Here you have an equilateral triangle. Because of this you know that all angles are also the same as each other. We know that the angles in an equilateral triangle are 60°.
so let's set 7x + 4 = 60
Subtract 4 from both sides: 7x = 56
Divide both sides by 7: x = 8
In scientific notation, in would be 6.3825*10 to the 4th power
The top answer on your screen is the answer. Hope this help
3 cars hold 15 people so...
1 car holds 5 people.
Therefore...
33 cars hold 165 people.
