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
svetlana [45]
2 years ago
7

Please solve the system of equations !!

Mathematics
1 answer:
Dominik [7]2 years ago
6 0

\bold{\huge{\red{\underline{ Solution}}}}

\bold{\underline{ We \: have\: given :-}}

\sf{ 2x + 7y = 3 ...eq(1 ) }

\sf{ x  = -4y ...eq(2) }

<u>Here</u><u>, </u><u> </u><u>we </u><u>will </u><u>use </u><u>the </u><u>substitution </u><u>method </u><u>for </u><u>solving </u><u>the </u><u>above </u><u>equations</u><u>. </u>

\bold{\underline{Subsitute \: eq(1)\:in \: eq(2)}}

\sf{ 2(-4y) + 7y = 3 }

\sf{ -8y + 7y = 3 }

\sf{ - y = 3 }

\sf{ y = - 3. ...eq( 3) }

\bold{\underline{Subsitute \: eq(3)\:in \: eq(2)}}

\sf{ x  = -4(-3) }

\sf{ x = 12 }

\sf{\blue{ Hence, \: The \:value \:of \:x \:and \:y \:is\: 12\: and \:-3}}

You might be interested in
A pie chart shows the relative market share of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What
Andrej [43]
My answer to the problem is as follows:

Since there is 360 degrees in a circle so the fraction that Pepsi represents is
90/360

Therefore, the market share would be 90/360 or 1/4 or 0.25.

I hope my answer has come to your help. God bless and have a nice day ahead!
5 0
4 years ago
If the parents of a family already have two boys, what is the probability that the next two offspring will both be girls?
shepuryov [24]

The probability that the next two offspring will both be girls is 1/3.

To find P both children are girls

A: Event that both children are girls

A: {MM} and B: {MF, FM, MM} →→ P (A ∩∩ B) = {MM}

Probability that both are males, if we know one is a female =P(A/B)=P(A∩B)/P(B)

(P(A∩B)P(B))

Given S = {MM, MF, FM, FF}, we can see that: P (A) = 1414; P (B) = 3434; P (A ∩∩ B) = 1414

Therefore,

P(B/A)=P(A∩B)/P(A) = (1/4)/(3/4)=1/3.

To know more about "Probability"

Refer this link:

brainly.com/question/10725515

#SPJ4

7 0
2 years ago
a tourist drove his car for the total of 17.5 hours while on a 3-day vacation on the first day he drove 4.5 hours in the second
Gelneren [198K]

Answer:

Step-by-step explanation:

34hr

6 0
3 years ago
Phillip places a marker every 16 feet along a 496 foot walkway. how many markers will he use
goldfiish [28.3K]

Phillip would use 31 markers because you would divide 496 by 16 to see how many markers he would place.  Your final answer would be 31 markers.  Hope this helps you!


6 0
3 years ago
Read 2 more answers
Need help asap !! A toy rocket is launched from the ground. The height h (in feet) of the rocket t seconds after it is launched
Sholpan [36]

Answer:

when it will reach 122 feet's is 16*16+128=384

6 0
3 years ago
Other questions:
  • a brownie recipe requires two and two thirds cups of sugar to one cup of chocolate chips. If one and one third cups of sugar is
    5·1 answer
  • SOMEONE ANSWER BRAINLIESTTTTTTT
    6·1 answer
  • What is the answer to 2+2
    8·1 answer
  • Please read the caption! Thanks!! Pls help me :)))
    13·1 answer
  • HELP ASAP PLS AMD THANK YOU
    10·1 answer
  • When a number is doubled and then three is added, the result is 51. Write an equation, then solve to find the number. Show your
    14·1 answer
  • Which coordinate point below is the solution to the system of equations?
    6·1 answer
  • Help me please with my math
    14·1 answer
  • 22. If 20% of d is 18, what is 5% of 2d ?<br> (A) 9<br> (B) 18<br> (C) 36<br> (D) 45<br> (E) 90
    6·1 answer
  • Pls help!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!