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
blagie [28]
3 years ago
9

Is (4,-3) a solution to this system? 3x-3y=21 5x+4y=24

Mathematics
2 answers:
Elena-2011 [213]3 years ago
8 0

Welcome to Brainly!

We have the following system of linear equations:

3x-3y=21

5x+4y=24

We could solve this system through elimination: Multiply the first equation by 5 and the second equation by -3. When you add together the results, x will drop out. This is a great approach.

But you could take a short cut by subst. the coordinates (4,-3) into both of the given linear equations. IF both equations are true after this substitution, then you know that (4,-3) is a solution. Let's try it:

3(4) - 3(-3) = 21 => 12 + 9 = 21. This is true. But we must ALSO check whether (4,-3) satisfies 5x+4y=24: 5(4) + 4(-3) = 24 => 20 - 12 = 12. This is NOT equal to 24, so we must conclude that (4,-3) is NOT a solution of this system of linear equations.


Arturiano [62]3 years ago
7 0
No it is not. although it fits the first equation, it doesn’t fit the second.
You might be interested in
Using a six-sided die, you have rolled a 6 on each of four successive tosses. What is the probability of rolling a 6 on the next
ollegr [7]

Answer:

The probability of rolling a 6 on the next toss = 1/6

Step-by-step explanation:

Given - Using a six-sided die, you have rolled a 6 on each of four successive tosses.

To find - What is the probability of rolling a 6 on the next toss?

Proof -

As the outcomes of previous rolls do not affect the outcomes of future rolls.

And there is one desired outcome and six possible outcomes.

So,

The probability of rolling a six on the fifth roll = 1/6 which is same as the probability of rolling a six on any given individual roll.

So,

The answer is -

The probability of rolling a 6 on the next toss = 1/6

8 0
3 years ago
A TV is on sale at 30% off for $420. What was the original price of the TV?
liberstina [14]
<span>"A TV is on sale at 30% off for $420"
 
What was the original price of the TV?
</span>

Well if you start to calculate first off you are sooner or later going to figure out that in order for it to be 420 the answer has to be bigger than 1,000. If you get to 1,200 and calculate 30 percent off of it it the answer is 360 so a ballpark quesstiminate would be to go two more hundredths up. Therefore 30 percent of 1,400 is 420
4 0
3 years ago
If b equals 4 and = 7 what is ad
Elodia [21]

Answer:

3

Step-by-step explanation:

I gussed but I'm not sure

3 0
3 years ago
How can i solve that equation by factoring
Hoochie [10]

Answer:

y = ( x + 3 )( x + 5 )

Step-by-step explanation:

N/A

5 0
3 years ago
Read 2 more answers
3x+2y+4+9y=<br> Plz answer
fomenos
<span>3x+2y+4+9y=


Combine like terms:
2y+9y=11y


I believe the answer is 3x+11y+4

(That is unless you know the numbers that y & x equals)</span>
5 0
3 years ago
Other questions:
  • 39.6 x 5.20 show your work traditional method
    15·1 answer
  • 2 step equations that equal 18
    13·1 answer
  • The order of several matrices are given.
    8·1 answer
  • Factor completly 6c + 24
    6·2 answers
  • Determine perimeter
    7·2 answers
  • First five multiples of 15
    12·2 answers
  • You carry a 20 N bag of dog food up a 6 m flight stairs how much work was done?
    14·1 answer
  • FABRIC You can spend at most $60 on lace. Cotton lace is $2 per yard and linen lace is $3 per yard. Write an inequality for the
    12·1 answer
  • Find the scale factor that was used to change
    13·2 answers
  • Zara translates figure p to make figure q. If she translates figure q 4 units to right to make figure r where will figure r be l
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!