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Question 317490: First question :
A total of 50 juniors ande seniors were given a mathematics test. The 35 juniors
attained an average score of 80while th 15 seniors attained an average of70.
What the average score for all 50 students who took the test?
A. 73
B. 75
C. 76
D. 77
E. 78

SECOND question :
Adam tried to compute the average of his 7 test scores. He mistakenly divided
the correct sum of all of his test scores by 6 , which yielded 84.
What is Adam's correct average test score?
A. 70
B. 72
C. 76
D. 77
E. 98

Click here to see answer by Edwin McCravy(8880)

Question 317516: Solve the following set of equation by both graphing method and also by addition.
Prepare a paragraph comparing and contrasting the two methods.

3x+4y = -5
5x+6y = -7
Please :)
Click here to see answer by stanbon(57222)

Question 317530: A drug is injected into a patient and the concentration of the drug is monitored. The drug's concentration, C(t), in milligrams per liter after t hours is modeled by C(t)=(7t)/(2t^2+3). Estimate the drug's concentration after 4 hours. Round to the nearest hundreth. The choices are 2.69 m/l, 2.55 m/l, 0.94 m/l and 0.80 m/l. I cannot get any of these answers when I try to solve the problem.
Ken
Click here to see answer by Fombitz(13828)

Question 317529: A company that produces bicycles has costs given by the function C(x)=25x+20000, where x is the number of bikes manufactured and C(x) is measured in dollars. The average cost to manufacture each bike is given by C(x)=(25(x)+20000)/x. Find C(250) and round to the nearest dollar, if necessary. The choices are $33, $135, $105, and $30. I believe this is an "average cost function" question, but no matter what I do to solve this question, I don't get any of these answers.
Ken
Click here to see answer by rfer(12644)

Question 317534: What is the average (arithmetic mean) of 8, 7, 7, 5, 3, 2, and 2?
Click here to see answer by Fombitz(13828)

Question 317533: Solve each system by addition.
x – 2y = -1
-x + 5y = 4

Click here to see answer by Fombitz(13828)

Question 317539: Solve each system by the addition method. Determine whether
the equations are independent, dependent, or inconsistent
X – y = 3
-6x + 6y = 17

Click here to see answer by Fombitz(13828)

Question 317538: Solve each system by addition
2x = 2 – y
3x + y = -1

Click here to see answer by Fombitz(13828)

Question 317542: Solve each system by the addition method. Determine whether
the equations are independent, dependent, or inconsistent
3x – 2.5y = 7.125
2.5x – 3y = 7.3125

Click here to see answer by Fombitz(13828)

Question 317536: Solve each system by addition
3x + 5y = -11
X – 2y = 11

Click here to see answer by Fombitz(13828)

Question 317671: a crafts store bought 46 1/3 ounces of potpouri.The shop divide the potpouri into 1 1/3 ounce bags and sell each bag for $2.50.
A. How many 1 1/3 ounce bags of potpouri can the shop make?
B. If all the bags are sold, how much money will the shop take in?
Click here to see answer by mananth(12270)

Question 317670: elizabeth walks 8 miles for a charity even.She walks half the distance during the first two hours and a fourth of the remaning distance during the next half hour.How far does she have to go to complete the walk?
Click here to see answer by mananth(12270)

Question 317669: find a number between 9/8 and 10/8. write your answer as improper fraction and as mixed number.
Click here to see answer by jim_thompson5910(28476)

Question 317699: The average of 5 numbers is between 50 and l00. Their sum cannot be
A)258 B)260 C)420 D)480 E)505
Click here to see answer by Fombitz(13828)

Question 318497: Jack had an average score of 85 on his first eight quizzes, and an average score of 81 on his first nine quizzes. What score did he receive on his ninth quiz?

Click here to see answer by stanbon(57222)

Question 318581: On three consecutive passes, a football team gains 10 yards, loses 39 yards, and gains 39 yards.?
What number represents the total net yardage?
Click here to see answer by checkley77(12569)

Question 318655: what is the average grade for scores of 68,70 and a 78

Click here to see answer by JBarnum(2044)

Question 318872: How can you use probability theory to increase your odds of winning at Blackjack?
Click here to see answer by Fombitz(13828)

Question 318992: Multipy and simplify
(29 x² = 13x – 7) (8x -15)

Click here to see answer by Fombitz(13828)

Question 319490: The average of 10 students’ test scores was 69. Three students scored 80,60, and 40 respectively. Three other students scored 90, and two students scored 50. The other two students received the same score. What were their scores?
Click here to see answer by ankor@dixie-net.com(15624)

