Answer:
x = (1 ±√41)/6
Step-by-step explanation:
10 -6x -9x² = -9x
9x² -3x -10 = 0 . . . . . subtract the left side
9(x² -1/3) -10 = 0 . . . factor first two terms
9(x² -1/3 +1/36) -10 -9/36 = 0 . . . . complete the square
9(x -1/6)² = 41/4 . . . . . add 41/4
x -1/6 = ±√(41/36) . . . . divide by 9, take the square root
x = 1/6(1 ± √41) . . . . . . .add 1/6
Let's say make the shapes, some variable name
say
⛁ ⚪ ◽ ▯
a b c d
so.. if take those are the shapes provided
then we can take a look at the first set and we can say that
2a + b + c = 20
a + 4d + b = 19
a + c = 9
3c + d + a = 19
thus
and surely you can find the other two
6+7=13 is the another way to write ...
hope it is helpful.Thankyou!!!!
Answer: $5.33
Step-by-step explanation:
Bliss was able to collect $18 in total.
Out of this total, she received a $2.00 bronze star donation and the rest were 3 Silver star donations.
This means that the 3 equal silver star donations added up to:
= 18 - 2
= $16.00
This means that each silver star donation was:
= Amount in total / Number of silver stars
= 16 / 3
= $5.33