Answer:
.
Step-by-step explanation:
(x+2)(x+4)
=x(x+4)+2(x+4)
=x²+4x+2x+8
=x²+6x+8
Answer:
x = 8.64
x = - 7.64
Both to 2 d.p
Step-by-step explanation:
Firstly, - 8 both side - cancels the +8 & get the surd to equal x - 8
Then, square root both side, to get:
x-2= x^2 - 64
+ 2 both side
x = x^2 - 66
-x
0= x^2 - 66 - x
x^2 - x - 66 = 0
general equation for quadratic is ax^2 + bx + c
Now, we can find the value of a, b, c using x^2 - x - 66 = 0
a=1
b= - 1
c= - 66
Now use quadratic formula
x = -b±√(b²-4ac))/(2a
= --1 + √ - 1 x - 1 - 4x1x-66 / 2x1
= 8.639.....
Now repeat with - b - & not - b +
x = -b±√(b²-4ac))/(2a
= --1 - √ - 1 x - 1 - 4x1x-66 / 2x1
= - 7.639.......
Y=|2x|
x=|2y|
x=2y
x/2=y
f^-1(x)=x/2
Left is the answer. Hope this helps
Answer:
m<10
Step-by-step explanation:
Inequality is used to show comparison between two values. It helps to determine which is
• Greater than (>),
• Less than (<),
• Equal to(=),
• Not equal to,
• Greater than or equal to,
• Less than or equal to.
• Greater than is used when one value is more than the other.
• Less than is used when a value is less or smaller than another value.
• Equal to is used when both values are the same.
• Not Equal to is used when both values are not the same
Let Ken marbles= m
Remember that Ken's marbles is fewer than Joe's, that is less than Joe's marbles.
The inequality will be
m<10
