10
sum is add
cube is to the 3rd powr
19+x³
11.
product means multiply
3 times y is no more than (equal to or less than ) 21
3y≤21
no need to solve
12. 2 times difference is 10
difference is subtract
2(z-12)=10


Hence there is no such natural numbers exist.
Answer:

Step-by-step explanation:
r = Radius of semicircle = 
Area of semicircle is given by

The area of the semicircle is
.
Answer:
cheating in entrance
Step-by-step explanation:
circumference: 14π
area: 49π
Answer:
sin= opposite leg/hypotenuse
Sin(a)=12/37
Step-by-step explanation: