Answer:
option d
Step-by-step explanation:
AB = C
<em>Step 1: Multiply row 1 of matrix B by column 1, 2 and 3 of matrix A to get first column of C</em>
(2x-2)+(3x5)+(-5x-1) (2x-4)+(3x1)+(-5x-3) (2x2)+(3x5)+(-5x-4)
= (-4+15-5 -8+3+15 4+15+20)
= (16 10 39)
<em>Step 2: Multiply row 2 of matrix B by column 1, 2 and 3 of matrix A to get second column of C</em>
(5x-2)+(-4x5)+(2x-1) (5x-4)+(-4x1)+(2x-3) (5x2)+(-4x5)+(2x-4)
= (-10-20-2 -20-4-6 10-20-8)
= (-32 -30 -18)
<em>Step 3: Multiply row 3 of matrix B by column 1, 2 and 3 of matrix A to get third column of C</em>
(-1x-2)+(-1x5)+(3x-1) (-1x-4)+(-1x1)+(3x-3) (-1x2)+(-1x5)+(3x-4)
= (2-5-3 4-1-9 -2-5-12)
= (-6 -6 -19)
<em>Step 4: Form the whole matrix</em>
(16 10 39)
(-32 -30 -18 )
(-6 -6 -19 )
Therefore, option d is correct.
Answer:
136
Step-by-step explanation: 34 multiplied by 4
15s=2550
(divide both sides by 15)
S=170
170 students went
Answer:
40
Step-by-step explanation:
angle CHA is equal to angle HGB because they are alternate interior angles.
This means that angles CHA and AGH are supplementary, add up to 180 degrees.
So, 5x + x + 12 =180
6x = 168
x = 28
<CHG = x + 12 = 28 + 12 = 40
A) f(x) = 2 - 2x
f(0) = 2 - 2(0) = 2 - 0 = 2
f(2) = 2 - 2(2) = 2 - 4 = -2
f (4) = 2 - 2(4) = 2 - 8 = -6
b)
___________
| y = 2x - 5 | y |
________ |__
-2 | -9
-1 | -7
0 | -5
1 | -3
2 | -1
