3 years ago

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:

2x-y=4 which means 2x=4+y
2x+4y = 20 which means 4+y+4y=20 ==> 4+5y=20
5y = 20-4 = 16
y= 16/5 = 3.2
2x=4+y=4+3.2=7.2
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

Examine the system of equations below. Which choice will not result in an equation that would also belong to this

zaharov [31]

I would say that it is either B. Multiply the second equation by 4. Then add that result to the first equation or D. Add the two equations together

5 0

3 years ago

What is the length of the segment whose endpoints are A(-4, 3) and B (10, 6)?

nlexa [21]

Apply Pythagoras:

length = sqrt( (10--4)² + (6-3)² ) = sqrt(205)

7 0

3 years ago

Read 2 more answers

A car wash detailed 256 cars in 8 hours. At what rate did the car wash detail

Minchanka [31]

32 cars per hour. If you do 256 divided by 8 you get 32.

Hope this helped!

4 0

3 years ago

Graph the solutions of the inequality

Fiesta28 [93]

Answer:

The graph in the attached figure

Step-by-step explanation:

Graph the solution of the inequality

$t\leq -4$

we know that

The solution is the interval ---> (-∞,-4]

All real numbers less than or equal to -4

In a number line the solution is the shaded area at left of t=-4 (closed circle, because the number -4 is included in the solution))

using a graphing tool

The graph in the attached figure

6 0

3 years ago

16 pairs of socks cost $40 write the unit rate to find the cost of each pair

andre [41]

Unit rate = price/quantity
= 40/16
=2.5 per pair (2.5/1)

6 0

3 years ago