Answer:
30.9 cm²
Step-by-step explanation:
To find the surface area of this figure, we find the area of the base and the 3 identical sides.
The base is split into two identical right triangles. Let's find the area of one and multiply by two.
Half of 3: 1.5
There are two right triangles:
The area of one of the sides will be the same thing, except the height is 6.
There are 3 sides identical to this one:
.
Add 27 and 3.9:
Hope this helped!
Answer:
maria spent her money so hers decreased
Step-by-step explanation:
8(3)+3(5)
24+15
$39
All you do is substitute the numbers in the expression.
This is the concept of proportionality, given that z is directly proportional to x and inversely proportional to y then:
zαx/y
z=(kx)/y
where;
k is the constant of proportionality given by:
k=zy/x
but when x=3 and =6 then z=9.5
therefore:
k=(9.5*6)/3
k=19
hence the formula for z will be:
z=(19x)/y
the value of z when x=8 and y=12 will be:
z=(19*8)/12
z=12 2/3
