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
tankabanditka [31]
3 years ago
6

How can you solve y=3x+2 and -4x+2y=8 with substitution

Mathematics
2 answers:
seraphim [82]3 years ago
7 0
Well, I can't explain how to solve but the answer is (2,8)
Xelga [282]3 years ago
7 0
We have:

y=3x+2~~(i)\\\\ -4x+2y=8~~(ii)

Substituting (i) in (ii):

-4x+2y=8\\\\ -4x+2(3x+2)=8\\\\ -4x+6x+4=8\\\\ 2x+4=8\\\\ 2x=4\\\\ x=\dfrac{4}{2}\\\\ \boxed{x=2}

Using the value obtained above in the expression (i):

y=3x+2\\\\ y=3\cdot2+2\\\\ y=6+2\\\\ \boxed{y=8}
You might be interested in
A chef has 1534lb of beans. She packs them in freezer bags that weigh 214lb each.
Juli2301 [7.4K]

Answer:

That is 1534/214, or about 7. 16lb of beans

8 0
3 years ago
in 1990 Jamaica's population of 2,466,000 was expected to grow exponentially by 1.1% each year. what is the range of the exponen
Misha Larkins [42]

Answer:

Initial population is 2,466,000 ( p0 )

Growth is 1.1% each year ( r=1.1

p(t)=p0(1+r)t

After 30 years, the population of Jamaica should be 3.42 million by that calculation, but it is only 2.95 million, so apparently that growth rate was a little high, or wasn’t sustained.

7 0
3 years ago
Apply the square root principle to solve (x-5)^2-40=0
Nitella [24]

Answer: {5 ± 2√10, 5 - 2√10}

Step-by-step explanation: First isolate the binomial squared by adding 40 to both sides to get (x - 5)² = 40.

Next, square root both sides to get x - 5 = ± √40.

Notice that root of 40 can be broken down to 2√10.

So we have x - 5 = ± 2√10.

To get <em>x</em> by itself, add 5 to both sides to get x = 5 ± 2√10.

So our answer is just {5 ± 2√10, 5 - 2√10}.

As a matter of form, the number will always come before the

radical term in your answer to these types of problems.

In other words, we use 5 ± 2√10 instead of ± 2√10 + 5.

4 0
3 years ago
One half of the sum of 7 and k
igomit [66]
The answer could be (7+k)÷2
4 0
3 years ago
devon records 4 hours of reality shows on her dvr she records comedy shows 3/8 of that amount of time. Devon watches all the rea
scZoUnD [109]
Devon records 3/8 of 4 hours for comedy shows, which is 90 mins worth (1 hour and a half).

Please vote my answer brainliest. thanks!
6 0
3 years ago
Read 2 more answers
Other questions:
  • While waiting for a video game to download, you notice that 30% of 32,000 kilobytes have been downloaded so far. How many kiloby
    7·2 answers
  • What is the product of (-a+3)(a+4)
    12·1 answer
  • The distance from the school to Brandi's house is 1,240 meters. Leaving the school, she rides her bicycle for 60 seconds at a sp
    15·1 answer
  • .
    7·1 answer
  • If the zeroes of the polynomial x^3-14x^2+37x-60 are alpha,beta,gamma,then find
    8·1 answer
  • I am odd number less than 100 the sum of mt digits is 12 i am a multiple of 15 what number am i
    12·1 answer
  • You have 2/3 of salad left over and want to divide among six friends. What expression describes the situation? Explain.
    5·1 answer
  • Which expression represents the product or x3+2x-1 and x4 - x3+3?
    5·1 answer
  • Solve for X<br> (24x – 19)<br> (16х + 13)
    8·1 answer
  • Put all the order possibilities for these.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!