A community for students.
Here's the question you clicked on:
 0 viewing
kitsune0724
 2 years ago
Simplify:
1/(7x)1/(5x)
and
Find a solution: 1/9x+1/10=11/90
please and thank you.
kitsune0724
 2 years ago
Simplify: 1/(7x)1/(5x) and Find a solution: 1/9x+1/10=11/90 please and thank you.

This Question is Closed

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{1}{7x}\frac{1}{5x}\]Find a common denominator, then combine. Do you know how to do that?

kitsune0724
 2 years ago
Best ResponseYou've already chosen the best response.0I think so. Thank you.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0For the other one, the same approach is appropriate. Find a common denominator, or multiply the whole equation by the product of all of the denominators.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0There better be an x in there somewhere, don't you think?

kitsune0724
 2 years ago
Best ResponseYou've already chosen the best response.0Yes there is. Thank you again.

some_someone
 2 years ago
Best ResponseYou've already chosen the best response.1(1)/(7x)(1)/(5x) To add fractions, the denominators must be equal. The denominators can be made equal by finding the least common denominator (LCD). In this case, the LCD is 35x. Next, multiply each fraction by a factor of 1 that will create the LCD in each of the fractions. (1)/(7x)*(5)/(5)(1)/(5x)*(7)/(7) Multiply 1 by 5 to get 5. (5)/(5*7x)(1)/(5x)*(7)/(7) Multiply 7x by 5 to get 35x. (5)/(35x)(1)/(5x)*(7)/(7) Multiply 1 by 7 to get 7. (5)/(35x)(7)/(7*5x) Multiply 5x by 7 to get 35x. (5)/(35x)(7)/(35x) Combine the numerators of all expressions that have common denominators. (57)/(35x) Subtract 7 from 5 to get 2. (2)/(35x) Move the minus sign from the numerator to the front of the expression. 2/35x

some_someone
 2 years ago
Best ResponseYou've already chosen the best response.1(1)/(9)*x+(1)/(10)=(11)/(90) Multiply 1 by x to get x. (x)/(9)+(1)/(10)=(11)/(90) Since (1)/(10) does not contain the variable to solve for, move it to the righthand side of the equation by subtracting (1)/(10) from both sides. (x)/(9)=(1)/(10)+(11)/(90) To add fractions, the denominators must be equal. The denominators can be made equal by finding the least common denominator (LCD). In this case, the LCD is 90. Next, multiply each fraction by a factor of 1 that will create the LCD in each of the fractions. (x)/(9)=(11)/(90)(1)/(10)*(9)/(9) Multiply 1 by 9 to get 9. (x)/(9)=(11)/(90)(9)/(9*10) Multiply 10 by 9 to get 90. (x)/(9)=(11)/(90)(9)/(90) Combine the numerators of all fractions that have common denominators. (x)/(9)=(119)/(90) Subtract 9 from 11 to get 2. (x)/(9)=(2)/(90) Cancel the common factor of 2 the expression (2)/(90). (x)/(9)=(<X>2<x>)/(45<X>90<x>) Remove the common factors that were cancelled out. (x)/(9)=(1)/(45) Multiply each term in the equation by 9. (x)/(9)*9=(1)/(45)*9 Cancel the common factor of 9 in the denominator of the first term (x)/(9) and the second term 9. (x)/(<X>9<x>)*<X>9<x>=(1)/(45)*9 Reduce the expression by removing the common factor of 9 in the denominator of the first term (x)/(9) and the second term 9. x*1=(1)/(45)*9 Multiply x by 1 to get x. x=(1)/(45)*9 Cancel the common factor of 9 in the denominator of the first term (1)/(45) and the second term 9. x=(1)/(5<X>45<x>)*<X>9<x> Reduce the expression by removing the common factor of 9 in the denominator of the first term (1)/(45) and the second term 9. x=(1)/(5)*1 Multiply 1 by 1 to get 1. x=(1)/(5)

kitsune0724
 2 years ago
Best ResponseYou've already chosen the best response.0can you please draw it for me? Thank you.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0Is the problem \[\frac{1}{9x} + ... \] or \[\frac{1}{9}x + ...\]?

kitsune0724
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1359439362873:dw this is the problem.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{1}{9}x + \frac{1}{10} = \frac{11}{90}\] Okay, what should we use as a common denominator?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0As 9 and 10 are both factors of 90, I'll take 90 as the common denominator. I'll multiply the first term by 10/10, the second term by 9/9. \[\frac{10}{10}*\frac{1}{9}x + \frac{9}{9}*\frac{1}{10} = \frac{11}{90}\] \[\frac{10x}{90} + \frac{9}{90} = \frac{11}{90}\]Now subtract 9/90 from both sides and solve for x.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0Alternatively, I would have multiplied everything by 90 to eliminate the fractions from the outset, but it's good to get some practice working with fractions!

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{10x}{90} + \frac{9}{90}  \frac{9}{90} = \frac{11}{90}  \frac{9}{90}\] \[\frac{10x}{90} = \frac{119}{90}\]

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{10x}{90} = \frac{119}{90} = \frac{2}{90}\]Okay, what does x equal?
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.