The sum of two numbers is 80. Their difference is 38. What is the product of these two numbers?

The product of these two numbers is 1239.

Step-by-step explanation:

Given that

a + b = 80

a -  b = 38

Add both equation :

a + b = 80

a -  b = 38

2a = 118

a = 59

Put value of a in any 1st equation

a + b = 80

b =  80 - 59

b = 21

Product :

a x b = 59 x 21

        = 1239

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.