For number 4 you do x + 19 = 90
90 - 19 = 71 so x = 71
Answer: 20x-6 = 34
Step-by-step explanation:
Given: The length of rectangle is represented by 8x - 3.
The width of the rectangle is represented by 2x.
The perimeter is 34 inches.
Perimeter of rectangle = 2 (length + width)
Perimeter of rectangle = 2 (8x-3+2x)
Perimeter of rectangle = 2 (10x-3)
Perimeter of rectangle = 20x-6
Thus , the required equation that represent the perimeter: 20x-6 = 34
Answer: 
Step-by-step explanation:
Since you did not attach the diagram and I don't know the dimensions of the collage, I will give you a general explanation of the procedure you need to use in order to solve the exercise:
1. You need to use the formula for calculate the area of a rectangle:

Where "l" is the length and "w" is the width.
2. Using the formula, you must calculate the area of an small picture.
You know that its length is 4.5 inches and its width is 3.5 inches. Therefore, its area is:

3. Calculate the area of the collage using the formula:

4. Finally, divide the area of the collage by the area of an small picture in order to find the number of small pictures that will fit within the collage:

What is 7 fewer than a number s?
Answer: s - 7
Hope that helps...
The 1st one is 8 because a coin has 2 sides and you have 4 colors whats 2*4=?