Answer:
B. 2x + 9y = 18
Step-by-step explanation:
Answer:
1 in 4,
Step-by-step explanation:
You should know that a standard 52-card deck is made up of four suits of 13 cards each. This means that there are 13 spades and 4 aces (the Ace of Spades is both). So the probability of drawing any spade is 1 in 4, and the probability of drawing any ace is 1 in 13.
We will represent everything in cents
nickles are worth 5 cents and dimes are 10 cents
n=number of nickles
d=number of dimes
60 total coins
n+d=60
total is 430 cents
5n+10d=430
divide both sides by 5
n+2d=86
we gots
n+d=60 and
n+2d=86
eliminate
multiply first equation by -1 and add to 2nd equation
-n-d=-60
<u>n+2d=86 +</u>
0n+1d=26
d=26
so
n+d=60
n+26=60
n=34
34 nickles and 26 dimes
X+16/x=4. x^2+16-4x=0. x=8+-^17
I hope this helps you
x^4-10x^2+24=0
x^2 -6
x^2 -4
(x^2-6)(x^2-4)=0
x^2-6=0 x^2=6 x=square root of 6
x^2-4=0 x^2=4 x=-2 or x=2
