# math

can anyone help me with these 3 problems I am trying to check my daughters hoime work it has bee na few years.

1. The sum of n and twenty -two, multiplied by three, is 78

2. the product of z and 17 is less than or equal to the difference of twenty -one minus z.

3.two increased by eight times a number is equal to the number divided by 5

Ok, we have
(1) (n + 22)*3 = 78. Divide both sides by 3 to get
n + 22=26 now subtract 22 from both sides to get n=4
(2) z*17 <= 21 - z add z to both sides to get
z*17 + z <= 21 or
z*18 <= 21 now divide both sides by 18 to get
z<=21/18 or z <= 7/6
(3) Denote the number by n then
2 + 8n = n/5 multiply both sides by 5 to get
10 + 40n = n now subtract n from both sides and subtract 10 from both sides to get
39n = -10 so n=-10/39

1. 👍 0
2. 👎 0
3. 👁 178

## Similar Questions

1. ### English

I wrote a few other statements I'd like you to check. Thank you very much! 1) First, Mrs Bennet informs her husband that a rich young bachelor, Mr. Bingley, has just rented the nearby estate of Netherfield and is going to take up

asked by Henry2 on December 18, 2011
2. ### English

Sorry, I forgot to change her into his. Was everything correct? Thank you. 1) First, Mrs Bennet informs her husband that a rich young bachelor, Mr. Bingley, has just rented the nearby estate of Netherfield and is going to take up

asked by Henry2 on December 18, 2011
3. ### English

I checked my mistakes. Can you please see if the sentences are possible? 1) First, Mrs Bennet informs her husband that a rich young bachelor, Mr. Bingley, has just rented the nearby estate of Netherfield and is going to take up

asked by Henry2 on December 18, 2011
4. ### English

I hope I checked all the instances of "her" this time. Thank you! 1) First, Mrs Bennet informs her husband that a rich young bachelor, Mr. Bingley, has just rented the nearby estate of Netherfield and is going to take up residence

asked by Henry2 on December 18, 2011
5. ### MATH

Ferdinand walked 1200 feet in 4 minutes. At this rate, how long would it take hoime to walk a mile (5280 feet) ?

asked by Anonymous on September 20, 2013
1. ### English- evaluating essay

I have write a evaluation essay on the movie Troop 1500. So my thesis is -Taking daughters to see their mothers in jail should be a program of it's own.- I don't know if my topic sentence is correct: One reason a program should be

asked by Taylor on February 14, 2012
2. ### English

I have write a evaluation essay on the movie Troop 1500. So my thesis is -Taking daughters to see their mothers in jail should be a program of it's own.- I don't know if my topic sentence is correct: One reason a program should be

asked by Taylor on February 14, 2012
3. ### Ed Tech plz helppppp

What does it mean to troubleshoot your computer? identify problems with your computer and attempt to fix them*** to open your computer to see what's missing from the hard drive to switch the mouse and keyboard plugs to download

asked by Abigail on August 22, 2017
4. ### MATHS

Could you please explain the question below? In the Logan family, each daughterhas the same number of sisters as she has brothers. The daughters, incidentally, are all older than the sons. How many sons and how many daughters in

asked by MILDRED on September 18, 2009
5. ### MATHS

Could you please explain the question below? In the Logan family, each daughterhas the same number of sisters as she has brothers. The daughters, incidentally, are all older than the sons. How many sons and how many daughters in

asked by BRENDON on September 17, 2009

More Similar Questions