Answer:
Collect pairs of data where a relationship is suspected.
Draw a graph with the independent variable on the horizontal axis and the dependent variable on the vertical axis. ...
Look at the pattern of points to see if a relationship is obvious. ...
Divide points on the graph into four quadrants.
Step-by-step explanation:
Difference of 2 perfect squres
if yo have
a^2-b^2 that equals (a-b)(a+b)
x^2-1^2=(x-1)(x+1)
tada
We can set this problem up as an algebraic equation, which we can then solve to find our answer.
We start at -3. So we can start our equation with that:
However, this doesn't represent any change in temperature, just that we start at -3. To show change, we will use the variable , where stands for the number of hours. Each hour accounts for a change of -2.5 in degrees, meaning that we must multiply our by -2.5. We can now add this term into our equation:
We are trying to find when we will reach -18 degrees, so we will set our entire equation equal to -18 and solve:
It will take us 6 hours, or choice A.
Answer:
1. $46
2. C= 25+ 3r
Step-by-step explanation:
In this problem, we are going to model an equation for the cost of Ryans rides in the park
the $25 is a constant fee
while the $3 is a fee that depends on the number of rides
let the cost be C
and let the number of rides be r
How much would he have to pay if he goes on r rides?
C= 25+ 3r
How much money would Ryan have to pay in total if he goes on 7 rides?
C= 25+3(7)
C= 25+21
C= $46
X² - 81 = 0
x² = 81
x = √81
x = <span>9</span>