Answer:
y = 2
Step-by-step explanation:
given the 2 equations
5x - 3y = - 11 → (1)
2x - 6y = - 14 → (2)
multiply (1) by - 2, to eliminate the term in y
- 10x + 6y = 22 → (3)
add (2) and (3) term by term
(2x - 10x) + (- 6y + 6y) = (- 14 + 22)
- 8x = 8 ( divide both sides by - 8 )
x = - 1
substitute x = - 1 into either (1) or (2) and solve for y
(1) : - 5 - 3y = - 11 ( add 5 to both sides )
- 3y = - 6 ( divide both sides by - 3 )
y = 2
solution is (- 1, 2 )
Answer:
No inequality given but in my view answer is:
x ≥ 16
Step-by-step explanation:
Given that:
Total time = 6 hours
Remaining Time = 6 - 2 hours = 4 hours (40*6 =240 mins)
Time required for 1 centerpiece = 15 mins
We have to find inequality for x:
Number of centerpieces she makes = x
In 240 mins : 240/15 centerpieces can be made
= 16 centerpieces
If she works with the same speed or more efficiently the suitable inequality would be:
x ≥ 16
I hope it will help you!
Answer:
$140
Step-by-step explanation:
280/1.4=200 (the cost of the coat)
200x0.7 = 140
Answer:
a = 43°
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Sum the 3 angles and equate to 180, that is
a + 8 + 2a + 43 = 180
3a + 51 = 180 ( subtract 51 from both sides )
3a = 129 ( divide both sides by 3 )
a = 43