Answer:
x= -3
Step-by-step explanation:
x equals to -3 is the standard form
1+3+5+7+...+999 =
= 1+2+3+4+...+500
+1+2+3+...+499
= 2·(1+2+3+...+499) + 500
= 2·(499·500)/2 + 500
= 499·500 + 500
= 500·(499 + 1)
= 500·500
= 250.000
Answer:
sorry I can only answer b.
3 sec = 36 feet
6 sec = 72 feet
9 sec = 108 feet
Answer:

Step-by-step explanation:
To calculate the result of that mutiplication you have to firs evaluate the first term of the second function multipying the whole first function, woudl be like this:

Now that you have this, you multiply the second term from the second function to obtain:

Now you just have to add both results:

+ 
And the result of the sum would be:
