49/-7 and -21/3 are the only two equivalent to -7
Answer:
18) 6x^2-7x-5
19) 20x^2+17x-63
20) 18x^2-20x+2
21) 5x^2+42x+16
Step-by-step explanation:
Perimeter=length×breadth
18) (3x-5)(2x+1)
=6x^2+3x-10x-5
=6x^2-7x-5
19) (4x+9)(5x-7)
=20x^2-28x+45x-63
=20x^2+17x-63
20) (18x-2)(x-1)
=18x^2-18x-2x+2
=18x^2-20x+2
21) (5x+2)(x+8)
=5x^2+40x+2x+16
=5x^2+42x+16
Answer
Find out the $4 is what percent of $50 .
To prove
By using the percentage formula

As given in the question
Part value = $4
Total value = $50
Put all the values in the percentage formula as mentioned above.

solving the above

Percentage = 8%
Therefore $4 is 8% of $50 .
Answer: Again I ask.... What?
Step-by-step explanation:
The answer is 4. Hope this helps!
-Belle