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-BARSIC- [3]
3 years ago
13

13. A cube has a surface area of 150 ft. Determine the edge length of the cube as a mixed radical in lowest form and

Mathematics
1 answer:
Elena-2011 [213]3 years ago
5 0

Answer:5ft

Step-by-step explanation:

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Please explain how you came to your answer, need help ASAP. Will give brainliest
shusha [124]
The vertex is the high point of the curve, (2, 1). The vertex form of the equation for a parabola is
.. y = a*(x -h)^2 +k . . . . . . . for vertex = (h, k)

Using the vertex coordinates we read from the graph, the equation is
.. y = a*(x -2)^2 +1

We need to find the value of "a". We can do that by using any (x, y) value that we know (other than the vertex), for example (1, 0).
.. 0 = a*(1 -2)^2 +1
.. 0 = a*1 +1
.. -1 = a

Now we know the equation is
.. y = -(x -2)^2 +1

_____
If we like, we can expand it to
.. y = -(x^2 -4x +4) +1
.. y = -x^2 +4x -3

=========
An alternative approach would be to make use of the zeros. You can read the x-intercepts from the graph as x=1 and x=3. Then you can write the equation as
.. y = a*(x -1)*(x -3)
Once again, you need to find the value of "a" using some other point on the graph. The vertex (x, y) = (2, 1) is one such point. Subsituting those values, we get
.. 1 = a*(2 -1)*(2 -3) = a*1*-1 = -a
.. -1 = a
Then the equation of the graph can be written as
.. y = -(x -1)(x -3)
In expanded form, this is
.. y = -(x^2 -4x +3)
.. y = -x^2 +4x -3 . . . . . . same as above
5 0
3 years ago
Which of these is the algebraic expression for "3 times the sum of 2 and y?"
11111nata11111 [884]
3(2 + y) <== ur expression
8 0
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Answer:

Step-by-step explanation:

Any fraction where the numerator is bigger than the denominator is a fraction greater than 1. EX. 3/2

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3 years ago
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son4ous [18]

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this is the correct graph

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2 years ago
What is the radical form of the expression 234 ?
Agata [3.3K]
A is the answer!! !
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