Use Cramer's Rule to solve each system.
5x – 3y = 8
-2x - y = 10
2 answers:
Answer: x = - 2
y = - 6
Step-by-step explanation:
A 2 × 2 matrix would be formed. The steps are shown in the attached photo.
Answer:
-2, -6
Step-by-step explanation:
using cramer rule
5 -3
-2 -1
calculatiing the determinant = (5 x-1) - (-3x-2) = -5 -(6) = -5-6=-11
using cramer rule
to calculate x we change the coefficient of x with the answer (8,10)
8 -3
10 -1
we calculate determinant = (8x-1)-(-3x10) = -8-(-30) = -8+30 =22
to calculate x
22/-11= -2
to calculate y we change the coefficient of y with the answer (8,10)
5 8
-2 10
we calculate determinant = (5x10)-(8x-2) = 50 -(-16) = 50 +16=66
to calculate y
66/-11= -6
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Step-by-step explanation:
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Answer:
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Step-by-step explanation:
Answer: isn't it 21 then?
Step-by-step explanation:
kinda bad at math haha
B because if you multiply .15 and .45 by 100 you get 15% and 45%. 45% is much higher than 15%
