Find the coordinate of the vertex of the following parabola algebraically. y=2x^2-28x+80
Answers
Answer:
vertex = (7, - 18)
Step-by-step explanation:
given a parabola in standard form : ax² + bx + c : a ≠ 0
Then the x- coordinate of the vertex is
= -
y = 2x² - 28x + 80 is in standard form
with a = 2, b = -28 and c = 80, hence
= -
= 7
substitute x = 7 into the equation for corresponding value of y
y = 2(7)² - 28(7) + 80 = 98 - 196 + 80 = - 18
vertex = (7, - 18)
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Subtract how much she has saved already from the total cost:
253.77 - 136.27 = 117.50
She needs $117.50 more.
Now divide that by the savings per week to find the number of weeks:
117.50 / 23.50 = 5 weeks.
Answer:
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Step-by-step explanation:
hope it helps
Answers
The average temperature change per hour is -3 degrees C
Answers
Answers
8.5 x 3.14 = 26.69
(round answer)
c = 3.14(8.5)
and it would equal: 26.69
Answers
the 0 has no value and cannot add anything on top of the -4
So -4 stays the same:)
Answer = -4
Good Luck! :)
Consist of the set of numbers: {…-4, -3, -2, -1, 0, 1, 2, 3, 4…}
If a number has no sign it usually means that it is a positive number.
Example {0,1,2,3,4,5,6.....}
Adding and Subtracting integers
Adding integers
(+)+(+) = + sum
(-)+(-) = - sum
(+)+(-) or (-)+(+) = difference of numbers with signs of larger number in absolute value.
Subtracting Integers
(-)(-) = + sum
(-)(+) = - sum
Since 0 is a positive number and -4 is a negative number, we can represent them as (-)(+) = - sum
0+(-4) Equation
0-4 Simplify
-4 = Solution
By today thank you
Answers
8) not equal, not equal, equal
9) 1/8 of a pound is in each portion
10) $3.75
I hope this helps you. With number 8, all i did was simplify the fractions and see if the can be equal to the first fraction in the whole question and determined my answer by that. For number 9, i divided 1/2 of a pound by 2 and got 1/4 of a pound, and then divided that by 2, and i got the answer of 1/8 of a pound. When it come to number 10, i multiplied $0.50 by 7 and got $3.50, and since the last part was half a foot i knew it would cost $0.25 instead of $0.50, so i just added that to the answer and got the end result of $3.75.