Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

Tutors Answer Your Questions about expressions (FREE)

Question 1042294: Convert 123 times 10^12 miles into kilometres if 1km=5/8 mile. Find to 3 sig fig
Click here to see answer by josgarithmetic(39623)

Question 1042497: 6m^8 over 42n^5z divided by [-12m^5n over 49z]=
Click here to see answer by stanbon(75887)

Question 1042496: 6m^7 over 42n^6z divided by [-12m^2n over 49z]
Click here to see answer by stanbon(75887)

Question 1042533: 8 more than three times a number is equal to 6 less than the number. Find the number.
Click here to see answer by ikleyn(52831)

Question 1042543: 8 subtracted from a number and the difference is doubled, the results is 5 more than the number. Find the number
Click here to see answer by josgarithmetic(39623)

Question 1042535: If 8 is subtracted from a number and the difference is doubled, the results is 5 more than the number. Find the number.
Click here to see answer by ana@10(4)

Question 1042562: The length of a rectangle is 7 meters more than the width. The perimeter is 46 meters. Find the length of te rectangle.
Click here to see answer by ana@10(4)

Question 1042560: The perimeter of a rectangle is 96ft. The length is 6ft. less than twice the width. What is the width of the rectangle?
Click here to see answer by Alan3354(69443)

Question 1042606: The given number [((1+i)i+1)i]i+1 is equivanlent to
A) 0
B) 1-i
C) 1
D) 1+i
Click here to see answer by jim_thompson5910(35256)

Question 1042606: The given number [((1+i)i+1)i]i+1 is equivanlent to
A) 0
B) 1-i
C) 1
D) 1+i
Click here to see answer by ikleyn(52831)

Question 1042636: The length of a field in feet is a function f(n) of the length n in yards. Write a function rule for this situations
Click here to see answer by solver91311(24713)

Question 1042825: If = 2500, then a equals
A) 3
B) 4
C) 5
D) 6
Click here to see answer by jim_thompson5910(35256)

Question 1042827: A manufacturer sells sets of golf clubs to a retail sports store for 25 percent more than they cost to produce. The retail store sells a set of those clubs to a customer for a 30 percent profit. The price the customer paid for the clubs was what percent greater than the cost of production?
A) 50%
B) 55%
C) 60%
D) 62.5%
Click here to see answer by jim_thompson5910(35256)

Question 1042829: A solution is made by mixing an x amount of concentrate with water. Approximately how many liters(x) of this concentrate should be mixed with 5 liters of water so that 32 percent of the solution is concentrate?
A) 0.68
B) 1.6
C) 2.28
D) 2.35
Click here to see answer by stanbon(75887)

Question 1042826: The volume of a mixture of sand, gravel, and cement are in the ratio of 2 to 1 to 3. If 1 cubic foot of each item weighs 30, 40, and 20 pound respectively, what is the ratio of the weights of sand to gravel to cement in this mixture?
A) 3:1:2
B) 3:2:3
C) 2:1:3
D) 3:1:3
Click here to see answer by stanbon(75887)

Question 1042928: Simplify:
Click here to see answer by ikleyn(52831)

Question 1042928: Simplify:
Click here to see answer by jim_thompson5910(35256)

Question 1042927: What value of x will satisfy this equation
Click here to see answer by ikleyn(52831)

Question 1042927: What value of x will satisfy this equation
Click here to see answer by jim_thompson5910(35256)

Question 1042934: If and , then a is how much larger than x?
A) 1/48
B) 1/16
C) 3/16
D) 15/16
Click here to see answer by jim_thompson5910(35256)

Question 1042931: The small, wealthy town of Luxuria has a school population of 900 children Of the 175 children in elementary school, 100 children receive an allowance. What is the probability that a randomly chosen student who attends the elementary school receives an allowance?
Click here to see answer by stanbon(75887)

Question 1043046: IF 0 ≤ x ≤ 4 and -4 ≤ y ≤ 5, what is the smallest possible value for 16/(|x-y|)?
Click here to see answer by ikleyn(52831)

