Answer:
Christopher is 24 years old now
Step-by-step explanation:
I honestly don't know how I got my answer but I know it's correct
Answer:
1236
The first four-digit number where all the digits are different, one being bigger than the one after it.
Let the width = x
=>length = 2x-1
91= x(2x-1)=2x^2-x
2x^2-x-91=0
=(2x+13)(x-7)
=> x=-13/2=> no
=>x= 7 cm
X=12.5
If the perimeter is 90
90=3x+3x+15
Combine like terms
90=6x+15
Subtracts 15 from both sides
75=6x
Divide by six to get x by itself
12.5=x
Does this help?
