To count for the change you can subtract the numbers
the change from 11 to 12: 61.5 - 59.5 is 2
the change from 12 to 13: 65 - 61.5 is 3.5
the change from 13 to 15 69 - 65 is 4
Hope this helps :)
#5
a - 8 = 10 -2a
a +2a = 10+8
3a = 18
a= 18/3
a= 6
#6
p - 11 -2p = 13 - 5p
Combine like terms
(p - 2p) +(-11) = 13 - 5p
-p - 11 = 13 - 5p
-p + 5p = 13 + 11
5p = 24
p= 24/5
p= 6
#7
12x + 3 - 4x - 3 = 8
Combine like terms
(12x -4x) + (3 - 3) = 8
8x = 8
x= 8/8
x= 1
#8
5x -2 + 3x - 4 = 2x - 8 + 2
Combine like terms
(5x + 3x ) + (-2 - 4) = 2x + (-8 +2)
8x -6 = 2x - 6
8x - 2x = -6 + 6
6x = 0
x= 0/6
x= 0
#17
(5-x)/ 5 = 1
( 5-x)/5 * (5) = 1*5
5 - x = 5
-x = 5 -5
-x = 0
Divide both sides by 1so we can eliminate the negative sign
-x/1 = 0/1
x= 0
I hope i help :)
Answer:
factorisation method
4x² - 3x + 9 = 2x + 1
4x² - 3x-2x +9-1 = 0
4x² - 5x + 8 = 0
sum = -5
product= 4x8
32
factors=(try to look for the numbers when added they give -5 a!d when multiplied they give 32
press the numbers in the position of -5
factorise
each blacket equal it to 0
and solve for the two values of x
54.5981500331 is the answer