Answer:
y = -4
x = -2
Step-by-step explanation:
Hi there...
y = 2x
y = -x - 6
Since why is equal to 2x, we can plug it in for y in the second equation. Here's what I mean...
2x = -x - 6
add x on both sides...
3x = -6
divide by 3 on both sides...
x = -2
Now, plug in x for y. Here's what I mean...
y = 2x
y = 2 (-2)
y = -4
Hope this helps :)
200 km....... 3,5 h
100 km........1,5 h
v1= 200/3,5=57,1
v2= 100/1,5= 66,6
vm=( 57.1+66,6)/2≈ 61,5 km/h
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A simple way to find out:
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Answer: They will take 3 3/4 hours to paint the room together.
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A more detailed explanation:
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Alice:
6 hours = 1 room
1 hour = 1/6 of the room
Tom:
10 hours = 1 room
1 hour = 1/10 of the room
Alice and Tom together:
1 hour = 1/6 + 1/10 = 4/15 of the room
4/15 of the room = 1 hour
1/15 of the room = 1 ÷ 4 = 1/4 hour
15/15 of the room = 1/4 x 15 = 15/4 = 3 3/4 hours
Answer: They will take 3 3/4 hours to paint the room together.
Answer:
Jack is 88, Priscilla is 75.
Step-by-step explanation:
Let J represent Jack's age and let P represent Priscilla's age.
Their age totaled 163, so:
![J+P=163](https://tex.z-dn.net/?f=J%2BP%3D163)
And we know that Jack was 13 years older than Priscilla. In other words:
![J=13+P](https://tex.z-dn.net/?f=J%3D13%2BP)
Solve for J and P. To do so, substitute the second equation into the first:
![13+P+P=163](https://tex.z-dn.net/?f=13%2BP%2BP%3D163)
Combine like terms:
![2P+13=163](https://tex.z-dn.net/?f=2P%2B13%3D163)
Subtract 13 from both sides:
![2P=150](https://tex.z-dn.net/?f=2P%3D150)
Divide 2 from both sides:
![P=75](https://tex.z-dn.net/?f=P%3D75)
So, Priscilla is 75 years old right now.
Jack is 13 years older meaning that Jack is 88 years right now.
And we're done!