Answer:
Step-by-step explanation:
Hope it helps!
To answer this, you should "subtract" x+y=7 from 3x+y=45.
What is left is 2x=38, where x then equals 19.
Plug this value into any of the equations (I will choose x+y=7 for simplicity).
19+y=7, y=-12
Check this answer by plugging it into the other equation.
3(19) + (-12) =45
45=45 so it is correct
X=19 and Y=-12
Answer:
6 bags
Step-by-step explanation:
1) 5 sandwiches x $6= $30
2) $42- $30 = 12
If a bag of chips costs 3 times as much as a sandwich then the chips will cost
$2 dollars each bag (6/3=2)
3) 12 / $2 = 6
4) Casey bought 6 bags of chips
1/4.5 because every y is 4.5 times of the x number
Answer:
See Explanation
Step-by-step explanation:
The question is incomplete, as there are lots of missing details in the question. To do this, I will make assumptions
See attachment for question illustration where
the height of the second floor
the distance where the base of the ladder is placed
the length of the ladder
So, we are to solve for x.
Using Pythagoras theorem, we have:
Make the subject
Take square roots of both sides
The above is the expression to calculate the base length of the ladder.
Assume
So, we have: