Domain is the x value. So you would just plug in every value in the domain set into the f(x) function.
5 (-2) + 4 =
-6
5 (3) + 4 =
19
5 (5) + 4 =
29
Your answer is B.
Using substitution:In the first equation, look to solve for x
{x + 3 y = 8
{4 x - y = 6
Subtract 3 y from both sides:
{x = 8 - 3 y
{4 x - y = 6
Substitute x = 8 - 3 y into the second equation:
{x = 8 - 3 y
{4 (8 - 3 y) - y = 6
4 (8 - 3 y) - y = (32 - 12 y) - y = 32 - 13 y:
{x = 8 - 3 y
{32 - 13 y = 6
In the second equation, look to solve for y:
{x = 8 - 3 y
{32 - 13 y = 6
Subtract 32 from both sides:
{x = 8 - 3 y
{-13 y = -26
Divide both sides by -13:
{x = 8 - 3 y
{y = 2
Substitute y = 2 into the first equation:
Answer: {x = 2
{y = 2
14/3
or 4 and 2/3
idk what else to say so don’t mind this
Answer:
So then the correct answer is B. $200.
Step-by-step explanation:
Notation
Let X be the average contribution size before John makes his contribution.
Let Y be the total contribution size before John makes his contribution.
Let Z be John's contribution.
We know that for this case $ 75 represent the original average amount before the contribution with 50% increase so we can set up the following equation in order to find the original average amount
And solvong for X we got:
Now we can find the total contribution before the donation with the following proportion:
And then with the formula of average taking in count the 6 values we can find the size of donation Z like this:
So then the correct answer is B. $200.
Answer:
Step-by-step explanation:
Find the infinite geometric sum of -144 +24 - 4 + ...
The sum of infinite geometric sequence is
where is the first term and is the common ratio.
In your case,
So, the sum is