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
storchak [24]
3 years ago
14

Determine the best method to solve the system of equations. Then solve the system.

Mathematics
2 answers:
maxonik [38]3 years ago
8 0

Answer:

x=1  y = -1/2

(1,-1/2)

Step-by-step explanation:

7x-2y=8  

5x+2y=4

I would use elimination since we have 2y in one equation and -2y in the other

7x-2y=8  

5x+2y=4

--------------------

12x = 12

Divide each side by 12

12x/12 = 12/12

x =1

The substitute back into equation 2

5(1) +2y = 4

5 +2y = 4

Subtract 5

5-5+2y = 4-5

2y = -1

Divide by 2

2y/2 = -1/2

y = -1/2

Artist 52 [7]3 years ago
5 0

Answer:

The best method is the elimination method. The solution is (1, -1/2).

Step-by-step explanation:

7x - 2y = 8

5x + 2y = 4

12x = 12

x = 1

7(1) - 2y = 8

7 - 2y = 8

-2y = 1

y = -1/2

Make sure to write the answer in the form of an ordered pair.

Note: Alternative methods are graphing and the substitution method.

You might be interested in
A plumbers bill is £463.20 plus VAT. The current rat of VAT is 20%. What is the actual cost of work done?
Mila [183]
£555.84

1% of the original value ×20 is £92.64. Add that to the original value (£463.20)
8 0
3 years ago
10. Given that the total distance travelled is 4 km and that the initial aceleration is 4 m/s², find:a) the value of V.b) the va
andrezito [222]

The initial deceleration is 4 m/s^2, so this means that considering the first line segment, \frac{V-100}{T}=-4 \implies V=100-4T.

The total distance traveled is 4 km, which is equal to 4000 meters. This is equal to the area under the graph, so 400T-\frac{1}{2}(100-V)(5T)=4000.

400(100-4T)-\frac{1}{2}(4T)(5T)=4000\\\\40000-1600T-10T^2=4000\\\\10T^2 +1600T-36000=0\\\\T^2 +160T-3600=0\\\\(T+180)(T-20)=0\\\\T=20 (T > 0)\\\\\therefore V=100-4(20)=20

6 0
1 year ago
Help!! I’ll give brainliest! <3
Natalka [10]

Answer:

Step-by-step explanation:

1/2 x because it is always positive and gives half the value of x

8 0
2 years ago
How should I solve for x and what is x?
algol [13]

Answer:

x =12

Step-by-step explanation:

We can use the Pythagorean theorem to solve for x

a^2 + b^2 = c^2

16^2 + x^2 = 20^2

256 +x^2 = 400

Subtract 256 from each side

256-256 +x^2 = 400-256

x^2 =144

Take the square root of each side

sqrt(x^2) =sqrt(144)

x = 12

8 0
3 years ago
I need help asap. anyone?
Charra [1.4K]

Answer:

D

Step-by-step explanation:

Has the correct y-axis and has the graph going the correct way for both functions.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Andre is preparing for the school play and needs to paint the rectangular cardboard castle backdrop that measures LaTeX: 14\frac
    7·1 answer
  • Max drove his car 389 miles on 18.6 gallons of gas how many miles per gallon did Max’s vehicle get to the nearest 10th of a mile
    13·1 answer
  • Marcus drew a line from point Y to point W in the rectangle shown below. He created two identical triangles. Classfy the triangl
    7·1 answer
  • A system of linear equations is graphed. which ordered pair is the best estimate for the solution to the system?
    13·1 answer
  • William bought 6 CDs for $8.97 each. about how much did he spend?
    15·1 answer
  • !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Please help
    8·1 answer
  • There are 24 skittles in a bowl and 75% of them are red. How many skittles are red?
    9·2 answers
  • A jar contains 3 yellow and 7 green marbles. You randomly draw one marble from the jar then REPLACE it and randomly draw a secon
    11·1 answer
  • A television is discounted 20% in a sale. A shopper has a coupon for an additional 15% off the sale price. Which of the followin
    8·1 answer
  • If angle obc=90, angle boc =35 what is the measure of angle bco??? Help this is due today!!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!