The gift shop has a sale on Statue of Liberty snow globes. Ms. Kent is thinking about getting a snow globe for each of her students and some of her friends. The regular price of the snow globes is $6 each. Ms. Kent asks her students to write an expression for the total cost, not including sales tax, of 28 snow globes with this sale. Four students write the following expressions: Alejandro: 1 2 ( 28 ) ( 6 ) Leah: 1 2 ( 28 ) ( 6 ) + 1 2 ( 28 ) ( 1 2 ) ( 6 ) Meghan: 28 [ 6 + 1 2 ( 6 ) ] Kevin: 1 2 ( 28 ) [ 6 + 1 2 ( 6 ) ] Two students’ expressions are correct. Which two students wrote a correct expression for the total cost? Explain how you know.

I am so sorry I can't help you with this question because it is hard for me. i am super sorry.

Step-by-step explanation:

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.

jml angle lkj & angle mj = lm