math
posted by larry .
please check and see if my answers are correct if not let me know so i can redo these and find where i messed up
1. divid by moving the decimal point
27.3 dived 10^5
my answer .000273
2.Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. What fraction of his study time remains?
my answer was 13/21
3.find the least common multiple of 10,15,25.
my answer was 150
4. Kristi jogged for 3/5 of an hour, swam for 1/2 of an hour, and rode her bicycle for 3/4 of an hour. How long did she exercise?
my answer 1 17/20
5. add 8/25+3/20
my answer 47/100
#2
2/7=6/21
1/3=7/21
6/21 + 7/21=13/21
21/21  13/21=8/21
otherwise it looks ok

I am still not understanding how you arrived at number 2

Find the fivenumber summary of the following set of numbers.
0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27 
Write in decimal form.94 17/ 1,000

Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. What fraction of his study time remains?
You need to find the LCM (21) that will give you 7/21 and 6/21. "REMAINS" indicates that you will subtract so 7/21  6/21 = 1/21.
Hope that helped. 
ulzi cwfrj jmoblcux kubzt tjvhb ylinqk pzxltej
Respond to this Question
Similar Questions

Math
Can someone correct them 5) Write fraction as a percent 7/8 My answer: 0.875=87 1/2% 6)Write each decmal as a percent 0.008 My answer:8% 7) Write as a decimal 160% My answer:1.60 8)Write as a fraction 52% My asnwer:5/10 5) Write fraction … 
math,correction
can someone correct these for me i'll appreciate it thank. dirctions: solve 3x7=2x+8 my answer: x = 15 directions: solve 2/5x=10 my answer: x = 25 Directions: solve 3(x+1)=2(x8)+3 my answer: x= 3.2 1 looks ok. Show your work … 
math
can someone check my answers please subtract 7.1(8.3)= 1.2 multiply (7.6)(1)(6) = 45.6 divid 90/18 = 5 find the reciprocal of 1/3 (94= 5/3 15(12)  18(18) undefined 
Math
I have three math problems that I have tried to solve but I do not think they are correct. Can someone please help me! 1. What is the product of 225 and 507? 
Math 8R: Homework Check  Part 2
Part 2: Simplify by combining like terms and using the distributive property 11. 3x + 5x Answer: 8x 12. 3x + 5y  2x + 8, Answer: 1x + 5y + 8 13. 9 + 5m + 6b  2m  4, Answer: 3m + 5 + 6b 14. 3ab + 6c  ab + 10  2c, Answer: 2ab + … 
Math 8R: Homework Check  Part 3
Part 3 : Evaluate when x = 2, y = 5 21. 4x + 2y, Answer: 2 22. 3(x) *to the 3rd power*, Answer: 221 23. (x + y) *to the 2nd power*, Answer: 9 24. 4x + 2y, Answer: 18 Please check to see if my answers are correct. Thank You!!! :) 
Math check
Consider the binomial random variable x with n = 30 and p = 0.85. (a) Find the mean. (Give your answer correct to one decimal place.) 25.5 . (b) Find the standard deviation. (Give your answer correct to two decimal places.) 30.85 
Math check and question
x is a binomial random variable. (Give your answers correct to three decimal places.) (a) Calculate the probability of x for: n = 1, x = 0, p = 0.15 P(x) = Correct: Your answer is correct. . (0.85) (b) Calculate the probability of … 
math check
A machine produces parts with lengths that are normally distributed with ó = 0.52. A sample of 16 parts has a mean length of 75.07. (a) Give a point estimate for ì. (Give your answer correct to two decimal places.) 75.07. (b) Find … 
statistics check
Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) 5.35 was my answer . (c) Calculate sx and …