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
Yuliya22 [10]
3 years ago
12

Solve this linear equation. Show all workings

Mathematics
2 answers:
user100 [1]3 years ago
5 0

~~~~~~3x^2 +2x -1 = 0\\\\\implies 3x^2 +3x -x -1 = 0\\\\\implies 3x(x+1) - (x+1)=0\\\\\implies (x+1)(3x-1) = 0\\\\\implies x = -1,~~ x = \dfrac 13

Sever21 [200]3 years ago
3 0

Step-by-step explanation:

3x²-3x+x-1=0

3x(x - 1) + 1(x - 1) = 0

(x - 1)(3x + 1) = 0

Either x - 1- = 0, then x = 1

or 3x + 1 = 0, then x = -1 3

x = 1 or -1 3

You might be interested in
Please help will mark brainliest (answer must be right)
const2013 [10]

Answer: TRUE

Step-by-step explanation: This is true, because there is an infinite amount of real numbers in both, and they are both countably infinite (so these infinities are equal). Hope this helps!

8 0
4 years ago
Audreys Candy Store sold 22 individual pounds of jelly beans, one kind at $3.87 per pound and the other at $0.94 per pound. In a
slega [8]

Answer:

  • 3 pounds at $3.87
  • 19 pounds at $0.94

Step-by-step explanation:

Let x represent the number of pounds of high-priced jelly beans sold. Then the total revenue was ...

  3.87x + 0.94(22 -x) = 29.47

  2.93x + 20.68 = 29.47 . . . . . . eliminate parentheses, collect terms

  2.93x = 8.79 . . . . . . . . . . . . . .  subtract 20.68

  x = 3  . . . . . . . . . divide by 2.93

3 pounds of $3.87 jelly beans were sold; 19 pounds of $0.94 jelly beans were sold.

8 0
4 years ago
The sales tax T on an article is equal to the tax rate R times the selling price P of the article
disa [49]

I can't provide the answer. But...I can provide examples.

Hope these help!

https://www.mathstips.com/sales-tax-trade-tax/

5 0
3 years ago
Read 2 more answers
How do you model a decimal using a fraction
stiks02 [169]
Okie dokie, 
When converting a decimal, you use the place the decimal is in...
Let's review the places: tenths, hundredths, thousandths, etc.
You look at the last number to determine what place you're using!
-------------------
Now here's an example for the tenths place:
.5
it's in the tenths place, right? so put it over that number (with no decimal) over a 10.
(mobile) 5/10 or \frac{5}{10}
Now, decide if you can simplify. You can! 5/10 simplifies down to 1/2.
\frac{1}{2} is your answer!
--------
Example for the hundredths place:
.26
the last number is in the hundredths place, so put the number (without a decimal) over 100!
26/100 or \frac{26}{100}
You can simplify this!
13/50 is your answer!

Calculators can also come in handy!
Good luck!

4 0
3 years ago
***Will mark all right answers brainliest*** A certain type of bacteria is being grown on a Petri dish in the school’s biology l
alex41 [277]

Answer:

On day 0 (starting day), the percentage of petri dish occupied by bacteria was 2.44%

Step-by-step explanation:

Rate of growth = 2  (i.e. doubles every day)

Petri dish was filled to 100% on day 12.

Let

P(0) = percentage of Petri dish occupied on day 0, then

equation of percentage a  function of time in x days

P(x) = P(0)*r^x  ......................(1)

where

100% = P(12) = p(0) * 2^12 = 4096 P(0)

=>

P(0) = 100% / 4096 = 0.0244%

Next, to find percentage on February 14 (Valentine's day!)

Day 0 is February 9, so February 14 is the fifth day, so x=5.

Substitute x=5 in equation (1) above,

P(x) = P(0)*r^x  

P(5) = P(0)*2^5

P(5) = 0.0244*2^5 = 0.0244*32 = 0.781%

Ans. the 0.781% of the petri dish was filled with bacteria after 5 days on February 14th.

4 0
4 years ago
Read 2 more answers
Other questions:
  • Evaluate |5 - 15|. please heeeeeeeelp?
    9·1 answer
  • I need help, please help me
    6·1 answer
  • ¡Help please!
    6·1 answer
  • The average annual salary for employees in a store is $50,000. It is given that the population standard deviation is $4,000. Sup
    12·1 answer
  • A number decreased by 23 is 44. Find the number.
    12·2 answers
  • A quadratic function y=f(x)y=f(x) is plotted on a graph and the vertex of the resulting parabola is (5, -6)(5,−6). What is the v
    6·1 answer
  • Can someone please help me
    15·2 answers
  • A square plastic tarp has sides that are 7 meters long. What is the tarps area?
    13·1 answer
  • I CANT FIGURE THIS OUT PLEASE HELP ME FIND angles FAB and BAC
    7·1 answer
  • Please help piecewise function algebra 4 ! Willing to give brainliest and more points !!!!!!!!!!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!