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
PIT_PIT [208]
2 years ago
5

NEED HELP ASAP. WILL GIVE BRAINLY

Mathematics
1 answer:
balu736 [363]2 years ago
5 0

Answer:

A. x = 2 and y =2

B. x = 3 and y = -1

Step-by-step explanation:

A. { x = 3y − 4

    2x − y = 2

1) Substitute the value of x

2(3y − 4) − y = 2

2) Solve the equation for y

y = 2

3) Substitute the value of y

x= 3(2) -4

4) Solve the equation for x

x = 2

Final Solution: x = 2 and y =2

B. { 3x + 2y = 7

     −x + y = −4

1) Multiply both sides of the equation by 3

-3x + 3y = -12

2) Eliminate one variable by adding the equations

  3x + 2y = 7

<u>+ (−3x + 3y = −12)</u>

   5y = -5

3) Divide both sides of the equation by 5

y = -1

4) Substitute the given value of y into the equation -x + y = -4

-x + (-1) = -4

5) Solve the equation for x

x = 3

Final Solution: x = 3 and y = -1

You might be interested in
Chris's pay went from $20/hr to $25/hr after his first evaluation. After his second evaluation his pay was raised to $33/hr. Whe
lara [203]
The first raise was a 25% increase, while the second raise was a 32% increase so there was a 7% increase from the first raise to the second one.
6 0
3 years ago
Is f(x) = 5 to the power of x, growth or decay
jonny [76]

Answer:

growth

Step-by-step explanation:

5 is a positive number greater than 0 (not a decimal) making this growth

8 0
3 years ago
According to the last census (2010), the mean number of people per household in the United States is LaTeX: \mu = 2.58 Assume a
Veseljchak [2.6K]

Answer:

P(2.50 < Xbar < 2.66) = 0.046

Step-by-step explanation:

We are given that Population Mean, \mu = 2.58 and Standard deviation, \sigma = 0.75

Also, a random sample (n) of 110 households is taken.

Let Xbar = sample mean household size

The z score probability distribution for sample mean is give by;

             Z = \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

So, probability that the sample mean household size is between 2.50 and 2.66 people = P(2.50 < Xbar < 2.66)

P(2.50 < Xbar < 2.66) = P(Xbar < 2.66) - P(Xbar \leq 2.50)

P(Xbar < 2.66) = P( \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{2.66-2.78}{\frac{0.75}{\sqrt{110} } } ) = P(Z < -1.68) = 1 - P(Z  1.68)

                                                              = 1 - 0.95352 = 0.04648

P(Xbar \leq 2.50) = P( \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } \leq \frac{2.50-2.78}{\frac{0.75}{\sqrt{110} } }  ) = P(Z \leq  -3.92) = 1 - P(Z < 3.92)

                                                              = 1 - 0.99996 = 0.00004  

Therefore, P(2.50 < Xbar < 2.66) = 0.04648 - 0.00004 = 0.046

7 0
3 years ago
The perimeter of the square is 1 foot how many inches long is each sad
SpyIntel [72]
Im gonna asume you mean side, so 1 foot = 12 inches (: 
3 0
3 years ago
Read 2 more answers
Please show me how to solve the problem
AlladinOne [14]

Answer:

(3x+1)

Step-by-step explanation:

So i start by the little 2 and then the 3 and then 19x +6

4 0
2 years ago
Other questions:
  • Please help fast!!! I need help with question attached!!
    11·1 answer
  • Which of the following expressions is equivalent to 6(5+3x)
    11·2 answers
  • 12.1 ÷ 0.11 = need hhhhhhhhhhhhhhhhheeeeeeeeeellllllllllllppppppppppppp
    11·2 answers
  • 3-2(x + 1)=2x-7<br> SOLVE AND HOW MANY SOLUTIONS ?
    6·1 answer
  • Tell whether the relation is a function (3,-2)(0,1)(1,0)(-2,-1)(2,-1)
    7·2 answers
  • Does this graph show a function? Explain how you know.
    6·1 answer
  • What is -3m2 x -5 x m2 ​
    9·1 answer
  • Revathi reached her grandparents' place at 9:20 a.M. After travelling in a train for 9 hrs and 37 mins. What time did her train
    10·1 answer
  • Two opposite angles of a parallelogram are always
    15·1 answer
  • If 36 men can do a piece of work in 25 days, in how many days will<br> 15 men do it?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!