17X-7Y. You add or subtract the same variables, in this case you only have two x's and one y. So you add them, because you have a addition sign. 13x+4x and you leave the Y alone, because there is not another Y variable.
If you would like to find the percent markup, you can calculate this using the following steps:
x% of $20 is $29
x% * 20 = 29
x/100 * 20 = 29
x = 29 * 100 / 20
x = 145%
145% - 100% = 45%
The correct result would be 45%.
Answer:
26 1-foot squares of silver paper.
Step-by-step explanation:
The dimensions of the bulletin board are 6.5 feet by 4 feet.
To determine how many squares of silver paper she needs to but, we first determine the area of the bulletin board.
Area of the board =6.5 X 4= 26 Square feet
Therefore, Mrs Golden needs to buy <u>26 1-foot squares of silver paper.</u>
There will be <u>no pieces left over</u> as there is no decimal or fractional value in the area of the bulletin board.
Answer:

Step-by-step explanation:

For a, the answer is 2. for b, the answer is 12