It's the second one -7x^2 because a quadratic equation needs to be squared and that's the only one that provides that, you can also find the differences of each equation to see if it's quadratic
(13+14)+11= 13+(14+11)
Associative property of addition
the choices are below
the predicted mean of the population will be less than 200.
The predicted mean of the population will be less than 245.
The predicted mean of the population will be more than 275.
The predicted mean of the population will be more than 250.
b is the answer
Answer:
c) 14
Step-by-step explanation:
Find the prime factorization of 98
98 = 2 × 7 × 7
Find the prime factorization of 126
126 = 2 × 3 × 3 × 7
To find the GCF, multiply all the prime factors common to both numbers:
Therefore, GCF = 2 × 7
GCF = 14
Have a good day and stay safe!
Step-by-step explanation:
length = width + 4
length×width = 77
using the first in the second equation
(width + 4)×width = 77
width² + 4width = 77
now, what square or squaring factors can create this ?
we are looking for (width + a)(width + b).
we know, this is
width² + (a+b)width + ab
so, what a, b can create 4 (the factor in our actual equation) ?
1, 3 and 2, 2, if we are only looking at whole numbers.
and which of the possibilities can we use to turn 77 into a square number ?
81 is only 4 away ...
2+2 = 4.
aha !
so, we can actually say our equation is
width² + 4width + 4 = 77 + 4
and then
(width + 2)² = 81
width + 2 = 9
width = 7 m
length = width + 4 = 7 + 4 = 11 m
