Tutors Answer Your Questions about Equations (FREE)
Question 858689: 1. If 5 times the value of a number is increased by 3, the result is 28. What is the number?
2. If 4 times the reciprocal of a number is 3 more than 5/2 times the reciprocal of that number, find the number.
3. John had $30,000 to invest. He invested part of this money in bonds paying 12% annual simple interest and the rest of the money in a savings account giving 4% annual interest. At the end of the year, he received $2,400 as extra income. How much money did John place in each investment?
4. The length of a football field is 180 feet more than its width. If the perimeter of the field is 1,060 feet, find the length of the field.
5. At a school choir concert, 256 students are standing in rows. If the number of students in each row is equal to the total number of rows, find the number of students in each row.
6. If 6 times a number is decreased by 8, the result is 40. What is the number?
7. Merry had $20,000 to invest. She invested part of this money in bonds paying 10% annual simple interest and the rest of the money in a savings account giving 5% annual interest. At the end of the year, she received $1,800 as extra income. How much money did Merry place in the savings account?
8. The length of a rectangular field is 50 feet less than its width. If the perimeter of the field is 840 feet, find the length of the field.
9. Alan participated in a car race in which he had to cover a distance of at least 50 kilometers. He had fuel in his car for a maximum distance of 53 kilometers. If the distance is given by , S(T)= 3T+ 47 where t is the time in hours, find the minimum and maximum number of hours for which Alan can drive his car.
10.In a 2-digit number, the number in the unit’s place is 4 more than the number in the ten’s place. If the digits of the number are reversed, the new number is 6 more than thrice the original number. Find the original number.
Click here to see answer by psbhowmick(878)   |
Question 858967: Please help me solve this equation:
2/5 + x = -3/5
I am hoping I did it correctly. The answer I came up with is -1. I have to write out the problems to show my work. So it's hard for me to show my work on here.
Click here to see answer by Alan3354(69443)  |
Question 859227: Jill travels to work in one hour and 30 minutes. Jane travels to work in one hour and 20 minutes Jane drives 5 mph faster to work and Jill. They both had the same distance to work. How far do they both drive to work?
Click here to see answer by ewatrrr(24785)  |
Question 859429: Hi, can you please tell me if my answer is correct?
Thank you so much for your help in advanced! (I apologise if I have chosen the wrong topic for this question!)
The questions states, "Transpose the formula F = 6.67 x 10^-11 m1m2/r2 to make m1 the subject." My answer is m1 = m2 (6.67 x 10^-11)/r2. Is this correct? Or should it be something like m1 = m2/r2 (6.67 x 10^-11)?
Click here to see answer by Fombitz(32388)  |
Question 859660: Solve the problem as an equation.
You must show the addition/subtraction/division steps on both sides of the equation to receive full credit. You must show your work alegraically.
Kevin invested money in a savings account at a rate of 5% simple interest. After one year, he has $4032.00 in the account. How much did Kevin originally invest?
Click here to see answer by mananth(16946)  |
Question 859869: Which of the following equations have the same solution? Solve all three equations separately and explain each step.
I. 4x – 14 = 2x + 8
II. 3x – 21 = 12
III. x-2/5=4x+2/25
I just need help on the third equation the first two both equal 11
Click here to see answer by ewatrrr(24785) |
Question 860644: Loudon County Phone Company charges a $100 activation fee plus a monthly fee of $0.05 per minute for every minute over 200 minutes each month. (So, there is no monthly charge for 0 – 200 minutes of use per month).
(a) Write an equation that can be used to determine a new subscriber’s first month’s phone bill, B(x), given the amount of minutes called, x. (Assume that the subscriber will make over 200 minutes of calls)
(b) Determine the subscriber’s first month’s bill if the total minutes used was 650. Show work.
(c) Determine the number of minutes used if the new subscriber’s first month bill was $114. Show work.
Click here to see answer by ewatrrr(24785) |
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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, 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