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
kap26 [50]
3 years ago
6

Solve: 2x+4y=20 and 2x-y=4

Mathematics
2 answers:
Masteriza [31]3 years ago
5 0

Answer:

X=3.6

Y=3.2

Step-by-step explanation:

  1. 2x-y=4 which means 2x=<u>4+y</u>
  2. 2x+4y = 20 which means <u>4+y</u>+4y=20 ==> 4+5y=20
  3. 5y = 20-4 = 16
  4. y= 16/5 = 3.2
  5. 2x=<u>4+y</u>=4+3.2=7.2
  6. x = 7.2/2 = 3.6

fgiga [73]3 years ago
4 0
Answer:
(x, y) = (18/5, 16/5)
OR
(x, y) = (3.6, 3.2)
You might be interested in
The line with x-intercept of 10 and y-<br> intercept of -2.
Yuri [45]

Answer:

y = \frac{1}{5} x - 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ = x- intercept (10, 0) and (x₂, y₂ ) = y- intercept (0, - 2)

m = \frac{-2-0}{0-10} = \frac{-2}{-10} = \frac{1}{5}

The y- intercept c = - 2

y = \frac{1}{5} x - 2 ← equation of line

8 0
2 years ago
If H= 2f over m+1, solve the equation for f
Viefleur [7K]
H = 2f / (m+1)
[multiply by (m+1)]
h(m+1) = 2f
[divide by 2]
f = (h (m + 1)) / 2

3b / (b+2) = 12 / (b+2)
[multiply by (b+2)]
3b = 12
[divide by 3]
b = 4

3 / (6x + 1) / 2 = 8 / (x + 4) / 3
[multiply both denominators to mike one denominator]
3 / 8(6x+1) = 8 / 3(x+4)
[expand brackets]
3 / (48x + 8) = 8 / (3x + 12)
[multiply by (48x + 8)]
3 = 8(48x + 8) / (3x+12)
[multiply by (3x+12)]
3(3x +12) = 4(48x + 8)
[simplify]
9x + 36 = 192x + 32
173x = 4
x = 4 / 173
8 0
3 years ago
Please help! I will give brainlest answer
Sidana [21]
Connect the bdc letters together.
8 0
3 years ago
Read 2 more answers
Evaluate each geometric series described<br> 1-4+16-64...., n=6
xz_007 [3.2K]

Answer:

- 819

Step-by-step explanation:

The sum to n terms of a geometric series is

S_{n} = \frac{a(r^n-1)}{r-1}

where a is the first term and r the common ratio

Here a = 1 and r = - 4 ÷ 1 = - 4, thus

S_{6} = \frac{1((-4)^6-1)}{-4-1} = \frac{4096-1}{-5} = \frac{4095}{-5} = - 819

5 0
3 years ago
Read 2 more answers
The MOST precise measurements this ruler can give are to the nearest A) inch. B) half inch. C) eighth inch. D) quarter inch.
kifflom [539]
I am pretty sure it’s an inch or A but if i’m wrong sorry
8 0
2 years ago
Other questions:
  • Felipe Vasquez bought some 14₵ stamps and the same number of 22₵ stamps. He paid a total of $1.80 for all the stamps. How many o
    14·1 answer
  • I have 6 surfaces 2 of my surfaces are smaller then the others I can stand up tall what shape am I
    9·2 answers
  • Trapezoid ABCD is congruent to trapezoid . Which sequence of transformations could have been used to transform trapezoid ABCD to
    7·1 answer
  • HELP PLEASE WITH PART A AND B!!!!!
    6·1 answer
  • What is the ratio of 12 to 4​
    8·2 answers
  • Mark estimated that the drive would take 3,000 minutes. It ended up taking 2 days. Did the drive take longer or shorter than he
    8·1 answer
  • Cory earns $9.50 per hour for the first 40 hours he works in a week. For any hours over 40 hours per week, his hourly rate is mu
    14·1 answer
  • Determine whether the following is an example of a sampling error or a non sampling error. A psychiatrist surveyed 8000 people t
    15·1 answer
  • Side lengths: 24 in, 30 in, and 36 in
    9·1 answer
  • The measures of two supplementary angles are (2x – 8)° and (3x - 2)°. What is the measure of the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!