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
RUDIKE [14]
3 years ago
14

Y=2x-1 2x+y=3 how do i solve this substitution problem

Mathematics
1 answer:
nika2105 [10]3 years ago
8 0

Step-by-step explanation:

y=2x-1 \:  \:  \:  \:  \:  \:  \: ..(1) \\ 2x+y=3 \:  \:  \:  \:  \:  \:  \:...(2) \:  \:  \:  \:  \:  \: (given)

put equation 1 in equation 2

2x+2x - 1=3 \\ 4x = 4 \\ x =   \frac{4}{4}  = 1 \\  \\ x = 1 \\  \\

2(1)+y=3 \\ 2 + y = 3 \\ y = 3 - 2 \\ y = 1

You might be interested in
NEED HELP QUICK! u dont have to give me the answer, giving me the equation to use would be just fine and greatly appreciated!
kykrilka [37]

So for this we will be writing two equations: one representing rachel and the other with oliver. I'll be using the slope-intercept form, which is y = mx + b (m = slope, b = y-intercept). The slope is considered the constant rate of the equation, which in this case its "3 bracelets an hour" and "2 bracelets an hour". The y-intercept is considered the initial value, which in this case with Oliver "he already has 5 bracelets." Using the info above, these are our 2 equations:

Let x = # of hours and y = total bracelets

y = 3x\\ y=2x+5

With these equations, thanks to the transitive property (if a = b and a = c then b = c) she can set 3x and 2x + 5 equal to each other and solve for the number of hours it would take for them to have the same amount of bracelets.

4 0
4 years ago
How do you solve 3/4 + 5/2
solong [7]

Answer:

13/4

Step-by-step explanation:

the method is pretty easy.we find the LCM of the denominator and then see in how many times it comes in the denominator we then multiply the numerator of the given denominator by its multiple of the LCM .Lemme show u how:

LCM of 2 and 4 is 2

hence,(3*1/4*1)+(5*2/2*2)

=3/4+10/4

now the denominators are common so we can add them up it becomes:

=10+3/4

=<u>1</u><u>3</u><u>/</u><u>4</u>

3 0
3 years ago
Read 2 more answers
Qual é a raiz quadrada de 84
Hunter-Best [27]
9.16515138991 es la raíz cuadrada
7 0
3 years ago
If 8y - 8=24 find the value of 2y ​
Mariulka [41]

Answer:

2y =8

Step-by-step explanation:

8y - 8 = 24

First let's find the value of y

Collect like terms and simplify ;

8y = 24 + 8 \\ 8y = 32

Divide both sides of the equation by 8

\frac{8y}{8}  =  \frac{32}{8}

Simplify

y = 4

Substitute 4 for y into 2y

2y \\  = 2(4) \\  = 4 \times 2 = 8

4 0
4 years ago
A cube has a base area (B) of 49 in?. what is the volume?​
timofeeve [1]

Answer:

Base Area , B = 49\\side,a = \sqrt{49 }  = 7\\Volume, V = B* a = 49 * 7 = 343

5 0
3 years ago
Other questions:
  • Please help.. thanks if you do :)
    8·2 answers
  • Find the x-intercepts of the following polynomial function''<br> f (x) = x^2 - 2x - 80
    5·1 answer
  • How many inches are in 10 feet
    10·1 answer
  • Simplify a - {b - [C- (d - e) -f]-g}.​
    7·1 answer
  • A top fuel dragster can use a s much as 6 gallons in 4seconds to travelmile. At this rate, how many gallonsof fuel will it take
    6·1 answer
  • Need help on how to do this problem and finding the answer
    9·1 answer
  • Find an equation of the line through (3,5) and parallel to y = 3x -7. Write the equation using function notation
    6·1 answer
  • Martin uses 5/8 of a gallon of paint to paint 4/5 of a wall what is the unit rate at which Martin paints per gallon?
    11·1 answer
  • From the Deck of 52 cards is drawn at a random . what is the probability of a face card or ace ?​
    6·1 answer
  • PLSSSSSS HELPPPP PLSSSSS 70 POINTSSSS PLSSSSSS
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!