Question

1. is -7 + 9 = - 9 + 7 true , false , or open ? ( 1point )

A . true

b. false

c. open


2. is 4x-3=19 true , false , or open ? ( 1point )

A. true

b. false

c. open

Answer 1

1.

7 + 9 = - 9 + 7

Add the first side:

16 = -9 + 7

Add the second side:

16 = -2

16 does NOT equal -2, so it is incorrect.

Answer 2

4x - 3 = 19

Ad 3 to both sides:

4x = 22

Divide 4 to both sides:

x = 5.5

So the answer is Open, because there can be other values of x, like other fractions.

Answer 3

Welcome to Open Study!

You can give medals by clicking 'Best Response'. @diomondsandmakeuo

Answer 4

so is 1 . false

Answer 5

@iGreen

Answer 6

Yes, 1 is false, and 2 is open.

Answer 7

@diomondsandmakeuo