Walt is 3 years older than Ralph Ralph is 4 years older than Henry. If Walt is 48, how old is Henry?
Walt = 48
Ralph =
Henry =

Walt = 48  years

Ralph =  45 years

Henry = 41 years

Step-by-step explanation:

We know that Walt is 3 years older than Ralph so we can write,

Walt = 3 + Ralph        eq. 1

We also know that Ralph is 4 years older than Henry so we can write,

Ralph = 4 + Henry      eq. 2

It is given that Walt's age is 48 years so substitute it into eq. 1

Walt = 3 + Ralph

48 = 3 + Ralph

Ralph = 48 - 3

Ralph = 45 years

Now substitute the age of Ralph into eq. 2

Ralph = 4 + Henry

45 = 4 + Henry

Henry = 45 - 4

Henry = 41 years

Therefore,

Walt = 48  years

Ralph =  45 years

Henry = 41 years

Verification:

Walt = 3 + Ralph        eq. 1

48 = 3 + 45  

48 = 48 satisfied

Ralph = 4 + Henry      eq. 2

45 = 4 + 41

45 = 45 satisfied

the range of a function is the range of y-values for which it is defined, or exists. given that we are only looking at the y-values, we can already discount the first two answers as they deal with the domain of the function (range of x-values).

now, what we need to do is find the smallest and highest y-values for which the function is defined. if you'd like, you could take a ruler and start at the very bottom of the graph, find the lowest point, then move the ruler higher and higher until you reach the highest point. doing so either in your head or with an actual ruler, we can see that the lowest y-value is -5 and the highest y-value is -1.

the question now remains as to whether they are included in the range (fourth answer) or excluded (third answer). the key here is to recognise whether they are marked with an open or a closed circle. since both (-2, -5) and (2, -1) are marked with a closed circle, they are points that exist on the graph and are thus included in the range (note that if they were marked with an open circle like (4, -2) then that would signify that there is a break in the graph at that point).

thus, the fourth answer, (y | -5 ≤ y ≤ -1), is correct.

also note that usually it is good practice to scan your eye inbetween the highest and lowest point for any breaks in the graph - we do have one here at (4, -2), however -2 is still included in the range because there is another point that is included in the graph with the same y-value, ie. point (1, -2).

i hope that but if you require any further explanation don't hesitate to comment below.

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )