Answer:
she has 3 quarters
Step-by-step explanation:
let's call the amount of dimes D
let's call the amount of quarters Q
you know that she has 11 coins in total,
so D + Q = 11.
you also know that each dime is worth 10 cents.
and each quarter is worth 25 cents.
so 10d + 25q = 155
this is a system of equations. solve by substitution:
d = 11 - q
10d + 25q = 155
10(11 - q) + 25q = 155
110 - 10q + 25q = 155
15q + 110 = 155
15q = 45
q = 45/15
q = 3
Answer:
tax difference = 3.4 - 1.1 = 2.3$
Step-by-step explanation:
tax on the book = 12.95 × 8.5% = 1.1
tax on the game = 39.90 × 8.5% = 3.4
Answer: 0.064
Step-by-step explanation:
Binomial probability formula :-
, where P(x) is the probability of getting success in x trials, n is total number of trials and p is the probability of getting succes in each trial.
Given : The proportion of the homes constructed in the Quail Creek area include a security system :
Now, if three homes are selected at random, then the probability all three of the selected homes have a security system is given by :-
Hence, the probability all three of the selected homes have a security system = 0.064
Answer:
slope:5
y intercept: -6
Step-by-step explanation:
Answer:
f= 2x+3/x
Step-by-step explanation:
divide both sides by x