Let the number be n. Then 2(n-10) = 6n + 14.
Multiplying out the left side, 2n - 20 = 6n + 14. Thus, -34=4n, and n = -17/2.
So to complete the square in
ax^2+bx+c=d form
make sure a=1
subtract c from both sides
take 1/2 of b and square it
add that to both sides
factor perfect square
1x^2-1x-2=0
a=1
move c to other side
add 2 to oth sides
x^2-1x=2
take 1/2 of b and square it
1/2 of -1=-1/2
squaer it
1/4
add that to both sides
x^2-1x+1/4=2+1/4
factor left side
(x-1/2)=2+1/4
first blank is 1/2
2+1/4=8/4+1/4=9/4
blanks are
1/2 and 9/4
Answer:
1.) : You should buy the second one (16cm x 45cm)
2.) : Between the smallest and the biggest vases, the cone face holds 396 more water than the smallest one.
Step-by-step explanation:
10 x 40 = 400
16 x 45 = 720
18 x 18 = 324
———————
720 - 324 = 396
Answer:
Step-by-step explanation:
-3x(5-4) + 3(x-6)
-15x + 12 + 3x - 18
-15x + 3x +12 - 18
-12x - 6
