Answer:
lauren is incorrect
Step-by-step explanation:
3x+4(2x+5)
6x+5x+5
simplify the expressions
3x+4*2x+4*5=3x+8x+20=11x+20
6x+5x+5=11x+5
11x+20 does not equal 11x+5 so lauren is incorrect
hope this helps
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2.5y + 3x=7 (1st)
5x - 2.5y = 5 re-write -2.5y + 5x = 5 (2nd)
2.5y + 3x=7 (1st)
-2.5y + 5x = 5 (2nd)
---------------------------add
8x = 12
x = 12/8 = 1.5
2.5y + 3x=7
2.5y + 3(1.5)=7
2.5y = 7 - 4.5
2.5y = 2.5
y = 1
answer
solution (1.5 , 1)