What is 17/20 - 4/15

Mathematics

1 answer:

Zinaida [17]2 years ago

4 0

Hello there, today you gave us the problem $\frac{17}{20}-\frac{4}{15}$ ,

Our first step is to give them common denominators, which is $\frac{51}{60}-\frac{16}{60}$ , solve it and we get $\frac{35}{60}$ as our answer, which can be simplified down to $\frac{7}{12}$

You might be interested in

Find the surface area of a regular prism iwth height 6 cm, if the base of the prism is: Equilateral triangle with a side of leng

ser-zykov [4K]

Answer:

61.8 square centimeters

Step-by-step explanation:

4 0

2 years ago

The sculpture consists of five identical prisms. JD says the surface area of the sculpture is 44 times the surface area of one p

larisa86 [58]

The complete question in the attached figure

we know that
(see the attached figure n 2 to understand the problem)
[the surface area of one prism]=2*[x*x]+2*[x*y]+2*[x*y]----> 2x²+4xy
[the surface area of the sculpture]=2*[5*x*y]+2*[3*x*x]+2*[3*x*y]--> 6x²+16xy

now
JD says the surface area of the sculpture is 4 times the surface area of one prism
[the surface area of the sculpture]=4*(2x²+4xy)---> 8x²+16xy

we compare the value that JD says with the real value
(8x²+16xy) > (6x²+16xy)
the value that JD says is greater in comparison with the real value
This is because JD should also subtract the areas of eight hidden surfaces.

the answer is
JD should also subtract the areas of eight hidden surfaces