Answer:
x = -2,1,3
Step-by-step explanation:
Given: The curved line represented by the function crosses the x-axis at and y-axis at
To find: value of x for which
Solution:
= gives those values of x for which the curve represented by the given function cuts the x-axis.
According to question, the curve cuts the x-axis at
Answer:
3.75
Step-by-step explanation:
2.25 divided by 9
= 0.25
then
0.25 * 9
= 3.75
c(x)=9x+89
I know that you don't have the answer listed, but it is the correct answer.
Let numbers of books be 'b' and numbers of CDs be 'c'
We can set up two equations:
Equation [1] ⇒
Equation [2] ⇒
We are solving for the number of books and the number of CDs bought
When we have two equations in terms of two different variables;
and
, that we need to solve, then this becomes a simultaneous equation problem.
First, rearrange Equation [1] to make either
or
the subject:
Then we substitute
into Equation [2]
Now we know the value of
which is
, substitute this value into
we have
Answer:
Numbers of books = 13
Numbers of CDs = 7
