Answer:
x = 2
Step-by-step explanation:
2(x+4)=12
2x+8=12........multiplying each number in the bracket by 2
2x = 12-8
2x = 4...... dividing both sides by 2
x = 2
Answer:
60
Step-by-step explanation:
To find the mean;
add up the data
(50+60+60+70) =240
Then divide by the number of data points
240/4 = 60
The mean is 60
To solve for x^2 - 40 = 9, take the square roots of both sides and solve.
The answer is x = 7, -7.
Answer:
2
Step-by-step explanation:
6-4 over 2-1
2 over 1
=2
I hope this is correct and have a great day
