1. A used book store also started selling used CDs and videos. In the first week, the store sold a combination of 40 CDs and videos. They charged $4 per CD and $6 per video and the total sales were $180. Set up the system of equations you would use to solve this problem. Let x = CDs and y = videos. x + y = 180 4х + бу — x - y = 180 4х — бу 3 40 3D 40 %3D

Q: Anna is selling tickets to the school's gymnastics competition. On the first day, she sells 5 adult…

A: Given:Let x be a adult ticketsLet y be a child ticketsFirst day:Adult tickets =5Child…

Q: .Jeremy bought x pounds of peanuts for $4.50 per pound and y pounds of cashews for $7.05 per pound…

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Q: Which variable would it be easiest equations? * 9х + у %3D 14 5х + 7y 3D 11 The x in the top…

A: We need to isolate y  This is more easy

Q: Mike invested $7,500 total in two bank accounts. Once account paid 4% interest and the other account…

A: As it is given that x represent the amount invested in the 4% account and y represent the amount…

Q: 1. Solve for x: 2(х+ 7) - 3(2x-4) %3 -18 A. x = 5 В. х%3D 11 С. х3-11 D. x = -5

A: Given that:  1. 2(x+7)-3(2x-4)=-18       NOTE: As per our answering guidelines, we can only answer 1…

Q: 5) ( and yogurt cost $0.75 each. We need to buy three times as much fruit as yogurt. Using F for…

A:

Q: Charlene owns a bookstore. She purchases used books from customers. She pays $2.50 for each…

A: Form the each equation according to given in the question

Q: The system of equations X- y+ z 2 3x - y + 2z = -6 and 3x + y + z = -18 has

A:

Q: 9. a1 = 1, a12=1, a31 = -1, a32 = 2, b3 = -3; x₁ = 1, 10. a1 = 0, b₁ =9, a12 = 3, b₂ = 8; a21 =3, b₁…

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Q: The Cooper family, consisting of 6 children and 2 adults, goes to the movies and pays a total of…

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Q: A local community sold 125 concert tickets recently. The dollar amount collected was $835. Adult…

A: Given  A local community sold 125 concert tickets recently. The dollar amount collected was $835.…

Q: Charlie goes to his piggy bank and finds 35 coins, all nickels and quarters, worth $5.15. Which…

A: Let N be the number of nickels and Q be the number of quarters. In total Charlie found 35 coins. So,…

Q: Calculate the value of m and n from the following system of linear equation -5x+2y=-51 -x-y=-6

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Q: One alloy contains 15% silver and a second alloy contains 40% silver. How many kilograms of each…

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Q: Ahmed wants to make an award made out of different metals. A portion of the trophy is 80% silver and…

A: Given: Ahmed wants to make an award made out of different metals. A portion of the trophy is 80%…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.