Which equation can be used to find the value for X?

(3x-5) + 2x = 90

Step-by-step explanation:

We know that there are 180 degrees in a triangle. We also know that one angle is 90 degrees.

This means that (3x-5) + 2x = 90.

Answers with working:

1.

Cost of a crate of floor tiles = $95.94

The crate has 6 boxes of floor tiles. This means 6 boxes of tiles cost $95.94

Now each box has 20 floor tiles.

So, total tiles in a box are : tiles

Now, cost of 6 boxes = $95.94

So, cost of 1 box (b) = = $15.99

20 tiles cost $15.99

Hence, 1 tile (t) will cost = = $0.799 ≈ $0.80

2.

Brand A contains 8 fluid ounces and  costs $1.28.

Cost of per fluid ounce = = $0.16

Brand B contains 12 fluid ounces and costs $1.68.

Cost of per ounce = = $0.14

Difference between both the per ounce costs = = $0.02