If they can be multiplied or divided by the same number and they both have the same answer it is equivelent.
For this case, the first thing we must do is define a variable.
We have then:
x: number of initial cards.
We write now the equation that represents the problem:
x - (4) * (6) = 54
From here, we clear the value of x:
x = (4) * (6) + 54
Rewriting:
x = 24 + 54
x = 78
Answer:
The number of cards that william has initially is 78. Lack of information to know how many cards his friends have.
ANSWER
and
EXPLANATION
Since corresponding angles are equal,
Alternate angles are also equal, therefore,
Equation (2) minus equation (1) gives,
We put in to equation (1)
This pyramid has 4 sides shaped like triangles and a square base.
The total surface area is the sum of the areas of the 4 triangular sides and the square base.
Each triangular side has 0.7 ft base and an 8-ft height.
The square base has side 0.7 ft.
Area of the sides:
area of a triangle = bh/2
area of 4 congruent triangles = 4 * bh/2 = 2bh = 2 * 0.7 ft * 8 ft = 11.2 ft^2
Area of the square base:
area of a square = s^2 = (0.7 ft)^2 = 0.49 ft^2
total surface area = 11.2 ft^2 + 0.49 ft^2 = 11.69 ft^2
Answer: A. 11.69 ft^2