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
Strike441 [17]
3 years ago
6

A: 2x + 8y = 5 B: x + 9y = 10 To solve this system of equations by elimination, what could you multiply equation B by if you wan

t to add the equations together and have a resulting equation with only the y-variable (the x-variable is eliminated)? A) −2 B) 2 C) − 1 2 D) 1 2
Mathematics
1 answer:
Valentin [98]3 years ago
5 0

Answer :A)-2

Step-by-step explanation: If you multiply B; x + 9y =10 by -2 you will      have -2 x+ -18y= -20. Then when you add B with a 2x + 8y = 5

                                                                                      -2x +-18y=-20

                                                                                      =0 +-10y=-15

You might be interested in
Translate the following statement into an algebraic expression: Use x for your variable. The sum of the square of a number and e
dusya [7]

Step-by-step explanation:

Let x be the number.

Then the algebraic expression will be x^2 + 11x.

6 0
3 years ago
Read 2 more answers
The quadratic x^2+7x+20$ has the same roots as the quadratic Ax^2+Bx+1 What is A+B?
sdas [7]

If f(x)=x^2+7x+20 has the same roots as g(x)=Ax^2+Bx+1, then

one must be a multiple of the other.


By comparison of the constant terms, we know that 20g(x)=f(x), or

g(x)=(1/20)f(x)

=(1/20)(x^2+7x+20)

=(1/20)x^2 + (7/20)x + 20/20

=(1/20)x^2 + (7/20)x + 1


Therefore A=(1/20), B=(7/20),  and A+B=(1+7)/20=8/20=2/5

5 0
3 years ago
Which equation represents a line that passes through (2, 1) and has a slope of 3?
AleksAgata [21]

Answer:

y-1=3(x-2)

Step-by-step explanation:

Known:

Point slope form is this: y-y₁=m(x-x₁)

(2,1)

2=x1

1=y1

3=m

y-1=3(x-2)

Hope this helps! Please mark as brainliest :)

7 0
4 years ago
Which is the net force acting on a 1.7-kg object that is accelerating at 5.0 m/s??
Schach [20]

Answer:

A. 8.5 N

Step-by-step explanation: F = 8.5 N

4 0
3 years ago
35) -5(6k + 3) - 8(8-4k) = -73
OLga [1]

Answer:

k = 3

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

  • -5(6k+3)-8(8-4k)=-73
  • -5(6k) + (-5)(3) + (-8)(8) + (-8)(-4k) = -73
  • -30k-15-64+32k=-73
  • (-30k+32k)+(-15-64)=-73
  • 2k-79=-73

Step 2: Add 79 to both sides.

  • 2k - 79 + 79 = -73 + 79
  • 2k = 6

Step 3: Divide both sides by 2.

  • \frac{2k}2} = \frac{6}{2}
  • k = 3
8 0
3 years ago
Other questions:
  • 2. Find the distance between M(1,-2) and N (9, 13).
    5·1 answer
  • Which of the following describes a situation in which the total distance a basketball player travels is 0 meter from his startin
    8·2 answers
  • The figure above consists of two squares with given areas. What is the perimeter of the whole figure?
    14·1 answer
  • V)
    8·1 answer
  • What is the missing value? (-4, 6) and (p, 7) = -1/2
    15·1 answer
  • Please help me its due in 3 minutes please no links I just need the answer please.
    7·2 answers
  • I might get grounded if I don't get this right
    8·2 answers
  • −5=5(d+4) whats the answer
    14·2 answers
  • Pls help I’ll give crown
    9·1 answer
  • What is the value of x
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!