1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hammer [34]
3 years ago
11

A/20 + 14/15 = 9/15 Can i get some help?

Mathematics
1 answer:
KiRa [710]3 years ago
3 0
Method 1:

\dfrac{a}{20}+\dfrac{14}{15}=\dfrac{9}{15}\ \ \ \ |multiply\ both\ sides\ by\ 60\\\\60\cdot\dfrac{a}{20}+60\cdot\dfrac{14}{15}=60\cdot\dfrac{9}{15}\\\\3a+4\cdot14=4\cdot9\\\\3a+56=36\ \ \ \ |subtract\ 56\ from\ both\ sides\\\\3a=-20\ \ \ \ |divide\ both\ sides\ by\ 3\\\\\boxed{a=-\frac{20}{3}\to a=-6\frac{2}{3}}

Method 2.

\dfrac{a}{20}+\dfrac{14}{15}=\dfrac{9}{15}\ \ \ \ |subtract\ \dfrac{14}{15}\ form\ both\ sides\\\\\dfrac{a}{20}=-\dfrac{5}{15}\\\\\dfrac{a}{20}=-\dfrac{1}{3}\ \ \ \ |multiply\ both\ sides\ by\ 20\\\\\boxed{a=-\dfrac{20}{3}\to a=-6\frac{2}{3}}
You might be interested in
The set of whole numbers is not a subset OF--
Andrews [41]
I’m pretty sure it’s b
5 0
3 years ago
Read 2 more answers
Lost all factor pairs of 50
Genrish500 [490]

Answer:

(5, 10 ) ( 2, 25 )

Step-by-step explanation:

6 0
3 years ago
State which measure of center, or measure of spread, represents the situation. A company finds the difference between the lighte
bearhunter [10]
The difference between the minimum data point and the maximum data point is called the range. This is a measure of spread.
Other measures of spread include the interquartile range/IQR, which helps eliminate outliers, the standard deviation, and the mean absolute deviation. Measures of central tendency include the mean, median & mode.

8 0
3 years ago
I only need 12 13 14
Ulleksa [173]
There isn’t any picture you may have to repost
8 0
2 years ago
Read 2 more answers
I need help...WILL GIVE BRAINLIEST!!!!!!
Snezhnost [94]

Answer:

Step-by-step explanation:

1. 30 degrees (vertical angles)

2. 60 degrees (complementary angles)

3. 150 degrees (supplementary angles and vertical angles)

4. 90 degrees (complementary angles)

6 0
3 years ago
Read 2 more answers
Other questions:
  • The manager of a supermarket would like to determine the amount of time that customers wait in a check-out line. He randomly sel
    13·1 answer
  • The points earned by each choir team during the All-State Competition are as follows: Choir Choir A Choir B Choir C Choir D Poin
    12·2 answers
  • What is the answer 27x^3-1=0
    6·2 answers
  • How many centimeters are in 35 inches? (1 in. = 2.54 cm)
    12·1 answer
  • 4=y-4 solve for the variable
    13·2 answers
  • Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 2010, the concentrati
    13·1 answer
  • malik has 40 cookies. he gave each of his friends 2 cookies and now has 8 left. How many friends does he have?
    11·2 answers
  • 3. Jayne, Carlos, June, and Pedro each measured their dogs' weights, but each used a different measurement. Place the four dogs
    12·1 answer
  • Help me!!!!!!!!! Also, can you tell me how to find the percentage change, i forgot lol
    11·1 answer
  • What is the sum of ∞Σn=1 2(1/5)^n-1? s=1/5 s=2/5 s=5/3 s=5/2
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!