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
masha68 [24]
3 years ago
5

When Raphael solved the system below by using the method of elimination, he changed the second equation to -8x-2y=-2 what proper

ty justifies this manipulation?
8x+3y=7
4x+y=1
Mathematics
1 answer:
galben [10]3 years ago
4 0
For this case, what we are going to do is use the following property:
 Multiply an equation by a scalar.
 In this case, the scalar will be:
 k = -2
 We have then that equation 2 will be:
 k * (4x + y) = k * 1
 -2 * (4x + y) = - 2 * 1
 -8x-2y = -2
 Answer:
 The property that justifies this manipulation is:
 Multiply an equation by a scalar.
You might be interested in
Tickets to a school production cost $5 for a student ticket and $10 for an adult ticket. A total of 67 tickets were purchased at
vazorg [7]

Answer:

Step-by-step explanation:

Keywords:

System of equations, variables, cost, tickets, adults, children.

For this case we must solve a system of equations with two variables represented by the tickets of students and adults of a school production.

We define the variables according to the given table:

a: Number of tickets sold to adults

c: Amount of tickets sold to children.

We then have the following system of equations:

A + c = 67

10a + 5c =440

From the first equation, we clear the value of the variable c:

C = 67 - a

Answer:

The value that could replace c in the table is:

C = 67 - a

Option C is the answer!

Hope it helped u if yes mark me BRAINLIEST!

Tysm! Plz

9 0
3 years ago
Read 2 more answers
2 3/4+1 1/5 i need this for math, im kinda stupid, please dont anwser if you dont know its for a test XD
Oksi-84 [34.3K]

Answer:

3  19/20

Step-by-step explanation:

So...

The first step is to find a common denominator between the 2. The smallest common denominator is 20. So you would do 3/4 times 5/5 which is 15/20. (2 15/20)

1/5 times 4/4 = 4/20(1 4/20)

So the final step is to add them together

2 15/20 + 1 4/20= 3 19/20.

This is the most simplified answer you can get.

5 0
2 years ago
Willie is selling coupon books to raise
Anarel [89]

Answer:

  • {0, 11, 22, 33, 44, 55, 66, 77, 88, 99, 110}

Step-by-step explanation:

<u>The relationship is:</u>

  • y = 11x

y - is the money received for the coupons, x- is the number of coupons

<u>x is the domain and it includes whole numbers from 0 to 11:</u>

  • x = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

<u>y is the range and it includes the set of numbers:</u>

  • y = {0, 11, 22, 33, 44, 55, 66, 77, 88, 99, 110}
7 0
2 years ago
What number is 73% of 125
Setler [38]

Answer:

91.25

Step-by-step explanation:

73%=73/100

Then,

73/100*125=91.25

7 0
3 years ago
Im bore ddd wanna talk me h jjm​
ahrayia [7]

Answer:

Sure

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • Help i need help il give 5 pt
    7·1 answer
  • your family goes to a southern -style restaurant for dinner. there are 6 people in your family .some order the chicken dinner fo
    5·1 answer
  • Antar is flying a triangular-shaped kite. it has a height of 4 1/2 feet and a base of 5 3/4 feet. what is the area of Antar's ki
    11·1 answer
  • Hypothesis testing is an example of what type of statistics?
    12·1 answer
  • Sue graphed the formula for converting temperatures from Fahrenheit to Celsius.
    8·1 answer
  • Divide.<br> (2x^3 - 5x^2 + 7) / (x-2)
    11·1 answer
  • The world’s population is currently estimated at 7,125,000,000. What is this to the nearest billion? billion
    14·2 answers
  • Question below. Please answer it, its math.
    11·1 answer
  • It's this one!!!!_;$;;#+$;​
    11·1 answer
  • My question is to write 32 in the form 2n
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!