n Chatty Cathy’s cell phone plan she pays for minutes used plus a fixed monthly charge. For 500 minutes she pays $35 total, and for 1500 minutes used she pays $55 total. What is her monthly fixed charge?
Answers
Answer
Find out the what is her monthly fixed charge .
To prove
Let us assume that the cost per mintues = x
Let us assume that the monthly charge be = y
As given
n Chatty Cathy’s cell phone plan she pays for minutes used plus a fixed monthly charge.
For 500 minutes she pays $35 total
Than the equation becomes
500x + y = 35
As given
for 1500 minutes used she pays $55 total.
Than the equation becomes
1500x + y = 55
Subtracted 500x + y = 35 from 1500x + y = 55
1500x - 500x + y - y = 55 - 35
1000x = 20
x = $0.02
Put in the 500x + y = 35
500 × 0.02 + y = 35
10 + y = 35
y = 35 - 10
y = $25
Therefore the monthly fixed charge be $25.
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Write an equation for a parabola with x-intercepts (-2,0) and (5,0) which passes through the point (4,-12)
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Answers
Make sure the equation is in the form of [ Ax² + Bx + C = 0 ].
Yours is already in that form.
A = 1
B = 2
C = -2
Step #2:
The 'discriminant' for that equation is [ B² - 4 A C ].
That's all there is to it, but it can tell you a lot about the roots of the equation.
-- If the discriminant is zero, then the left side of the equation is a perfect square,
and both roots are equal.
-- If the discriminant is greater than zero, the the roots are real and not equal.
-- If the discriminant is less than zero, then the roots are complex numbers.
The discriminant of your equation is [ B² - 4 A C ] = 2² - 4(1)(-2) = 4 + 8 = 12
Your equation has two real, unequal roots.
Answers
SEE EXAMPLE 1
18
f(x) g(x)
0 20 22
g
х
1
35
37
s
2
50
52
3
65
67
Answers
Answer:
Step-by-step explanation:
Slope of a line passing through two points and
will be given by,
Slope 'm' =
Function 'f' passes through two points (0, 20) and (1, 35).
Slope of the line =
= 15
Similarly function 'g' is passing through (0, 22) and (1, 37).
Slope of the line = 15
Therefore,
Since, slopes of both the lines are equal, lines will be parallel.
Answers
Answer:
no
Step-by-step explanation:
The input of 13 goes to two different outputs
To be a function each input can only go to one output
This is not a function
hope this helps you
Answers
Answer:
wasdwasfasffgj7yuf
Step-by-step explanation:
Answer:is there a picture
Step-by-step explanation:
B)7.74
C)10.32
D)30.96
Answers
Hope this helps! (: