What is the solution of the system? Use substitution. 3x + 2y = 7 y = –3x + 11 A. (6, -3)
B. (6, -7)
C. {-4,19 } 2
D. (5, -4)
Answers
b. I don't If it help
Karen, Leo, Mariah, Olivia, and Pedro bowled scores of 123, 132, 115, 124, and 131. Leo's score is lower than Karen's. Mariah got the highest score. The sum of the digits in Pedro's score is 7. Olivia's score was 8 points lower than another score. What was each friend's bowling score?
They way I solved this is by making a list of all the possible answers for each person, based on one fact at a time that they give you. Then, you can start looking at multiple, and start ruling things out.
Karen=131
Leo=124
Mariah=132
Olivia=123
Pedro=115
Chad buys peanuts in 2 pounds bags. He repackages them into bags that hold 5/6 pound of peanuts. How many 2 pound bags of peanuts should Chad buy so that he can fill the 5/6 pound bags without having any peanuts left over?
Answers
think about it this way, that for every 5/6 pound bag you are losing 1/6 and 1/6*12=2 therefore the answer is 12
A car wash charges a flat rate for the first 8 minutes of washing time and also charges a certain amount for each additional minute of washing time. Gina took 12 minutes to wash her car and it cost her a total of $5.00. Kris took 17 minutes to wash his truck at a total cost of $6.25.How much is the is the flat rate for the first 8 minutes? show equation to find answer. Plz answer this word problem.
Answers
flat rate = x
so for the first eight minutes they both have the same rate so this is also true Gina took 4 minutes to wash her car and it cost her a total of $5-x Kris took 9 minutes to wash his truck and it cost him a total of $6.25-x so for overtime 4mins=5-x, 9mins=6.25-x 4 times 9 = 36 so 36 mins = (45-9x)=(25-4x) so 45-9x=25-4x subtract 25 from both sides and get 20-9x= -4x subtract add 4x to both sides 20-5x=0 factor out the five 5(4-x)=0 (4-x) must =0 4-x=0 add x to both sides 4=x it cost $4 for flat rate
Kylee bought a pack of 12 cookies one-third of the cookies are peanut butter how many of the cookies in the pack are peanut butter
Answers
One way to find the answer to this question would be to use a bar model. Draw a long rectangle and label it, "12". Then, cut the bar into 3 pieces. Color in one of the boxes. This represents the one-third of peanut butter cookies. Since you split 12 into 3 pieces, divide 12 by 3. You'll get the answer 4. That means out of the 12 pack of cookies, 4 of them are peanut butter. Hope I helped you. :)
12 cookies... . So one third. . Strike a match in your mind? . Yep, multiply 1/3 by 12. . So, 4 cookies are peanut butter.
Sasha drove from her house to the grocery store in 20 minutes. Her return trip took 15 minutes. If the store is 7 miles from her house, what was Sasha's average speed for the round trip, in miles per hour?
Answers
Total time = 35 minutes Total distance = 14 miles
I would set this up as a proportion
14/35 = x/60 (60 minutes in an hour) Now cross multiply and solve. 35x = 840 840/35 = 24 mph
distance = rate * time 7 miles = rate * 20 minutes 7/20 = 20r/20 r = 0.35 mph