Answer:
The answer is (A) (-6,4).
Step-by-step explanation:
First you have to multiply the first equation by 6 and the second equation by 4. Then next you subtract the second equation from 1.
30x + 24y = - 84
12x + 24y = 24
18x + 0. = - 108
=> 18x = - 108
=> x = - 108 / 18
=> x = - 6
Then for the next step
then put in x = - 6 in equation 2 and solve for y
(
3x + 6y = 6)
(3×(-6) + 6y = 6)
( - 18 + 6y = 6)
( 6y = 18 + 6
)
( 6y = 24)
(y = 4
)
(I really do hope this helps!!!)
a) (0.17 ac)×(126 min/ac) = 21.42 min
b) I can mow 1/126 ac/min; you can mow 1/117 ac/min. Together, we can mow at a rate that is the sum of these:
... (1/126 + 1/117) ac/min = (117 + 126)/(126×117) = 243/14,742 ac/min
Then it will take 14,742/243 min/ac × 0.17 ac/lawn ≈ 10.31 min/lawn
In order to solve this, you need to make these irregular fractions. So, take the integers, 4, 5, and 1, and multiply them by the denominator, 6(Make sure to keep the denominator below them). You should now have 24/6, 30/6, and 6/6. Next, add each number to it’s corresponding fraction. You should now have 25/6, 35/6, and 11/6. Finally, just reverse them!
A 4 1/6—> 3. 6/25
B 5 5/6—> 4. 6/35
C 1 1/6 —> 1. 6/11
