Louis and Tony are building houses out of blocks. Louis has 30 blocks, and gives Tony 13 blocks to build with. Which equation can be used to determine the number of blocks Louis has left to build his house with?
1.
30 - 13 = x
2.
1330 = x
3.
30-X = 13
4.
X - 13 = 30
pls help

1

Step-by-step explanation:

Since he has 30 blocks to begin with he gives 13 of them away. 30-13 is x which is your answer of 17.

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.