Answer:625
Step-by-step explanation:21/(3+4)x9-2=25 and 25^2 (squared) is 625
Answer:
4x^3+4x^2+4x+8
Step-by-step explanation: find (g+f)(4)
g(x)=3x+2
f(x)=x^3+x^2-2x
______________________
(4)*(3x+2+x^3+x^2-2x)
(4)(x^3+x^2+x+2)
4x^3+4x^2+4x+8
Answer:

Paul will catch Fred after
at a distance
.
Step-by-step explanation:
Distance is represented by
and the time is represented by
. Here after
hours(when Fred started) the distance covered by Fred and Paul is same that is
.
For Fred:
time=
distance=
Speed

Paul:
Since Fred started 30 minutes earlier, so Paul's travel time will be 30 minutes less than that of Fred.
Time
Speed
Distance

Hence system of equation

Solution of this system of equations gives the time, when Paul will catch Fred and distance covered by each of them.

Time taken by Paul
Hence Paul will catch Fred after
at a distance
.
Answer:
#6
Domain = {6, 8, 9, 11}
This represents the ages of the students surveyed.
Range = {0, 1, 2, 3}
The range is the possible number of pets that the students may have.
This is not a function because in functions, each x-value can only have one y-value. The x-value, age 11, has two possible y-values, number of pets.
#7
Domain = {1, 2, 3, 4, 5}
This represents the time passed in hours that the distance was measured
Range = {50, 100, 150, 200}
This represents the possible distances in miles that were measured.
This is a function. Each x-value only have one y-value. Each hour only has one possible distance.
Explanation:
The domain is used to state all of the possible x-values in a set of data.
The range is used to state all of the possible y-values in a set of data.
The x-values may also be called independent variables, and the y-values may be called dependent variables. The y-values change depending on what "x" is.
A set of data is a function when each and every x-value only has one y-value.
It is still a function if y-values have more than one x-value. (On a graph, it look like a horizontal line, like in question 7).