Answer: -13x^2 + 10x + 4
Step-by-step explanation:
group all of the same variables together to simplify the equation.
-7 - 6 = -13 // the x^2 value
-5 + 15 = 10 // the x value
4 is the only number without an exponent so leave it alone.
Answer:
Sum of (k*7) with i=1 to n=4
Step-by-step explanation:
Add 8.1 to both sides to find x!
hope this helps :-)
Answer:
Twice ; c = 2a ; a = c/2
Step-by-step explanation:
Since the drawing area has been gridded, accurate calculation could easily be performed ;
Rope A occupies 5 boxes
Rope C occupies 10 boxes
Hence,
10 boxes for C / 5 boxes for A
Therefore,
Rope C is Twice the length of Rope A.
If length of Rope A = a ; length of Rope C = c
Then, a multiplication equation for the length of Rope C equals ; c = 2a
Division equation :
a = c/ 2