Answer:
77
Step-by-step explanation:
Add all the numbers together (74+88+79+70+74) then divide by the amount of numbers there are (in this case 5) So (74+88+79+70+74=385) (385/5=77)
The prime factorization of 15 is 1 * 3 * 5
Answer:
$6.75 each
Step-by-step explanation:
141.75 decided by the 21 calculators gets a grand total of $6.75 each
Answer:
(-1,1)
Step-by-step explanation:
x + 9y = 8
-6x - 9y = -3
Add the two equations together to eliminate y
x + 9y = 8
-6x - 9y = -3
---------------------
-5x = 5
Divide by -5
-5x/-5 = 5/-5
x = -1
Now solve for y by substituting into the first equation
x+9y = 8
-1 + 9y =8
Add 1 to each side
-1+1 + 9y = 8+1
9y=9
Divide each side by 9
9y/9 = 9/9
y = 1
