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
Naya [18.7K]
1 year ago
5

Which of the following represents a valid first step to solving this system of equations using the substitution method?

Mathematics
1 answer:
Phoenix [80]1 year ago
7 0

Answer:

2(2y - 1) - y = 7

Step-by-step explanation:

I guess the 2 equations are

2x - y = 7

x = 2y - 1

substitution message that you use one equation to express one variable by the other, and then you use that in the other equation to get one equation for one variable. then you solve for that, and use that result in the first equation to since for the second variable.

the equations are already defined that way, that the second equation directly defines x as an excision of y.

so, this needs to be used then in the first equation.

and that makes

2(2y - 1) - y = 7

the correct first step.

You might be interested in
Elena’s aunt bought her a $150 savings bond when she was born. When Elena is 20 years old, the bond will have earned interest an
Ghella [55]

Answer:

307.5$

Step-by-step explanation:

150$. 105% of it added.

Since 105% is 1.05, multiply the percentage by the cost to get the money added.

150*1.05=157.5

Then ADD it to the price/savings.

150+157.5=307.5$

8 0
3 years ago
Read 2 more answers
64 times -7/8 minus 1/2
Vesna [10]
64 \times (- \dfrac{7}{8}) -  \dfrac{1}{2}

=-56 -  \dfrac{1}{2}

=-56\dfrac{1}{2}
3 0
3 years ago
In their last game the New England patriots scored 9 points in the first half in the second half they scored three less than two
Marat540 [252]

Answer:

3:5

Step-by-step explanation:

first half : 9

second half : 15

9:15 = 3:5

5 0
3 years ago
Read 2 more answers
A public health department charges $25.00 for a flu shot.The vaccine costs $0.78 per shot, a syringe costs $0.51, and the labor
AlladinOne [14]

The cost of a single shot is

.78 +.52 +.96 = 2.26

they charge 25 a shot

25 - 2.26 = 22.74

there is a profit of 22.74 per shot

22.74 * 167 =3797.58

They make $3797.58

5 0
3 years ago
What is the value of f-1(4)
scZoUnD [109]

Answer:

x=4 hope that helps I did it on my calculator story if it is wrong

5 0
3 years ago
Other questions:
  • Which best describes the diameter of a circle?
    10·2 answers
  • A man on the deck of a ship is 14 ft above water level. He observes that the angle of elevation of the top of a cliff is 40 degr
    8·1 answer
  • How many seconds are there in (a) one hour and thirty-five minutes and (b) one day?
    7·1 answer
  • Jeremy has $30. He pays $8 to wash his car. His friend pays back $16 that Jeremy had loaned to him. How much money does Jeremy h
    9·2 answers
  • Please help ASAP hope you can help me
    14·1 answer
  • Divide (24w^10+8w^12)/(4w^4)
    10·2 answers
  • A television costs $258.98. The sales tax rate is 8.5% . How much will. It cost to buy the television
    11·1 answer
  • Pls help, I don't know how to solve this. No files, No links pls, thanks!
    5·1 answer
  • Jane and Joe’s mom cook sausage links for breakfast they are seven links to be shared equally between the children which equatio
    11·1 answer
  • What is the slope of line a? 48 POINTS
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!