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
4vir4ik [10]
3 years ago
14

What is the best first step for solving the given system using substitution while avoiding fractions? =9x+4x=10 -9x+3y=3

Mathematics
2 answers:
padilas [110]3 years ago
4 0

Answer:

Solve for y in the second equation

D is correct

Step-by-step explanation:

Given: 9x+4y=10 and -9x+3y=3 system of equation.

We are given system of equation in x and y form of straight line.

We need to solve for x and y without using fraction.

We will choose those equation  has common factor.

If we pick first equation coefficients are 9,4 and 10.

Here, no any common factor.

Now we pick second equation.

-9x+3y=3

Common factors of coefficients are 3

If we divide each term by 3 we will get coefficient of y be 1 and rest are not in fraction.

So, we will pick second equation and solve for y.

-9x + 3y = 3

Divide by 3 both sides to each term

-3x + y = 1

Add 3x both sides

y = 3x + 1

So, we get y = 3x + 1 . In this equation none is fraction term.

aivan3 [116]3 years ago
3 0

Answer:

  Solve for y in the second equation

Step-by-step explanation:

We assume your system is ...

  • -9x +4y = 10
  • -9x +3y = 3

Dividing <em>the </em><em>second equation</em> by 3 gives ...

  -3x +y = 1

so an expression for y without fractions can be found by <em>solving for y</em>, that is, by adding 3x:

  y = 3x +1

_____

<em>Comment on alternate solution</em>

We'd be tempted to solve the first equation for -9x and substitute for that.

  -9x = 10 -4y

  (10 -4y) +3y = 3 . . . . . substitute for -9x

  -y = -7 . . . . . . . . . . . . . simplify, subtract 10

  y = 7 . . . . . . . . . . . . . . multiply by -1

You might be interested in
My grades is they good or bad on your opinion
Oxana [17]

Good!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

6 0
3 years ago
36 kg bag of cement was dropped losing one tenth of cement. How much was left in the bag of cement ?
kow [346]

Answer:

32.4kg

Step-by-step explanation:

if it loses one tenth of cement;

36kg×1/10

36kg/10

3.6kg was lost

to find the remaining ; 36kg - 3.6kg = 32.4kg is left in the bag

7 0
3 years ago
Read 2 more answers
Find Each Difference.<br> 1) 2-(-2)=<br> 2) (-1)-10=<br> 3) 8-7=<br> 4) (-8)-(-6)
Afina-wow [57]

Answer:

1) 4

2) -11

3) 1

4) -2

Step-by-step explanation:

5 0
3 years ago
What is the sum of 5/12 and 1/3. Write the answer in simplest form
beks73 [17]

Answer:

Step-by-step explanation:\frac{5}{12}

8 0
3 years ago
Select the statement that best describes each multiplication problem 
Naily [24]

Answer:

1. Perfect Square

2. Perfect Square

3. Conjugate

4. Conjugate

5. Perfect Square

-I am about 98% sure about these answers.

-An example for a perfect square is (5x+3)(5x+3) and an example for a conjugate is (5x+3)(5x-3). The only difference between the two is the symbol for the second pair of parenthesis.

7 0
3 years ago
Other questions:
  • Help me please thank you
    10·1 answer
  • Which equation represents this proportional relationship
    11·1 answer
  • if the ratio of home fans to visiting fans is 5:2 and all 42000 seats in a stadium are filled, how many visiting fans are in att
    11·1 answer
  • Question 4 of 25
    12·1 answer
  • Find the greatest common divisor of 63 and 42
    11·1 answer
  • Graph the following {(x,y): x + y = 5}
    7·1 answer
  • Prove that a positive integer $n \geq 2$ is prime if and only if there is no positive integer greater than $1$ and less than or
    11·1 answer
  • Can someone please help me with this?
    15·1 answer
  • Find the prime factorization of 969
    6·1 answer
  • I need help asap<br> I cannot figure this out
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!