let w represent lizette's walking speed. then her running speed is w+6. the relationship between speed, time, and distance is
distance = speed × time
lizette ran for 1.5 hours, then walked for 3 hours. her total distance is
(w+6)·1.5 + w·3 = 18
4.5w + 9 = 18 . . . simplify
4.5w = 9 . . . . . subtract 9
w = 2 . . . . . . divide by 4.5
lizette's walking speed is 2 mph; her running speed is 8 mph.
step by step explanation
you went wrong on the 4th line while expanding the parentheses.
(x^2 + 2x)(x^2 + 2x) - 4
= x^4 + 2x^3 + 2x^3 + 4x^2 - 4
= x^4 + 4x^3 + 4x^2 - 4. (answer).
]answer: 3+18=21 is the fiinal answer.
$10.77 before taxes. ron went to the s...