What is 3x + 7x + 10

fastfastfastfasy

10x +10 = 0

10x = -10

x = -1

Step-by-step explanation:

10x+10

Step-by-step explanation:

If you simplify this expression, combine like terms, 3x and 7x, to get 10x, then add 10 into the expression.

Expected number of people in concert = 7900 people

Step-by-step explanation:

We have given,

In an concert,

if it's not raining , number of people will attend concert = 17000 people

If it's raining , then number of people will attend concert = 4000 people

Since, probability of raining = 70% = 0.7

Then probability of not raining = 30% = 0.3

So,

Expected number of people in concert = 0.3 * 17000 + 0.7 * 4000

Expected number of people in concert = 5100 + 2800

Expected number of people in concert = 7900 people