4m+2m=7-10+15
6m=12
m=12:6
m=2
For the first, simply plug in the value of x given (x = 2) into the equation:
So, 8 would be your answer.
For the second, the sum of x and 2 would be expressed as x + 2. Twice this sum would be written as 2(x+2). Finally, 8 less than twice that sum would be written as 2(x+2) - 8, which would be your expression.
For the last question, the coefficient refers to the number directly in front of the variable, x. So you need only to check what the x would simplify to in each equation and look for the expression where x has no coefficient (i.e., its coefficient is 1). For Hunter, the coefficient would be 15 (5 × 3x = 15x); for Michael, the coefficient would be 11 (6x + 5x = 11x); for Nate, the coefficient would be 1 (x = 1x); and for Spencer, the coefficient would be 2 (2x = 2x). Thus, Nate's expression has a coefficient of 1 when simplified.
If you know the <span><span>nth</span></span> <span>term of an arithmetic sequence </span><span>and you know the </span><span>common difference </span><span>, </span><span>dd</span><span> , you can find the </span><span><span><span>(n+1)</span>th</span><span><span>(n+1)</span>th</span></span><span> term using the recursive formula </span><span><span><span>a<span>n+1</span></span>=<span>an</span>+d</span><span><span>a<span>n+1</span></span>=<span>an</span>+d</span></span><span> .
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4.43
To find the mean (average) # of sick days taken, you add all the numbers, then divide by the number of employees.
31 ÷ 7 = 4.4285714286 or aprox. 4.43