Answer:
the number is 65
Step-by-step explanation:
the same number is added. so let the number be 'x'
the equation can hence be written as:
15 + x / 31 + x = 5 / 6
(now cross multiply)
6 (15 + x) = 5 (31 + x)
90 + 6x = 155 + 5x
6x - 5x = 155 - 90
x = 65
Answer:
c-119= what he still needs to save
Answer:
So we have a triangle and a semicircle.
If the triangle is equilateral, this is:
AB = BC = 6cm
Then the area of the triangle is equal to (base*height)/2
in this case:
A = (6*6)/2 = 36/2 = 18cm^2.
And the diameter of the semicircle is equal to 6cm, then the diameter is 3cm
And if the area of a circle is A = pi*r^2
then the area of half a circle is:
A = (pi/2*)3^2 = pi*4.5cm^2
Then, the area of the triangle plus the area of the semicircle is:
Total area = 18cm^2 + pi*4.5^2
I can’t help you but here are some notes I took on the topic
