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
suter [353]
3 years ago
12

9x-2y=19 7x=21 can you please help me answer this question

Mathematics
1 answer:
avanturin [10]3 years ago
3 0
We have such system of eq
\left \{ {{9x-2y=19} \atop {7x=21}} \right.
First lets solve second eq
7x=21   /:7   divide both sides by 7
x=3
Now we can substitute it to first equation
9x-2y=19
9*3-2y=19
27-2y=19    /-27 subtract 27 both sides
-2y=-8     /:(-2)  divide both sides by -2
y=4 - its the answer

You might be interested in
Pleaseeeee help is it -2 or 16 btw it’s geometry and it needs to be counterexample
Yakvenalex [24]

Answer:

false

Step-by-step explanation:

x can be equal to 2 or -2 since square root of a number can't be negative

4 0
3 years ago
Multiply the polynomials (a2 + 3a – 7) and (2a2 – a + 4). Simplify the answer.
Alex_Xolod [135]
Answer correct or incorrect

8 0
3 years ago
Ella's aquarium holds 55 gallons of water. She is filling the tank and has already put in 22 gallons. Write and solve an inequal
Anuta_ua [19.1K]
Inequality: 22 + x ≤ 50
Answer: x ≤ 18

5 0
3 years ago
Which represents a quadratic function?
Mamont248 [21]
<span>A quadratic function is one of the form f(x) = ax^2 + bx + c, where a, b, and c are numbers with a not equal to zero. In the given question, the only function that satisfies the condition of a quadratic function is f(x) = x^2 + 2x - 5 and thus is the correct answer to the question.</span>
3 0
3 years ago
Read 2 more answers
4(x+6y)-9(2x-5y) simplified with steps please :)
ddd [48]

Answer:

Step-by-step explanation:

Write a system of equations to model the situation. Add the equations to eliminate the y-term and then solve for x. Substitute the value for x into one of the original equations to find y. Check your answer by substituting x = 8 and y = 2 into the original system.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Use the quadratic formula to solve the equation if necessary round to the nearest hundredth
    10·1 answer
  • A town has a population of 4000 and grows at 3.5% every year. To the nearest year, how long will it be until the population will
    11·1 answer
  • Which is better just do number one please and thank you <br> Will mark brainless.
    6·2 answers
  • 19. During a 2 3/4 hour assembly, each speaker spoke for 1/4 of an hour. How many speakers were there?​
    7·2 answers
  • Rose needs to borrow $10,000 from a lender. She wants to keep her interest expense as low as possible. She asks you for advice o
    15·1 answer
  • PLEASE HELP STATTTT
    10·1 answer
  • HELPPPPPPPPP PLZZ
    10·1 answer
  • At the local bakery, Ariel bought 2 oatmeal cookies for $1.50. Mei bought 12 dozen oatmeal cookies for $4.50.
    5·1 answer
  • Are the lines parallel, perpendicular, or neither show work cause I need to understand this
    15·1 answer
  • 1. Joey has 38 bottles. A carton holds 6 bottles. How many cartons does she need?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!