Question 319880: If you have a scores of 82, 77 and 87 on the frist 3 tests for math 100, what scroe would you have to get on the fourth test to earn a B (83% average)?
Click here to see answer by rfer(12644)

Question 319881: An investment of $10000 is divided into two accounts, one for stocks and one for mutual funds. The value of the stock account is 2000 less than twice the value of mutual funds account. Find the amount in each account.
Click here to see answer by rfer(12644)

Question 320796: Before she took her last exam, the average of Tara’s exam scores was 89. She figures that if she scores 97 on the last exam, her average for all the exams will be 90. If she scores a 73, her average for all the exams will be 87. How many exams, including the last one, are given in the class?

Click here to see answer by solver91311(16868)

Question 320656: A student receives his grade report from a local community college, but the GPA is smudged. He took the following classes: a 2 hour credit art, a 3 hour credit history, a 4 hour credit science course, a 3 hour credit mathematics course, and a 1 hour science lab. He received a “B” in the art class, an “A” in the history class, a “C” in the science class, a “B” in the mathematics class, and an “A” in the science lab. What was his GPA if the letter grades are based on a 4 point scale? (A=4, B=3, C=2, D=1, F=0)
Click here to see answer by ankor@dixie-net.com(15624)

Question 320964: How do you find the average (arithmetic mean) of 8, 7, 7, 5, 3, 2, and 2?
Click here to see answer by nerdybill(6948)

Question 320989: Melissa received 8 out of 22 on her first test and 3 out of 22 on her second test. What was her average for the two tests?
A) 24% B) 25% C) 50% D) 26% E) 32%
Click here to see answer by ankor@dixie-net.com(15624)

Question 321013: A student received test scores of 82%, 94%, 89%, and 91%. What is the student's test average?
Click here to see answer by josmiceli(9649)

Question 321885: Avg in Math Number of Students
A 8
B 12
C 5
D 4
E 3
Half of the students that made an A failed the last test and now have a B. What percent of the class now has a B average in math class?

Click here to see answer by stanbon(57222)

Question 322033: The area of a rectangle is 45 square cm. If the length is 4 cm greater than the width, what are the dimension of the rectangle?
Click here to see answer by Jk22(389)

Question 322026: The average of seven different positive integers is 7 . what is the largest possible value of any of these numbers ?
Click here to see answer by Jk22(389)

Question 322026: The average of seven different positive integers is 7 . what is the largest possible value of any of these numbers ?
Click here to see answer by nyc_function(2733)

Question 322907: IF THE AVERAGE OF THREE NUMBERS IS V IF ONE OF THE NUMBERS IS Z AND ANOTHER IS Y WHAT IS THE REMAINING NUMBER

Click here to see answer by stanbon(57222)

Question 323345: On three tests, each graded on a scale of 0 to 100, Jim had average score of 78. If Jim pulls his average up to 84 after taking two additional tests, what is the lowest possible score he could have received on one of the last two tests?
Click here to see answer by nerdybill(6948)

Question 323512: I am attempting to find the slope and y intercept of the line. I am expected to write a fractional answer in lowest terms.
My question is what is the slope. I understand the equation to get this is
m=y1-y2 over x2-x1
y= -4/3x - 10/7
can you please assist?
Click here to see answer by stanbon(57222)

Question 323609: The average age of boys & girls in a class is 10.5 yrs. That of the boys is 10.6 & that of the girls is 10.1. If there are 60 boys in the class how many girls are there?
Click here to see answer by mananth(12270)

Question 323608: The average of 6 numbers is 10. If the average of 4 numbers is 12, then what is the average of the remaining 2 numbers?
Click here to see answer by stanbon(57222)

Question 323608: The average of 6 numbers is 10. If the average of 4 numbers is 12, then what is the average of the remaining 2 numbers?
Click here to see answer by josmiceli(9649)

Question 323608: The average of 6 numbers is 10. If the average of 4 numbers is 12, then what is the average of the remaining 2 numbers?
Click here to see answer by mananth(12270)

Question 323816: An apartment costs $450 a month to rent, plus a $400 security deposit. Write an expression for the cost of renting for m months.
Click here to see answer by msgmhenderson(11)

Question 323810: describe a situation that can be represented by the algebraic expression t+5.
Click here to see answer by msgmhenderson(11)

Question 323815: is the given number a solution of the equation?
c=2c-4;8
Click here to see answer by Fombitz(13828)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330