**Answer:**

One

**Step-by-step explanation:**

It is given that,

y = 3x-5 ....(1)

y = -x+4 .....(2)

We can solve the above equations using substitution method. Put the value of y from equation (1) to equation (2) such that,

Put the value of x in equation (1) we get :

It means that the value of x is and the value of y is . Hence, the given equations has only one solution.

**Answer:**

x=20

**Step-by-step explanation:**

Let = a 30 day period

The first equation is 50 - 2x (because you start with $50 and subtract 2 for each 30 day period)

The second equation is 40-1.5x

Set them equal to each other: 50 - 2x = 40 - 1.5x

Solve for x:

50 - 2x = 40 - 1.5 x

+2x +2x

-----------------------

50 = 40 + 0.5 x

-40 -40

-------------------

10 = 0.5 x

20 = x

So there will be 20 30-day periods until the cards will be equal in value.

Check: After 20 periods, 50 - 2(20) = $10 left

40 - 1.5(20) = also $10 left

Just search this up on the internet

You're answer is the third one, you gotta divide the money by the hours worked and then compare.

**Answer:**

90 words

**Step-by-step explanation:**

Based on the information we have already, we can assume Alan types the same amount of words per minute meaning, all we have to do here is multiply.

**30 words per minute x 3 minutes = 90 words **