Answer:
the 4th one, 5 7/9
Step-by-step explanation:
Answer
Find out the how many cats were at the shelter on Thursday .
To prove
let us assume that the number of cats in the animal shelter be x.
let us assume that the number of dogs in the animal shelter be y.
As given
An animal shelter spends $5.00 per day to care for each cat and $7.00 per day to care for each dog.
Brayden noticed that the shelter spent $193.00 caring for cats and dogs on Thursday.
Than the equation becomes
5x + 7y = 193
Brayden found a record showing that there were a total of 29 cats and dogs on Thursday.
Than the equation becomes
x + y = 29
Than two equation are
5x + 7y = 193 , x + y = 29
Multiply x + y = 29 by 7 and subtrscted from 5x + 7y = 193 .
5x - 7x + 7y - 7y = 193 - 203
5x - 7x = 193 - 203
-2x = -10
x = 5
Therefore the number of cats are 5 on Thursday .
Answer and explanation:
Given : A driving exam consists of 29 multiple-choice questions. Each of the 29 answers is either right or wrong. Suppose the probability that a student makes fewer than 6 mistakes on the exam is 0.26 and that the probability that a student makes from 6 to 20 (inclusive) mistakes is 0.53.
Let X be the number of mistake
To find : The probability of each of the following outcomes.
a) A student makes more than 20 mistakes
i.e.
b. A student makes 6 or more mistakes
i.e.
c. A student makes at most 20 mistakes
i.e.
Using 'a' part
d. Which two of these three events are complementary?
The complement of an event happening is the exact opposite: the probability of it not happening.
According to definition,
Option a and c are complementary events.
W is 5 because-25 divided by 5 is -5