The rref of the identity matrix is the identity matrix because the identity matrix itself is already in Row Reduced Echelon Form.
Thus, no elementary row operations are required to change the identity matrix into Row Reduced Echelon Form.
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First, add the two measurements up, then subtract it from 8.
3 1/2 + 2 1/3
Convert to improper fractions:
7/2 + 7/3
Convert to denominators of 6:
21/6 + 14/6
Add the numerators:
35/6
Subtract from 8:
8 - 35/6
Convert 8 into a denominator of 6:
48/6 - 35/6
Subtract the numerators:
13/6
Convert to a mixed number:
2 1/6
So 2 1/6 of the board is left.
Answer:
Step-by-step explanation:
since they gave us a value for y in the second equation, we can input it into the first equation. so...
Since x is 8 we can find y by substituting 8 for x
a) CE = 16 ft
b) BC = 6√2 ft [ BY Pythagoras theorem]
c) m angle CFD = 90°
d) m angle DBE = 90°
Answer:
$8.75
Step-by-step explanation:
Given data
Bill= $25
Coupon Discount=15%
Tip= 20%
Let us first find 15% of the $25
=15/100*25
=0.15*25
=$3.75
Let us first find 20% of the $25
=20/100*25
=0.20*25
=$5
Hence the coupon and the tip combined is
=3.75+5
=$8.75
