6x + 2y = 18
2y = -6x + 18
y = -3x + 9
Multiply both sides:
(2x + 2)(x + 3)
= 2x^2 + 6x + 2x + 6
= 2x^2 + 8x + 6
<h2>Answer: (1) 2x^2 + 8x + 6</h2>
Answer:
87.08% percentage of families spend more than $4000 annually on food and drink
Step-by-step explanation:
Given -
average annual expenditure on food and drink for all families is $5700
Mean = 5700
standard deviation = 1500
Let X be the no of families spend annually on food and drink
percentage of families spend more than $4000 annually on food and drink =
=
= Using
= 1 -
= 1 - .1292
= .8708
= 87.08%