9 inches* 6 beads per inch= 54 beads used.
The integer to represent the change in how many beads you have now is -54 since 54 were used up to make the necklace. You now have less beads than before, so the number should be negative.
Answer:
12
Step-by-step explanation:
10x-11+3x-2+3x+1=180
16x-12=180
16x=192
x=12
2x^2+20x=-38 divide both sides by 2
x^2+10x=-19, halve the linear coefficient, square it, than add that value to both sides of the equation, in this case add (10/2)^2=25...
x^2+10x+25=6 now the left side is a perfect square
(x+5)^2=6 take the square root of both sides
x+5=±√6 subtract 5 from both sides
x=-5±√6 (so answer c.)
Answer:
64
Step-by-step explanation:
Step-by-step explanation:
a. To get 6 cents, one coin needs to be a nickel and the other coin needs to be a penny.
P = P(nickel then penny) + P(penny then nickel)
P = (4/20) (6/19) + (6/20) (4/19)
P = 12/95
b. To get 35 cents, one coin needs to be a dime and the other coin needs to be a quarter.
P = P(dime then quarter) + P(quarter then dime)
P = (3/20) (7/19) + (7/20) (3/19)
P = 21/190
c. To get 20 cents, both coins need to be dimes.
P = P(dime then dime)
P = (3/20) (2/19)
P = 3/190