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
slega [8]
3 years ago
12

to eliminate the y-terms and solve for x in the fewest steps, by which constants should the equations be multiplied? first equat

ion: 5x − 4y = 28 second equation: 3x - 9y = 30 the first equation should be multiplied by 3 and the second equation by 5. the first equation should be multiplied by 3 and the second equation by −5. the first equation should be multiplied by 9 and the second equation by 4. the first equation should be multiplied by 9 and the second equation by −4.
Mathematics
2 answers:
Mazyrski [523]3 years ago
8 0

Answer: The first equation should be multiplied by 9 and the second equation by −4, to eliminate the y-terms and solve for x in the fewest steps.


Step-by-step explanation:

Given : Equation (1) 5x − 4y = 28

Equation (2) 3x - 9y = 30

to eliminate the y-terms and solve for x in the fewest steps, we should multiply  equation (1) by 9 and equation (2) by -4 such that

9(5x − 4y) =9 (28)⇒45x-36y=252

-4(3x - 9y) = -4(30)⇒ -12x+36y= -120

Now adding both equations, y-term eliminated and we get, 45x-12x=132

⇒33x=132⇒x=4.

Svet_ta [14]3 years ago
7 0
5x - 4y = 28
3x - 9y = 30

to eliminate y : multiply first equation by 9 and second equation by -4
You might be interested in
What is the range of this exponential function? <br> f(x) = 2.7x
Anton [14]

The range of the exponential function f(x) = 2.7ˣ will be from zero to infinity that is (0, ∞).

<h3>What are domain and range?</h3>

The domain means all the possible values of x and the range means all the possible values of y.

The exponential function is given below.

f(x) = 2.7ˣ

We know the value of the exponential function is always positive.

Then the range of the exponential function f(x) = 2.7ˣ will be from zero to infinity that is (0, ∞).

More about the domain and range link is given below.

brainly.com/question/12208715

#SPJ1

7 0
2 years ago
The sum of two consecutive integers is 157. Find the smallest integer.
omeli [17]

Answer:

Hi there!

Your answer is:

The smallest integer is equal to 78

Step-by-step explanation:

x, x+1

x+x+1 = 157

2x+1 = 157

-1

2x= 156

/2

x= 78

The numbers are:

Smallast integer: 78

Larger integer: 78+1 = 79

8 0
3 years ago
A ball is thrown into the air with an upward velocity of 28 ft/s. its height,h, in feet after t seconds is given by the function
ddd [48]

<span>h= (-16t^2 + 28t + 7)  </span>

find the derivative to get time<span>
<span>
h' = (-32t + 28)

When the ball reaches its maximum height, its vertical velocity (h’) will be 0 </span></span>

<span>
<span> 0 = -32t + 28 </span></span>

-32t=-28

<span><span>-28/-32 =  </span>0.875 seconds </span><span>
<span>
The ball reaches its maximum height in 0.875 seconds after being thrown; plug and chug and:

h= (-16(0.875)^2 + 28(0.875) + 7) = 19.25 feet</span></span>

 

Max height = 19.25 feet, time = 0.88 seconds


8 0
3 years ago
Which statement regarding the diagram is true?
Sergeu [11.5K]
Answer

<span>m∠WXY + m∠YXZ = 180°</span>
7 0
4 years ago
Read 2 more answers
louise skip counts by 4 on a number line to find 5×4.How many jumps should she draw on the number line?
Vadim26 [7]
She should have 5 hops
7 0
3 years ago
Read 2 more answers
Other questions:
  • I need help on question number 12. Can anybody help me? It's very urgent
    14·1 answer
  • What is the value of x?​
    9·2 answers
  • If a person is randomly selected, find the probability that his or her birthday is not in may.
    15·1 answer
  • I need help pls help me!!
    13·2 answers
  • The model represents an equation. What value of x makes the equation true?
    12·2 answers
  • If you solve the inequality X-2 &gt; 1, the solution set is x &gt; 3. Graph x &gt; 3 on a number line. Which one of the listed v
    12·2 answers
  • Apply the appropriate mathematical operation to solve this fulcrum problem.
    10·1 answer
  • Someone help please
    7·1 answer
  • -77.4=9a<br> I need to solve for a. Can someone help me?
    11·1 answer
  • Put some coordinates on a graph and work it out pls worth 10pts
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!