Which equation is quadratic in form?
4(x – 2)2 + 3x – 2 + 1 = 0
8x5 + 4x3 + 1 = 0
10x8 + 7x4 + 1 = 0
9x16 + 6x4 + 1 = 0

Step-by-step explanation:

we know that

A quadratic equation is a polynomial of second degree

so

Verify each case

case 1) we have

therefore

This is a quadratic equation, because is a polynomial of second degree

case 2) we have

This is a polynomial of fifth grade      

therefore

Is not a quadratic equation

case 3) we have

This is a polynomial of eighth grade

therefore

Is not a quadratic equation

case 4) we have

This is a polynomial of sixteenth grade

therefore

Is not a quadratic equation

answer: 1 and 3

step-by-step explanation:

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.