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Question 303891: 
where:
-1 ≤ x ≤ 2
Find the minimum, maximum, and range.
What I've tried:
We already know y = k

so:
y = k = 3
Next find the value for x:

Plug in the variables from the equation:
To solve, use:
x= -b/2a
so:
x= -0/2(1)
x=0
Vertex of a graph:
(x,y)
(0,3)
To find the minimum and maximum, take the original equation and calculate using the 3 different variables for x we now have. (-1, 0, and 2; since -1 ≤ x ≤ 2)

= 1 + 3
= 4

= 0 + 3
= 3

= 4 + 3
= 7
Minimum: 3
Maximum: 7
Range: [3,7] = 4
It's what I tried, but apparantly it's wrong. Can anyone help me see where I messed up? Thanks!!!
Click here to see answer by scott8148(6628)  |
Question 304083: Sandra wants to place a utilitarian door on the back entrance that leads to her patio. The solid plastic laminate door will be shaped like a rectangular solid and will measure 72 3/4 inches long and 32 2/3 inches wide; and will be 1 3/8 inch thick. How many cubic inches of plastic laminate material will be needed for the door? Give solution exactly as a mixed number. Include correct units with your answer.
Click here to see answer by mananth(16946)  |
Question 304083: Sandra wants to place a utilitarian door on the back entrance that leads to her patio. The solid plastic laminate door will be shaped like a rectangular solid and will measure 72 3/4 inches long and 32 2/3 inches wide; and will be 1 3/8 inch thick. How many cubic inches of plastic laminate material will be needed for the door? Give solution exactly as a mixed number. Include correct units with your answer.
Click here to see answer by Alan3354(69443)  |
Question 304590: Suppose you are older than your brother, and at most, half your Father's age. Let x be your age, b your brother's, and f your father's. Write a compound inequality that describes the relationship of your age to that of your brother's and your father's.
Click here to see answer by blwinbbbles(106)  |
Question 304917: Mathematicians have been searching for a formula that yields prime numbers. One such formula was x2-x+41. Select some numbers for x, substitute them in the formula, and see if prime numbers occur. Try to find a number for x that when substituted in the formula yields a composite number. What number will solve for x?
Click here to see answer by themathtutor2009(81) |
Question 305389: Solve the problem. When Mary's car's tire pressure is 30 pounds per square inch (psi), it averages 20.8 mpg of gasoline. If the tire pressure is increased to 35 psi, the car averages 21.6 mpg of gasoline. If Mary drives an average of 20,000 miles per year, how many gallons of gasoline will she save in one year by increasing her tire pressure from 30 psi to 35 psi (round to the nearest unit)? Show your step by step work!
Click here to see answer by josmiceli(19441)  |
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