Answer:
160
Step-by-step explanation:
Plug in 6 for r, and 8 for s in the expression:
(r)(s) + (14)(s) = (6)(8) + (14)(8)
Remember to follow PEMDAS. First, multiply, then add:
(6 * 8) + (14 * 8)
48 + 112
112 + 48 = 160
160 is your answer.
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Answer:
Number 27:Population density refers to the number of people who live in a defined land area (usually square miles or square kilometers). So, if two million people live in ten square miles, the population density is two hundred thousand people per square mile.
Number 29:Your heart beats about 100,000 times in one day. And about 35 million times in a year.And 128 beats in one minute
Step-by-step explanation:
Step-by-step explanation:
I think that X2 should be x squared
Let:
x = the middle integer
Then the 3 consecutive integers are:
x - 1, x, x + 1
The product of the first and the third integer:
(x - 1)*(x + 1) = x^2 - 1
is equal to:
3 more than 3 times the second integer:
3x + 3
So:
x^2 - 1 = 3x + 3
Solve:
x^2 - 3x - 4 = 0
(x-4)(x+1) = 0
x = -1 and 4
Since x is the middle integer, we have two sets of solutions:
3,4,5 and -2,-1,0
