Answer:
m = -4
Step-by-step explanation:
We are given that a line intersects the points (-2, 9) and (3, -11).
We want to write the slope of this line.
The slope (m) can be found using the formula 
, where 
and 
are points.
Even though we have everything we need to calculate the slope, let's label the values of the points to avoid any confusion & mistakes.
Now substitute these values into the formula (remember that the formula has subtraction).
m=
m=
Simplify.
m=
Subtract the values on top.
m=
Now add the values on the bottom together.
m=
Now divide -20 by 5.
<u>m = -4</u>
First, ensure that both sides are single fractions:
By cross multiply, we mean:
1. multiplying the numerator of the left hand side with the denominator of the right hand side.
2.multiplying the numerator of the right hand side with the denominator of the left hand side.
That is ..
a x d = c x b
Answer:
A. T = 20°C - (2.8°C/h × 4h)
Step-by-step explanation:
The rate of change of temperature (-2.8°C/h) is multiplied by time (4h) to get the change in temperature (-11.2°C). That change is added to the initial temperature (20°C) to find the temperature after 4 hours.
Only equation A properly expresses this calculation.
In choice B, the rate of change is (wrongly) shown as +2.8°C/h. In the other choices, the combinations of units are nonsense. (What is a °C·h?)
0.4×29.95
=11.98 so your answer is 11 dollars and 98 cents
Length of Triangle= 2(W) +2
i dont know if im right or not.
