Answer:
x= 3.5
Step-by-step explanation:
2x + 3 = 10 (-3)
2x = 7 (divide by 2 )
x = 3.5
Answer:
it has one solution
Step-by-step explanation:
1.y=x-3
2. 3y-3x sub x-3 in place of y therefore
it can also be written as 3x-3x-9=9
if you add 9 to both sides 3x-3x-9+9=-9+9
0+0=0
You were wrong, the correct answer is 4
Answer:
120 students
Step-by-step explanation:
Life expectancy of dollar bill = d
life expectancy of coin = c
d = 1/20 c
substitute value in for c (30)
d = 1/20 * 30
d = 30/20
d = 1.5
life expectancy of a dollar bill = 1.5 years