1 cake cost =2.50 divide by 5 = 0.50p
7 cakes cost = 50p times 7 = £3.50
answer = £3.50
I would solve this using tangents. Let h be height of flagpole.
Set up 2 right triangles, each with a base of 40.
The larger triangle has height of "h+70"
Smaller triangle has height of 70.
Now write the tangent ratios:

Note: A-B = 9
To solve for h we need to use the "Difference Angle" formula for Tangent

Plug in what we know:



Given:
13 pounds and 7 ounces
convert to kilograms:
1 kilogram = 2.20462 pounds
1 kilogram = 35.274 ounces
13 pounds * 1 kg/2.20462 pounds = 13 kg/2.20462 = 5.8967 kg
7 ounces * 1kg/35.274 ounces = 7 kg/35.274 = 0.1984
5.8967 kg + 0.1984 = 6.0951 kg. rounded up to 6.10 kgs.
For x = 7 + (-1) = 6 -> 6/2 = 3
For y = -5 + (-2) = -7 -> -7/2 = -3.5
Midpoint(3, 3.5)