First, we need to isolate the variable x.
To isolate x, we simply need to multiply both sides by 9, which would result in x = 9
The scale factor to the problem is 7/8 to produce the radius of sphere B
Let's solve for x the following question:
3/4 (x - 16) = 5/4 (2x - 32)
As I told you on the previous exercise:
Step 1: Solve the parenthesis
3/4 x - 48/4 = 10/4 x - 160/4
Step 2: Like terms
3/4x - 10/4x = -160/4 + 48/4
-7/4x = -112/4
Step 3: Simplifying
-7/4x = -28
Step 4: Multiplying by 4 at both sides:
-7/4x * 4 = -28 * 4
-7x = -112
-7x/-7 = -112/-7
x = 16
(2x-1)^7
=(2x)^7+7(2x)^6(-1)+21(2x)^5(-1)^2+35(2x)^4(-1)^3+35(2x)^3(-1)^4+21(2x)(-1)^5+7(2x)(-1)^6+(-1)^7
=128x^7+7(64x^6)(-1)+21(32x^5)+35(16x^4)(-1)+35(8x^3)+21(4x^2)(-1)+14x-1
=128x^7-7(64x^6)+672x^5-35(16x^4)+280x^3-21(4x^2)+14x-1
=128x^7-448x^6+672x^5-560x^4+280x^3-84x^2+14x-1
The coefficient of x^2 is -84
I've never seen this before
