Answer:
AC=7.5 cm
CB=10.5cm
Step-by-step explanation:
Since we don't know the distance from C to B, we can label it as x. Our equation will be x+(x-3)=18. Simplify that so it is 2x-3=18. Add 3 to both sides and get 2x=21. x=10.5 So AC=7.5 cm and CB is 10.5 cm
Answer:
Around 37, first one
Step-by-step explanation:
add up all the 7th grader number, 40
125 divided by 40 is around 3.125
3.125 times 12 = 37.5
37 because there is no half a kid
+ 
= 
Explanation:
1/2 + 1/4 = ?
( 1/2 x 2/2 ) + ( 1/4 x 1/2 ) =
2/4 + 1/4 =
2 + 1 / 4 = 3/4
so, 1/2 + 1/4 = 3/4
Answer:
40/100
Step-by-step explanation:
100/5 = 20
2/5 x 20 = 40/100
Answer:
x = -1.5, -1, 2.
Step-by-step explanation:
I am assuming you want to solve this>
Solve 2x ³ + x ² -7x - 6 = 0
It looks like x = -1 is a solution so we try it:
2*(-1)^3 + (-1)^2 -7(-1) - 6
= -2 + 1 + 7 - 6
= -1 + 1 = 0
So x = -1 is one root.
So (x + 1) must be a factor of P(x)
Now we divide by x + 1:
x + 1)2x ³ + x ² -7x - 6( 2x^2 - x - 6 <--- quotient
2x^3 + 2x^2
-x^2 - 7x
-x^2 - x
-6x - 6
-6x - 6
----------
2x^2 - x - 6 = 0
(2x + 3)(x - 2) = 0
x = -1.5, 2.
