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Question 309108: A total of 50 juniors & seniors were given a math test. The 35 juniors attained an average score of 80 while the 15 seniors attained an average of 70. What was the average score for all 50 students that took the test?
I dont understand how.. to get the answer
Click here to see answer by ankor@dixie-net.com(15638)

Question 309215: how many questions do i have to get right out of 75 in order to get a C?
Click here to see answer by JBarnum(2044)

Question 309215: how many questions do i have to get right out of 75 in order to get a C?
Click here to see answer by solver91311(16868)

Question 309215: how many questions do i have to get right out of 75 in order to get a C?
Click here to see answer by nyc_function(2733)

Question 309319: Mark's average (arithmetic mean) on four tests is 75. What grade does he need on his fifth test to raise his average to an 80?

Click here to see answer by stanbon(57246)

Question 309570: The product of x and y is 40, and the average (arithmetic mean) of x and y
is an odd number. How many possible values are there for x if x is a whole
number?
(A) 1 (B) 2 (C) 3 (D) 4 (E) 5
Click here to see answer by checkley77(12569)

Question 309727: 6y+9+4y=-3
Click here to see answer by rfer(12647)

Question 309726: 2(3-4y)=-10
Click here to see answer by rfer(12647)

Question 309725: 6y/8+12=84
Click here to see answer by rfer(12647)

Question 309723: 7y-3(y+6)=10
Click here to see answer by rfer(12647)

Question 309774: If k is a positive integer, what is the average of 3^k and 3^(k+2)?
Click here to see answer by Alan3354(30983)

Question 309823: 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 ankor@dixie-net.com(15638)

Question 310507: Ruben has scores of 59, 74, and 86 on her tests so far, with one test to go. In order to pass the course, he needs an average of 77. What grade does he need to pass the class?
Click here to see answer by JBarnum(2044)

Question 310586: The average arithmetic mean of (k) scores is 20 . The average of 10 of these scores is 15. Find the average of the remaining scores in terms of (k)
Click here to see answer by stanbon(57246)

Question 311426: The perimeter of a rectangle is 168 inches. the length exceeds the width by 6 inches. Find the length and width.
Click here to see answer by mananth(12270)

Question 311486: The average (arithmetic mean) of 80, 83, 89, and x is the same as the average of 80, 83, and 86. What is the average of 82 and x?
(A)80 (B) 81 (C) 82 (D) 83 (E) 84

Click here to see answer by ankor@dixie-net.com(15638)

Question 311982: What is the average of 8,7,7,5,3,2 and 2?

Click here to see answer by Fombitz(13828)

Question 312099: if i have a 95 in my class and i make a 68 on my exam how do i calculate my grade
Click here to see answer by Fombitz(13828)

Question 312180: How do you figure out what is the average (arithmetic mean)of 8,7,7,5,3,2and 2? I have been out of school for 18 years and have no idea how to do these problems?
Click here to see answer by Alan3354(30983)

Question 312379: In a science test, a class of 30 students had an average of 80. The 20 girls in the class had an average of 85. What is the average of the 10 boys in the class?

Click here to see answer by Fombitz(13828)

Question 312593: Please help me solve this finance: Ben, Jim, Alice, Erin, and Rick are friends. Ben is 20 years old, Jim is 17 years old, Alice is 21 years old, and Erin is 19 years old. The average age of the 5 friends is 20. How old is Rick?
Click here to see answer by mananth(12270)

Question 312497: Solve
-23 ≤3x-6≤ -1
The solution is {x|_≤x≤_}
Thank you very much to anyone who can help me!

Click here to see answer by checkley77(12569)

Question 312769: 1.
Solve.
-6x + 3 - 2x = 3 - 8x
A) x = -16/3
B) Infinitely many solutions
C) x = 3/16
D) No solution
2.
Solve. Round answer to the nearest thousandth.
2x + 3 - ( x + 2) = 3x + 5
3.
Solve. Round answer to the nearest thousandth.
5x + 1 = 21
4.
Select the proper order for solving.
2x + 3(x - 4) + 3 = 12
A) Division Property of Equality
B) Combine like terms
C) Distributive Property
D) Addition Property of Equality
5.
Select the following that makes the statement true.
When you solve a linear equation, your solution could be which of the following?
A) No solution
B) A complex number
C) A real number
D) An ambiguous solution
E) Infinitely many solutions
6.
Solve. Round answer to the nearest thousandth.
3 - (2x + 5) = 4 + 3(5 - x)
7.
Solve. Round answer to the nearest thousandth.
9 - (3x + 7) = 8
8.
Solve. Round answer to the nearest thousandth.
2x = 5x - 12
9.
Solve. Round answer to the nearest thousandth.
(-x/3) - 5 = 2x
A) x = -3
B) x = 3
C) x = -15
D) x = -2.143
10.
Which of the following is not used to solve 4(x - 5) + 3 = 2(x - 5)?
A) Addition Property of Equality
B) Subtraction Property of Equality
C) Combining like terms
D) Distributive Property
E) Multiplication Property of Equality
11.
Solve. Round answer to the nearest thousandth.
(4x - 2)/ 5 = 10
A) x = 13
B) x = 12
C) x = 0
D) x = 10
12.
The solution for the equation 5x - 4(x + 3) = x + 7 is an integer.
A) True
B) False
13.
Solve. Round answer to the nearest thousandth.
-2(2x - 1) = 2(x - 5)
14.
Solve. Round answer to the nearest thousandth.
2x - (x + 5) = -3 + 4(x + 2) - 3x
15.
The second step required to solve -5x + 3 - 2(x + 3) = 25 is the distributive property.
A) True
B) False
16.
Solve. Round answer to the nearest thousandth.
3 - (2x + 5) = -12
17.
Solve. Round answer to the nearest thousandth.
4x = 7x + 24
18.
Solve. Round answer to the nearest thousandth.
4 - (2x - 9) = -19
19.
Solve. Round answer to the nearest thousandth.
3x + 2 = 11
20.
Solve. Round answer to the nearest thousandth.
-3(2x + 1) = 2(x - 2)

Click here to see answer by Fombitz(13828)

Question 312925: Ryan scored 16, 22, and 24 points in 3 basketball games. what is the least number of points he must score to get at least 20 points per a game for the four games?

