Answer:
1) single solution
2) System has no solution
3)System has infinite solutions
4)System has single solution
5)System has no solution
6)System has infinite solutions
Step-by-step explanation:
Given:
1)
y=11 − 2x and 4x − y=7
substituting y=11-2x in 4x-y=7
4x-(11-2x)=7
4x-11+2x=7
6x=7+11
6x=18
x=3
Putting x=3 in y=11-2x
y=11-2(3)
y=11-6
y=5
system has single solution x=3 and y=5
2)
x=12 − 3y and 3x + 9y =24
Substituting x=12-3y in 3x-9y=24
3(12-3y)-9y=24
36-9y-9y=24
12=0
System has no solution
3)
2x + y=7 and -6x=3y − 21
y=7-2x
substituting above in -6x=3y-21
-6x=3(7-2x)-21
-6x=21-6x-21
0=0
x=7-y/2
System has infinite solutions
4)
x + y=15 and 2x − y=15
x=15-y
substituting above in 2x-y=15
2(15-y)-y=15
30-2y-y=15
-3y=-15
y=5
Putting above in x=15-y
x=15-5
x=10
System has single solution x=10 and y=5
5)
2x + y= 7 and -4x=2y + 14
y=7-2x
substituting above in -4x=2y+14
-4x=2(7-2x)+14
-4x=14-4x+14
0=-28
System has no solution
6)
x + 4y=6 and 2x=12 − 8y
x=6-4y
substituting above in 2x=12-8y
2(6-4y)=12-8y
12-8y=12-8y
0=0
x=6-4y
System has infinite solution x=6-4y !
Swim 2 more feet up to reach the surface cos 4+2 is 6 so after swimming up the extra 2 feet he would have emerged from the surface of the water since he has initially already gone up 4 feet after now swimming 6 feet.
Hello,
The answer is 7500 becasue 4x15=60 so 500x15= 7500
Hope this helps
plz mark me brainliest
Answer:
$40000
Step-by-step explanation:
640160≈640000
640000/16=40000
Answer:
3456
Step-by-step explanation:
Simply just get a piece of paper or something to write on, then write the numbers 96 and 36 on top of each other.
Like this:
96
x36
3456
I did not show all of my work, but please trust me this is the right answer and if you question my answer solve it yourself and check your answer with me.
