Answer:
13
Step-by-step explanation:
(3 - 2i)(3 + 2i)
Expand
(9 + 6i - 6i - 4i^2)
Add
(9 - 4i^2)
Convert i^2
i^2 = (
)^2 = -1
(9 - 4(-1))
Add
(9 + 4)
= 13
Answer:
The solution is (2, 1).
All other ordered pairs do not work.
Step-by-step explanation:
-2x + 5y = 1
5x - 3y = 7
-10x + 25y = 5
10x - 6y = 14
19y = 19
y = 1
5x - 3(1) = 7
5x = 10
x = 2
(2, 1)
The solution is (2, 1).
All other ordered pairs do not work.
Ratio and propoertion
cost/amount is constant
1235/95=x/285
cross multiply or time both sides by (95 times 283)
351975=95x
divide oth sies by 95
3705=x
the cost is $3705
Answer:
x = - 20 / 3, y = 14 / 3
Step-by-step explanation:
In the picture
Answer:
a = u - k + b
Step-by-step explanation:
u = a + k - b
u - k + b = a+ k - b - k + b
u - k + b = a
