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
Anestetic [448]
3 years ago
15

Four times one number minus three times another number is 12. Two times the first number added to three times to the second numb

er is 6. Find the numbers. Write equations and solve the system using elimination
Mathematics
1 answer:
SVETLANKA909090 [29]3 years ago
4 0

Answer:

Step-by-step explanation:

x = first number, y = second number

4x - 3y = 12

2x + 3y = 6

------------------add

6x = 18

x = 18/6

x = 3

4x - 3y = 12

4(3) - 3y = 12

12 - 3y = 12

-3y = 12 - 12

-3y = 0

y = 0

solution : (3,0)

You might be interested in
A large on-demand video streaming company is designing a large-scale survey to determine the mean amount of time corporate execu
Diano4ka-milaya [45]

Answer:

n=(\frac{2.262(3)}{0.25})^2 =736.79 \approx 737

So the answer for this case would be n=737 rounded up to the nearest integer

Step-by-step explanation:

We have the following info given:

\bar X = 12 the sample mean

s = 3 the sample deviation

n = 10 represent the sample size

The degrees of freedom are given by:

df =n-1 =10-1=9

The margin of error is given by this formula:

ME=t_{\alpha/2}\frac{s}{\sqrt{n}}    (a)

And on this case we have that ME =0.25 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{t_{\alpha/2} s}{ME})^2   (5)

The confidence level is 95% and the critical value for this case would be given by t_{\alpha/2}=2.262, replacing into formula (5) we got:

n=(\frac{2.262(3)}{0.25})^2 =736.79 \approx 737

So the answer for this case would be n=737 rounded up to the nearest integer

7 0
3 years ago
5 divided by what equals 9
Effectus [21]
5 divided by 45 equals 9
3 0
3 years ago
Read 2 more answers
72A company bought 96 gallon jars of honey for a total of $3,072. They repackaged it into 8-ounce bottles. a. How many bottles c
Travka [436]
9 bottles will be filled to the top you’re welcome.
8 0
1 year ago
Michael's bike uses 3 litres of fuel for
gavmur [86]
ANSWER:
$18.90

EXPLANATION:
3L of fuel for every 100km

450km = 13.5L

13.5 x 1.40 = $18.90
7 0
1 year ago
Given the equation 2^2-^1=8^x-1 what is the value of x
Lady bird [3.3K]

Answer:

i can't solve it because it's not complete

you need something 2^2 (right here) -^1=8^x-1

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • Find the total cost for $1500 and a 7% tax
    15·1 answer
  • Geometry. Please help! (will mark brainliest)
    9·2 answers
  • What is -1/2(-1) put in to a fravtion
    8·1 answer
  • A countertop is 16 feet long and 3 feet wide . what is the area of the countertop in square meters?
    13·2 answers
  • I need help with this question, with work please<br> ANSWER ASAP!!!!!!!!!!!!!!!!!!!!
    7·2 answers
  • Please help with 2 quick questions?
    9·1 answer
  • Make x the subject of the equation: y=ax^2
    6·1 answer
  • You are having a pizza making party. You will need 6 ounces of dough and 4 ounces of sauce for each person at the party(includin
    6·1 answer
  • When 0.5(20x – 50y + 36) – 0.25(–100x + 40y – 12) is simplified, what is the resulting expression?
    14·1 answer
  • -4x -2 + 3x - 10 How many terms are there? SIMPLIFY. What is the coefficient of x?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!