Yes because the number say on one side
I don’t feel like doing it but I we’ll tell you how to do it you multiply it by 3 so 6 x 3 equals 18 just in negative do 18 x 3 equal 54 so every other on is a negative it’s Simone
Answer:
87
Step-by-step explanation:
First we need to set up our variables:
x = first number
x + 1 is our second number
x + 2 is our third number
x + 3 is our fourth number
Now we make our equation for the sum of these four consecutive integers:
x + x + 1 + x + 2 + x + 3 = 354
After gathering like terms we have:
4x + 6 = 354
Subtract 6 from both sides of the equation results in:
4x = 348
Next we divide both sides by four:
x = 87
To check our work we plug 87 to our other variables and get
x + 1 = 88
x+ 2 = 89
x + 3 = 90
87 + 88 + 89 + 90 = 354 is true so our solution worked. The least integer is 87.
9514 1404 393
Answer:
3
Step-by-step explanation:
The common difference of an arithmetic sequence is the slope of the equation that describes it. The slope formula is useful in this case:
m = (y2 -y1)/(x2 -x1)
m = (219 -213)/(4 -2) = 6/2 = 3
The common difference of the corresponding arithmetic sequence is 3.
Cosine law
a²=b²+c²-2ab*cosA
a²=13²+11²-2*13*11*cos(108)≈378.37
a≈19.45