Question 1043045: Abbie has 3 more apps on her phone than Kishan and Rayen has one more app than Abbie. If the combined number of apps that the three of them have is greater than 70 but less than 76, how many apps does Kishan have?
Click here to see answer by ikleyn(52831)

Question 1043044: Last month, 38,860 residents of Lakewood County and 46,204 residents of Rockland County voted on Referendum A. From the two counties, a total of 63,798 residents voted yes. If the same percentage of voters in each county voted yes, how many of the residents of Lakewood County voted yes?
A) 17594 B) 24,938 C) 29,145 D) 34,653
Click here to see answer by josmiceli(19441)

Question 1043068: 30-5*6+5-4*3

Click here to see answer by josgarithmetic(39623)

Question 1043133: Suppose a line segment has endpoints A(2.5) and B(x,y). If the midpoint of this segment, M, has coordinates of (x+A, y-2A), what are the coordinates of B?
A) (7,1/3)
B) (4,3)
C) (1/2,8)
D) (-3,5)
Click here to see answer by ikleyn(52831)

Question 1043166: What shall be added to x^2-6x to complete the square
Hence, solve x^2-6x+7=0
So the first one is 9. x^2-6x+9=-7+9.Then I'm stuck!
Click here to see answer by josgarithmetic(39623)

Question 1043165: A(-2,1) B(4,4) O (0,0)
AOBE is a parallelogram. Find the co-ordinates of E.
The gradients are the same, right?
Click here to see answer by Fombitz(32388)

Question 1043165: A(-2,1) B(4,4) O (0,0)
AOBE is a parallelogram. Find the co-ordinates of E.
The gradients are the same, right?
Click here to see answer by Edwin McCravy(20060)

Question 1043140: If a,b, and c are three integers where b=a+5 and c=b-1, then what is the result when the average of the three numbers is subtracted from the median?
A) 2
B) 1
C) 0
D) -1
Click here to see answer by robertb(5830)

Question 1043204: If , what is the value of
Click here to see answer by ikleyn(52831)

Question 1043203: If x+y=12 and x-y=4, what is the value of

Click here to see answer by ikleyn(52831)

Question 1043213: In the equation above, a and b are constants. If . what is the value of a?
Click here to see answer by stanbon(75887)

Question 1043213: In the equation above, a and b are constants. If . what is the value of a?
Click here to see answer by ikleyn(52831)

Question 1043212: If 4x-y=2/3, what is the value of
Click here to see answer by ankor@dixie-net.com(22740)

Question 1043294: If x^12=5000 and (x^11)/y=10, what is the value of xy?
Click here to see answer by stanbon(75887)

Question 1043297:
The relationship between the temperature F,in degrees Fahrenheit,and the temperature C,in degrees Celsius, is given by the formula above. A student uses the approximate formula F=2C +30 to convert from degrees Celsius to degrees Fahrenheit. For what temperature in degrees Celsius does the student's approximate formula give the correct temperature in degrees Fahrenheit?
A) 0
B) 5
C) 10
D) 15
Click here to see answer by stanbon(75887)

Question 1043302: x^2-x+1=0. Solve for x. Do I use quadratic eqn?
Click here to see answer by ikleyn(52831)

Question 1043303: 8^(2x-1) = 4sqr8
Much help appreciated!
Click here to see answer by stanbon(75887)

Question 1043309:
In the euation above, a and b are constants. If the equation is true for all positive values of x, what is the value of b?
A) -1
B) 1
C) 2
D) 4
Click here to see answer by josgarithmetic(39623)

Question 1043306: (x+y)^2-(x-y)^2=72
In the equation above, x and y are positive integers. Which of the following CANNOT be the value of x+y?
A) 9
B) 11
C) 19
D) 24
Click here to see answer by josgarithmetic(39623)

Question 1043307: If and xy=5, what is the value of ?
A) 5
B) 75
C) 80
D) 3
Click here to see answer by ikleyn(52831)

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, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840