Answer:
c) 2
Step-by-step explanation:
here you can use cross multiplication. that's where you turn the fraction into an equation. ( there's videos about it, I'm not very good at explaining )
so you can turn
into
5(x + 20) = 15x
5x + 100 = 15x
subtract 5x from both sides
100 = 10x
x = 10.
the value of x/5 would be 2, since 10/5 is 2.
3/11 divided by 3/8 is uh 8/11
5 lots of the value of c added together
Explanation:
By example:
<span>2×6=12=6+6=12</span>
<span>3×6=18=6+6+6=18</span>
<span>5×2=10=2+2+2+2+2=10</span>
<span>5×c=5c=c+c+c+c+c=5<span>c</span></span>
You check if it is even and that the sum of the digits is divisible by 3. That's the divisibility rule of 6.
Answer:
No
Step-by-step explanation:
(-5 + x)( x + 4)= -5*(x+4) +x*(x +4 )
= -5x -20 +x² + 4x
= -5x + 4x + x² -20 = -x + x² -20
= x² - x - 20
(5 + x) (x -4) = 5*(x-4) + x (x-4)
= 5x - 20 + x² - 4x
= 5x - 4x +x² -20 = x + x² - 20
= x² + x - 20