Answer:
n = 30
Step-by-step explanation:
Given that y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 180 when x = n, then
180 = kn ( divide both sides by n )
k =
y = x ← equation of variation
y = n when x = 5, thus
n = × 5 = ( multiply both sides by n )
n² = 900 ( take the square root of both sides )
n = = 30
Answer:
x = 21/2
y = -19/2
Step-by-step explanation:
5x - 17 = 4y + 7x
5x - 7x - 4y = 17
-2x - 4y = 17
6x + 8y = - 13
-2x - 4y = 17 | ×2 |
6x + 8y = - 13 | ×1 |
-4x - 8y = 34
6x + 8y = - 13
___________+
2x = 21
x = 21/2
-2x - 4y = 17
-2(21/2) - 4y = 17
-21 - 4y = 17
-4y = 17 + 21
-4y = 38
y = -38/4
y = -19/2
Answer: C
Step-by-step explanation: With inverse equations, you switch y and x (y=f(x)) and undo/reverse the steps towards x.
1. Multiply by 3
2. Add 2
Equation by itself
0. x
1. 3(x)
2. 3(x+2)
Answer:
is that just 1/2 lol i think but if u want add me on disc Andreww#6506
Step-by-step explanation:
Answer:
a.
b.
c.
d.
They are not, the intersection is not 0.
Step-by-step explanation:
a.
The probability that the shopper has neither type of card is the probability of the complement of the union, therefore it would be
b.
That's probability of the intersection of the events. For that we use the following formula
Therefore
c.
That's the probability of A intersection the complement of B.
For that, first of all remember that
Therefore
Therefore
d.
They are not, the intersection is not 0.