Click here to see answer by stanbon(57246)

Question 313496: ryans first four test grades are 85 89 87 and 96 what is the lowest grade ryan can get on his next test so that the average of the five test grades will be at least a 90?
Click here to see answer by Fombitz(13828)

Question 313498: the average of a set of seven numbers is exactly 81 if one of the numbers is discarded the average of the remaining numbers is exactily 78 which number was discarded?
a.89
b.92
c.97
d.99
Click here to see answer by scott8148(6628)

Question 313752: Complete.
14 ft2 = _______ in.2

Click here to see answer by rapaljer(4667)

Question 313754: Multiply.
(6 + x)(2 + 5x)

Click here to see answer by Alan3354(30983)

Question 313912: hi, i have two questions:
write each english phrase as an algebraic expression. let x represent the number.
1) the difference of six and half of a number
my answer is: 6-x/2(x over 2)
2) the quotient of three and the difference of five and a number
my answer is: 3/5-x (3 over 5-x)
am i correct?
thanks
Click here to see answer by solver91311(16868)

Question 314437: What is the average (arithmetic mean) of 4x + 5, 7x-6,and -8x+2?
Click here to see answer by rapaljer(4667)

Question 314438: What is the average (arithmetic mean) of 4x + 5, 7x-6,and -8x+2?
can you please brake it down into step so i can understand
Click here to see answer by Fombitz(13828)

Question 313819: A ski company in Vali owns two ski shops, one on the west side and one on the east side of Vali. Is there a difference in daily average google sales between the two stores? Assume equal variances. (a) State the hypotheses for a two a two-tailed test. (b) State the decision rule for a level of significance equal to 5 percent and sketch it. (c) Find the test statistic and state your conclusion.
Statistics East Side Shop West Side Shop
Mean Sales $328 $435
Sample std. dev. $104 $147
Sample size 28 days 29 days
Click here to see answer by Awesome4ever(1)

Question 315550: Kim’s average score on her first three math tests is 78. She scored 63 on the first test. On the third test, she scored 9 more than he scored on her second test. What did she score on the second and third tests? Set up an equation, then solve and explain.
Click here to see answer by Fombitz(13828)

Question 316178: Hello I need help sovlving the below problems: I'm not very good at word problems. Could you please help. I need to show my work also. Thank you
1) The sum of two numbers is greater than 12. The second number is 8 more than the first. What are the possible values for the first of the two numbers? In your answer, denote the first number by X.
2) Max purchased a prepaid phone card for $15. Long distance calls cost 7 cents a minute using this card. Mai used her card only once to make a long distance call. If the remaining credit on her card is $12.83, now many minutes did her call last?
3) Ed will rent a car for the weekend. He can choose one of two payment plans. The first plan costs $55.98 for 2 days plus 13 cents per mile. The second plan costs $63.98 for two days plus 11 cents per mile. How many miles does Ed need to drive for the two plans to cost the same?
4) A local hamburger shop sold a combined total of 802 hamburgers and cheeseburgers on Monday. There were 52 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Monday?

5) Solve for Z: 4z + 13 = 85
Click here to see answer by mananth(12270)

Question 316399: John has a total of 4 tests. His scores so far are 88, 90, and 94. He has to average at least 92 to get an A. What scores on the last test will give hm an A?
Click here to see answer by mananth(12270)

Question 316869: if 5a+5b=45, what is the average(arithmetic mean) of a and b?
Click here to see answer by Fombitz(13828)

Question 316869: if 5a+5b=45, what is the average(arithmetic mean) of a and b?
Click here to see answer by checkley77(12569)

Question 316870: If a+b=7(c+d), what would be the average (arithmetic mean) of a, b, c and d?
Click here to see answer by Fombitz(13828)

Question 316955: If x+y=12, and y+z=11 and z+x=13, what is the average of x, y and z?
Click here to see answer by Fombitz(13828)

Question 316966: the average mark of 4 tests is 72 if the numbers are 60 and 80 find the third number
Click here to see answer by JBarnum(2044)

Question 317156: A basketball team won two out of their last four games. In how many different orders could they have two wins and two losses in the four games?
Click here to see answer by stanbon(57246)

Question 317105: Peter took five tests. The average of four of the tests is 84. What score did he get on his fifth test if the average of the five tests is 80?

a 64 b 70 c 80 d 82 e 84

Click here to see answer by Fombitz(13828)

Question 317153: A woman’s height, h is related to the length of the femur, f (the bone from the knee to the hip socket) by the formula
F=0.432 h – 10.44 (In the formula) both h and f are measured in inches.
A partial skeleton of a woman is found in which the femur length f is 15.67 inches long. Police find the skeleton in an area where a woman slightly over 5 feet tall is missing for over a year. Can the partial skeleton be that of the missing woman? Explain. Show work by solving h.

Click here to see answer by holyrowly(1)

Question 317489: The average of 5/6 and 7/12 minus the average of 2/3 and 3/4 is equal to
A)1/24 B)0 C)-1/12 D)1 E)1/24
Click here to see answer by JBarnum(2044)

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