Answer:
Step-by-step explanation:
XYZ
The first one
I hope I helped you.
Answer: y = 3x - 6
Step-by-step explanation: A line that is parallel to another line must have the same slope, so you already have y = 3x + b. To find b, use the point that they give. b is the y-intercept, so just subtract 3(x) from the y coordinate of the point, where x is the x-coordinate of the given point.
Answer:

Step-by-step explanation:
Given
Total number of bouquets sold yesterday 
Total number of rose bouquets sold yesterday 
Then the probability of selling a rose bouquet out of total 50 bouquet is

Probability of selling other than rose bouquet out of total 50 bouquet is
probability of selling a rose bouquet
Substituting the given values in above equation we get -

Probability that the next bouquet sold will be a rose bouquet

Answer:
400
Step-by-step explanation:
Given:
Number of mocha cupcakes in a day = 340
Total number of cupcakes sold that day = 
To find:
Total number of cupcakes sold by the bakery
Solution:
Let x denotes total number of cupcakes sold by the bakery.
According to question,

So,
Total number of cupcakes sold by the bakery = 400