+4=6
Basically, any two even numbers together make an even number

8 0

4 years ago

The four swimmers listed in the table are trying out for the swim team. Two will make the team. How many different combinations

ratelena [41]

Number of possible combinations = (4x3) ÷ 2 = 6

Answer: There are 6 possible combinations.

8 0

3 years ago

Zahra completed a 5-kilometer race in 40 minutes. If she were able to keep the same pace, how many kilometers could she run in 7

Valentin [98]

Answer:

Step-by-step explanation:

you can set up a proportion for it (i included a picture of it)

3 0

3 years ago

Read 2 more answers

I have 30 coins consisting of nickels, and quarters. The total value of the coins is $4.10. How many of each kind do I have?

Vedmedyk [2.9K]

A=#nickels, b=#quarters

5a + 25b = 410 total value

5(a + 5b) = 410

a + 5b = 82

a + b = 30 total no. of coins

subtracting . . . 4b = 52

thus b = 13 and a = 17

13 quarters and 17 nickels = 13*25 + 17*5 = 410 = $4.10

5 0

4 years ago