Seven fish were caught the weights were 15, 16, 15, 13, 19, 20, and 21 what is the mean weight of these fish

17

Step-by-step explanation:

To find the mean of a data set, you add all of the values together, then divide by how many values there are in the set. Lets break this down into a few steps:

            15+16+15+13+19+20+21= 119

           There are 7 numbers in this set, so 119÷7=17

So the mean weight of the fish is 17

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

45

step-by-step explanation: