Answer:
12 oz: $0.35 per oz
16.3 oz: $0.38 per oz
28 oz: $0.30 per oz
64 oz: $0.33 per oz
Which size is the best deal?
28 oz
Step-by-step explanation: it gave me the right answer after.
(5x+1)² = 7; expand: 25x² + 10x +1 = 7 or 25x² + 10x -6 = 0
Solve this quadratic for x:
x = [-b + √(b² - 4ac)]/2a and x = [-b - √(b² - 4ac)]/2a
Plug the values and you'll find :
x = (- √7 - 1)/5 (answer C)
x = (+√7 -1)/5 (answer E)
Y=1/2x -3 find the x coordinate of the point whose y
coordinate is 5
y = 5. Write the equation as:
1/2F2x - 3 = 5
multiply both sides by 2, and you have
x - 6 = 10
x = 10 + 6
x - 16
Check solution in original equation, replace x with 16
y = 1/2F2(16) - 3
y = 8 - 3
y = 5
Answer:
7.79 to the nearest hundredth
Step-by-step explanation: