Can 25, 32, 60 make a right triangle?
1 answer:
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Answer:
Step-by-step explanation:
For the surface area we need to add up all the areas in the pyramid:
- area of the base
- area of the triangle sides (there are 4 triangles)
Area of the base:
the base is a square, and the area of a square is given by:
where is the length of the side:
, thus:
Area of the triangles:
one triangle has the area given by the formula:
where is the base of the triangle:
and is the height of the triangle:
, thus we have the following:
the expression that represents the surface area of the pyramid is:
substituting our values:
which is option B
For this case we have the following equation:
c + b = 55
Where,
c: number of CDs
b: number of books
For c = 30 we have:
30 + b = 55
From here, we clear the value of b.
We have then:
b = 55-30
b = 25
Note: observe in the graph that when the value of c is 30, the value of b is 25.
Answer:
the amount Alison may spend on books in March if she spends 30 on CDs is:
b = 25
See attached image.
c + b = 55
Where,
c: number of CDs
b: number of books
For c = 30 we have:
30 + b = 55
From here, we clear the value of b.
We have then:
b = 55-30
b = 25
Note: observe in the graph that when the value of c is 30, the value of b is 25.
Answer:
the amount Alison may spend on books in March if she spends 30 on CDs is:
b = 25
See attached image.