Answer:

Step-by-step explanation:
Given
See attachment for graph
Required
The unit cost
Pick any point on the dots of the graph; we have:

The unit cost is then calculated as:


Answer:
7 out of 16
Step-by-step explanation:
Well there are 16 marbles in total, and only 7 silver marbles. So the probability of getting a silver marble is 7/16
Answer:
8
Step-by-step explanation:
Total meaning addition, you would use the opposite operation to find the answer.
28 - 20 = 8
And to check your work you would add;
20 + 8 = 28
which is the brothers total combined age.
Answer:
For only the rectangle (that I've coloured in with red) I assume it would be 9 inches squared. However, when adding on the triangles on the side, it would be 9+3+3 = 15
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
2 x 4 = 8
2 x 3 = 6