The correct answer would be Choice D.
In this problem, the only change that was made was the order that you added the functions F and G. Since addition is commutative, we can reverse the order of the numbers being added without changing the problem.
To find the answer, find the area of one of the triangles by doing A=(1/2)Bh, then multiply that answer by 4 to get all four triangles, and then add the area of the square base.
Area one Triangle= (1/2)(5)(6)=15
Area All Triangles= 5*4= 60
Area of Square Base= 5*5= 25
Surface Area of Prism= Area of All Triangles+Area of Square Base
SA= 60+25= 85
The answer is 85 square inches
What kind of math is this
Answer: %53.333333333333 or 53 1/3
Step-by-step explanation:
Answer: the speed of the plane in still air is 135 km/h
the speed of the wind is 23 km/h
Step-by-step explanation:
Let x represent the speed of the plane in still air.
Let y represent the speed of the wind.
Flying to England with a tailwind a plane averaged 158km/h. This means that the total speed of the plane is (x + y) km/h. Therefore,
x + y = 158 - - - - - - - - - - - - - -1
On the return trip, the plane only averaged 112 km/h while flying back in the same wind. This means that the total speed of the plane is (x - y) km/h. Therefore,
x - y = 112 - - - - - - - - - - - - - -2
Adding equation 1 to equation 2, it becomes
2x = 270
x = 270/2 = 135 km/h
Substituting x = 135 into equation 2, it becomes
135 - y = 112
y = 135 - 112
y = 23 km/h
