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
Lena [83]
3 years ago
13

A math student has a plan to solve the following system by the elimination method. To eliminate the x-terms, he wants to multipl

y the top equation by 7. What
should he multiply the second equation by so that when he adds the equations, the x-terms are eliminated?
-3x-7--56
-7x+10y - 1
Mathematics
1 answer:
MariettaO [177]3 years ago
8 0

Answer:

-3

Step-by-step explanation:

7(-3x-7y-56)

-21x-49y-392

-3(-7x+10y-1)

21x-30y+3

because the eq. multiplied by 7 is negative, the second eq mus be positive in order to eliminate the x variable. this is why we multiply by a (-). by multiplying the second eq by 3, both eq. will result in a coefficient of 21. one positive one negative allowing the x variable to be eliminated from the problem.

You might be interested in
Please help? correct gets brainliest tysm!
olchik [2.2K]

Answer:

B

Step-by-step explanation:

Please mark me brainleist

8 0
3 years ago
Read 2 more answers
What is 7.214 rounded to the nearest hundredths
Olin [163]
7.214 rounded to the nearest hundredth is 7.21<span />
7 0
4 years ago
Read 2 more answers
Find the Surface Area.<br> 18m2<br> 20m2<br> 16m2<br> 15m2
Levart [38]

Answer:

20 meters square

Step-by-step explanation:

Surface Area of this square based pyramid =  A  = base area + 4* (face area)

A = (2 *2)  +  4* ( (1/2)*2 * 4) )

A = 4 + 4*(4)

A = 4 + 16 = 20

A = 20 square meters

6 0
3 years ago
If f(x) =3x^2 -2 and g(x) = 2x+ 4 , find (f - g) (x).
melisa1 [442]

Answer: A

Step-by-step explanation:

(f-g)(x)=f(x)-g(x)=(3x^{2}-2)-(2x+4)=3x^{2}-2-2x-4=\boxed{3x^{2}-2x-6}

5 0
3 years ago
according to a survey conducted by the Texas Free Press 25 out of 500 people do not have internet access at their home what perc
guapka [62]

Answer:

95%

25/500=.05

1 -.05=.95

4 0
3 years ago
Other questions:
  • James has to fill 40 water bottles for the soccer team. Each bottle holds 500 milliliters of water. How many liters of water doe
    12·1 answer
  • Suppose m &lt; ABC = 110. what is m &lt; DBC
    15·1 answer
  • Find the value of x
    10·1 answer
  • 17°F below 0<br> Integer
    7·1 answer
  • Dewayne has $20 dollars for the weekend. He spent 3/5 of his money at the movies and 1/3 of his money bowling. How
    11·2 answers
  • Using the point-slope formula (picture)
    5·1 answer
  • In Triangle XYZ, A is the midpoint of XY, B is the midpoint of YZ, and C is the midpoint of XZ.
    6·1 answer
  • A recipe says The repice call for
    14·1 answer
  • Can someone help me?
    12·2 answers
  • Find the geometric mean of 4 and 49
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!