Dox needs to solve the system of equations below 4x + 5y = 7
2x - 3y = 9

He decides to use the elimination method to cancel out the x terms in order to first solve for y. Dox uses the following steps:

Step 1: 4x + 5y = 7
-2(2x) - 3y = 9

Step 2: 4x + 5y = 7
-4x - 3y = 9

Step 3: 2y = 16

Step 4: y = 8
Did Dox use the correct steps to solve for y?

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68