the square of a negative number always be positive
eg: -2² = -2×-2 = (-×- = +) +4
the cube of a negative number always be positive
eg: -2³ = -2×-2×-2 = (-×-×- = +) -8
hope it helps...!!!
AD = BC
x+2 = 2x - 3
2x -x = 2+3
x = 5
AB = DC
2y +1 = 3x - 2
2y + 1 = 3(5) - 2
2y + 1 = 13
2y = 13 - 1
2y = 12
y = 6
answer: x = 5 and y = 6
Answer:
Step-by-step explanation:
There are 420 students.
41% are first year students.
41% = 41/100
420 * 41/100 = 172.4
What do you do about the 0.4? I would just round to the nearest whole number which is 172.
There are 420 - 172 = 248 who are not first year students.
<u>answer</u>:
2x²+2x-12
<u>explanation:</u>
(x + 3) (2x – 4) [ open the bracket ]
x(2x) -4(x) +3(2x)+ 3(-4) [ multiplication ]
2x²-4x+6x-12 [ simplify ]
2x²+2x-12 [ final answer ]