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
White raven [17]
3 years ago
15

What is the y-value of the solution to the system of equations?

Mathematics
2 answers:
dimaraw [331]3 years ago
7 0

Answer:

y = 2

Step-by-step explanation:

3x + 5y = 1

7x + 4y = −13

We will use the elimination method to eliminate the x variable. Then we will solve for y. We need the coefficients of the x-terms in the two equations to be additive inverses, so they will add to zero, eliminating x.

Multiply both sides of the first equation by -7, and multiply both sides of the second equation by 3.

-21x - 35y = -7

21x + 12y = -39

Now add the equations to eliminate x.

-23y = -46

Divide both sides by -23.

y = 2

Julli [10]3 years ago
4 0

The answer is y=2 !!!!!!!!!!!!!!

You might be interested in
Solve the equation 3^(2x) -4*3^(x+1) + 27 = 0. use rules of exponents to change 3^(x+1)​
Leviafan [203]

Answer:

\huge\boxed{x=1\ \vee\ x=2}

Step-by-step explanation:

3^{2x}-4\cdot3^{x+1}+27=0\\\\\text{use}\ (a^n)^m=a^{nm}\ \text{and}\ a^n\cdot a^m=a^{n+m}\\\\\left(3^x\right)^2-4\cdot3^x\cdot3^1+27=0\\\\\left(3^x\right)^2-12\cdot3^x+27=0\\\\\text{substitute}\ 3^x=t>0\\\\t^2-12t+27=0\\\\t^2-3t-9t+27=0\\\\t(t-3)-9(t-3)=0\\\\(t-3)(t-9)+0\iff t-3=0\ \vee\ t-9=0\\\\t-3=0\qquad\text{add 3 to both sides}\\\boxed{t=3}\\\\t-9=0\qquad\text{add 9 to both sides}\\\boxed{t=9}

\text{We return to substitution:}\\\\3^x=t\\\\3^x=3\ \vee\ 3^x=9\\\\3^x=3^1\ \vee\ 3^x=3^2\\\\\boxed{x=1}\ \vee\ \boxed{x=2}

4 0
2 years ago
Type the missing numbers in this sequence:<br> -101, -105,<br> -109,<br> -117
PIT_PIT [208]

Answer:

The answer is - 113 that is the correct answer skipping in three's and the first one is - 97

6 0
2 years ago
Read 2 more answers
Need help on this. Don’t understand a thing and I need to get this done ASAP. If you knew please help. It would be greatly appre
matrenka [14]

Answer:

the Lateral SA is 84

The total is 1092.

Step-by-step explanation:

4 0
2 years ago
1. P(x)=x^2+2<br> 2. P(x)= 2x +10
ruslelena [56]

Answer:

see explanation

Step-by-step explanation:

Since p(x) = x² + 2 , if x ≤ 4

For x = 4 then this is included in the inequality x ≤ 4

whereas x > 4 does not include x = 4 but values greater than 4

Thus to evaluate x = 4 use p(x) = x² + 2

4 0
3 years ago
Can y’all help me out please
natta225 [31]
Answer: C
ABCD may or may not be a parellolgram. Line BD bisects line AC, however we cant figure out if line AC bisects line BD.
4 0
2 years ago
Read 2 more answers
Other questions:
  • 144 students enter a spelling bee,but only 1/6 of the group will make into the semi-final round, and only 2/3 that group will ma
    13·1 answer
  • What is 5.6% as a decimal
    11·2 answers
  • Name 5 fractions that are near 4/12 but not equivalent
    10·1 answer
  • Write an expression for the total cost of admission and r rides if an amusement park charges $5 for admission and $2 for each ri
    15·2 answers
  • Evaluate this expression. Choose the best answer. 9! A. 5,040 B. 362,880 C. 326,880 D. 40,320
    15·2 answers
  • Quincy uses the quadratic formula to solve for the values of x in a quadratic equation. he finds the solution, in simplest radic
    10·2 answers
  • Triangle CDA is the image of triangle ABC after a 180° rotation around the midpoint of segment AC. Triangle ECB is the image of
    9·1 answer
  • How do you distribute to solve the equation 28-2(4^2*4)?
    11·1 answer
  • Please help me
    8·2 answers
  • use the matrix tool to solve the system of equations enter the answer as an ordered pair. 8x+5y=9 -x+y=7
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!