Answer:
18 1/2 or 37/2
Step-by-step explanation:
To calculate the average of something, we add the numbers and divide by the count of those numbers. In this case, we have this as the sum of the numbers:
9 × 20 + 4 × 19 + 3 × 18 + 5 × 17 + 12
And the number of students as the count:
9 + 4 + 3 + 5 + 1
Now to calculate that out:
(9 × 20 + 4 × 19 + 3 × 18 + 5 × 17 + 12)/(9 + 4 + 3 + 5 + 1) ⇒
(180+76+54+85+12)/(9+4+3+5+1) ⇒
407/22 ⇒
37/2⇒
18 1/2
1. To find out if (0,3) is a solution to y = x +3 you replace x and y with (0,3)
y = x + 3
3 = 0 + 3
3 = 3 Correct
The answer is YES
2. To find out if (1,-4) is a solution to y = -2x you replace x and y with (1,-4)
y = -2x
-4 = -2(1)
-4 = -2 Incorrect
The answer is NO
Answer:
2nd Choice
Step-by-step explanation:
1 week, according to the graph on 1 x axis (weeks) the y axis (tests taken) reaches 10
Answer:
2 imaginary; 2 real
Step-by-step explanation:
You can factor it as ...
f(x) = (x^2 -16)(x^2 +1) . . . . . . . . . x^2-16 is the difference of squares
= (x -4)(x +4)(x^2 +1)
The two linear factors have real zeros; the quadratic factor has two imaginary zeros. There are 2 imaginary and 2 real zeros.
