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
Tamiku [17]
2 years ago
13

Substitution would be the best method for solving which system?

Mathematics
2 answers:
natali 33 [55]2 years ago
8 0

Answer:

Assuming its asking which is the easiest one to use substitution its the last one: y= 2x : x + y = 28

Step-by-step explanation:

Because y and x are already one opposite sides you can substitute y in the 2nd equation with 2x. So you'll get 3x = 28 so x = 9.333333334. Then you plug your answer for x in the original equation to get y = 18.666666667

Pepsi [2]2 years ago
5 0

Answer:

The last one

Step-by-step explanation:

Because it tells you what y is

You might be interested in
Ali graphs the function f(x) = -(x + 2)2 - 1 as shown.
lyudmila [28]

The Answer:

The axis of symmetry should be x=2

Step-by-step explanation:

The question clearly states x+2 meaning it shouldn't be - 2

Not entirely sure

6 0
3 years ago
Read 2 more answers
Which expressions are equivalent to 4 to the 5 power choose all that apply
Nuetrik [128]

Answer:

since you didn't put the answer choices, this is what I know...

4 to the 5 power is 1024

it can be written as:

4x4x4x4x4 or 4^5

Step-by-step explanation:

7 0
2 years ago
The speed of a sparrow is x km/h in still air. When the
Semmy [17]

Answer:

x = 5m/s

Step-by-step explanation:

Distance flying out = 12 km  (headwind)

Distance flying back = 12 km (tailwind)

total distance = 12 + 12 =24 km

wind speed = 1km/h

speed going out (with headwind) = (x - 1) km/h

speed coming back (with tailwind) = (x + 1) km/h

Time taken to go out = distance going out / speed going out

= 12 / (x-1)

Time taken to come back = distance coming back / speed coming back

= 12 / (x+1)

total time = time taken to go out + time taken to come back

5 =[ 12/(x-1) ] + [ 12/(x-1)]

expanding this, we will get

5x² - 24x - 5 = 0

solving quadratic equation, we will get

x = -1/5 (impossible because speed cannot be negative)

or

x = 5 (answer)

4 0
3 years ago
Rename numbers using a place value chart
Snowcat [4.5K]
ones tens hundreds thousands millions billions and those are all the place value chart
6 0
3 years ago
Simplify (3x-5x)+(5x+1)
Lemur [1.5K]
First do
3x + -5x = -2x
Then do
-2x + 5x = 3x
Lastly do
3x+1
6 0
3 years ago
Other questions:
  • Which lines are parallel
    14·1 answer
  • the diameter of a small pizza i 9 inches. the diameter of a large pizza is 15 inches. what is the difference in circumference be
    14·1 answer
  • involving a carnival fishpond. Assume that the pond contains 100 fish: 78 purple, 21 blue, and 1 silver. A contestant pays $0.65
    11·1 answer
  • 2.30
    5·1 answer
  • A grocer mixed walnuts worth $1.02 per pound with peanuts worth $0.99 per pound. If she made 69 pounds of a mixture worth $1 per
    5·1 answer
  • Which function has an inverse function?
    5·2 answers
  • A student factors a^6 - 64 to (a^2 - 4)(a^4 + 4a^2 + 16). Which statement about (a^2 − 4)(a^4 + 4a^2 + 16) is correct?
    10·2 answers
  • How many like terms are in the expression? 14x- 14y+7- X + Z + 2x <br>0 <br>2 <br>3 <br>5​
    13·2 answers
  • POINT GIVE AWAY h3bchj3cbjhmjcbwbcwhmdbcwbc
    13·2 answers
  • I REALLY NEED HELP LIKE ASAP
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!