Answer:
Can't guess whether you have written 'x' or you have put a sign of multiplication!!

Now multiple the coefficients and add the exponents with common bases

Now write your final expression

Hope I helped!
Answer:
Width = 9 km
Step-by-step explanation:
Area is length*width, so to find the width, you divide the area by the length. 63/7 is 9.
Equation- l=65-15d
graph- discrete bc it's only for integer numbers
Since the denominator cannot be zero, you can set 4z+1=0 to find the excluded values.
4z+1=0
4z=-1
z=-1/4
And thus, z cannot equal -1/4