Answer:
A
Step-by-step explanation:
We can calculate the equation of the lines based on two points. First line m:
y = ax +b
where a is the slope and b is the y-intercept. To find the slope we use the x and y of the points as:
a =
So:
y = 6x + b
we can find the y intercept by substituting the x and y for one of the points:
solving for b:
b=-32-(6)(-4)= -8.
So the equation is:
y = 6x - 8.
We can change it to:
y + 8 = 6x
8 = 6x - y.
So it’s (A).
Hope that helps!
Answer:
Sarah bought 7 coach tickets and 4 first class tickets.
Step-by-step explanation:
From the information provided, you can write the following equations:
x+y=11 (1)
240x+1100y=6080 (2), where:
x is the number of coach tickets
y is the number of first class tickets
In order to find the value of x and y, first you have to solve for x in (1):
x=11-y (3)
Now, you have to replace (3) in (2) and solve for y:
240(11-y)+1100y=6080
2640-240y+1100y=6080
860y=6080-2640
860y=3440
y=3440/860
y=4
Finally, you can replace the value of y in (3) to find the value of x:
x=11-y
x=11-4
x=7
According to this, the answer is that Sarah bought 7 coach tickets and 4 first class tickets.
Same here :) !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
A. populations of boys and girls at three different schools
B. number of records versus compact discs sold each week during a one month period at music den
C. the weekly interest rate for mortgages at a bank for the past year
D. numbers of hot and cold lunches sold each day in the school cafeteria during the first week of school
the weekly interest rate for mortgages at a bank for the past year
Answer: Option C.
<u>Explanation:</u>
Double bar graph is a bar graph that has two bars in it. On one bar, there is one set of data and on the other bar is the other set of the data on the graph.
In the options given above, the interest rate that has been charged on a weekly basis for the mortgages by a bank is an information that only provides one set of data and does not provide two sets of data.
Answer:
V = 15.7*x^2 + 125.6*x + 251.2 I'd use this as an answer, but it depends how you have been told to treat pi. This answer is also possible.
V = 5*pi*x^2 + 40*pi*x + 80*pi
I can't really tell you which one to use.
Step-by-step explanation:
Givens
V=pi*r^2 * h
pi = 3.14
r = (x + 4)
h = 5
Solution
V = pi * (x + 4)^2 * 5
V = pi * (x^2 + 8x + 16)*5
V = pi * (5x^2 + 40x + 80) Now the question is what to do with pi.
V = 5*pi*x^2 + 40*pi*x + 80*pi
That one possible answer. The other is to give pi a value
V = 15.7*x^2 + 125.6*x + 251.2