What is the value of x in the equation x – y = 30, when y = 15? 4 8 80 200

There are many ways of solving the set of equations x + y = 30 and  x - y = 2 for x and y.

From x +y = 30 we get x = 30 - y

Now substitute this in the equation x - y = 2

30 - y - y = 2

-2y = -28

y = 14

As x = 30 - y = 30 - 14 = 16

The required solution of the set of equations is x = 16 and y = 14

Toodles~

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

step-by-step explanation:

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