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Scorpion4ik [409]
3 years ago
10

How to solve 4x - 2y = 22 and 2x + 4y = 6 using elimination

Mathematics
2 answers:
Scrat [10]3 years ago
7 0

X=5
Y=1
2x+4(2x-11)=6
+44 both sides
2x+8x=50
10x=50
Divide by 10 both sides
X=5
Plug in 5 to x and you will find y

nevsk [136]3 years ago
4 0

The given equations are

4x - 2y = 22 --- Equation Number 1

2x + 4y = 6 --- Equation Number 2

Let's multiply the first equation by 2 . The equation becomes :

8x - 4y = 44

Now let's add both the equations:

(2x + 4y) + (8x - 4y) = 6 +44

or, 2x + 8x + 4y - 4y = 50

or, 10x = 50

or, x = 50/10

or,x = 5

Now put, x =5 in equation number 2, 2x + 4y = 6

2 * 5 + 4 y = 6

or, 10 + 4y = 6

or, 4y = 6-10

or, 4y = -4

or, y = -4/4

or, y =-1

Therefore, x = 5 and y = -1

Hope this helps..!!

Thank you :)


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A car travels 240 miles in 4 hours. at this rate, how many miles will it travel in 8 hours
oksian1 [2.3K]
First you need to find the rate. This problem is based on the formula d = rt
d = distance
r = rate 
t = time.

The question is asking how many miles will it travel in 8 hours so to find this out we need to find the rate when the car travels 240 miles in 4 hours. We use this information and plug it into the model d = rt

d = 240
r = don't know yet
t = 4 hr
d = rt 
240 = 4r
240 / 4 = 4r / 4
60 = r
r = 60
So the car is going at a rate of 60 miles per hour. Now that we know this we can solve for how many miles the car will travel in 8 hours.
d = rt
d = r * t
d = 60 * 8
d = 480

So the car will travel 480 miles in 8 hours

Another way to think about this is that you know the car traveled 240 miles in 4 hours and the question is wanting to know how far the car will travel in 8 hours, which would be double the 4 hours so 240 + 240 = 480

8 0
3 years ago
Twice a number increased by 8 is less than -4
stepladder [879]

Answer:

Twice a number : 2x

increased by : +

8  :  8

is equal to : =

the number : x

increased by :  -

-4  :  -4

The answer is 2x+8 < -4


5 0
3 years ago
How many possible lunches can be made if there are 3 choices for entree and 4 choices for drink?
Lunna [17]

Answer:

12 MULTIPLY AALL THE NO.'S

7 0
2 years ago
What the answer of a/7 = -15
IceJOKER [234]
The answer would be -105. If you multiply 7 x -15 it would give you -105 and then you would have to divide -105 by 7 and its equal to -15.

7 0
2 years ago
H + 52 72<br> ———- = —-<br> 70. 56
oee [108]

Answer:

h = 38

Step-by-step explanation:

\frac{h + 52}{70}  = \frac{9}{7}

h + 52 =  \frac{9}{7}  \times 70

h + 52 =  \frac{9 \times 70}{7}

h + 52 =  \frac{630}{7}

h + 52 = 90

h = 90 - 52

h = 38

the answer is 38.

5 0
2 years ago
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