Question 1 (1 point) subtract and simplify. (y2−3y−5)−(−y2−7y+4) question 1 options: 2y2+4y−9 2y2−10y+4 −2y2−10y−1 question 2 (1 point) multiply and simplify. 6xy3z⋅3x2yx2 question 2 options: 18x4y3z 18x5y4z 18(xyz)10 question 3 (1 point) simplify. −3x3(−2x2+4x−3) question 3 options: −6x6−12x4+9x3 −5x5+x4−6x3 6x5−12x4+9x3 question 4 (1 point) what is the coefficient of the second term of the trinomial? (4a+5)2=16a2+ba+25 question 4 options: question 5 (1 point) simplify. (x−4)(x2−3x−9) question 5 options: x3−7x2−21x+36 x3−7x2+3x+36 x3−4x2−12x+36

1)

2)

3)

4) 40

5)

Step-by-step explanation:

1) Distribute the negative sign that is outside the parentheses and then you must add like terms, as following:

2) According to the Product property of exponents, when you multiply powers with the same base, you must add the exponents. Then:

3) Apply the Distributive property and the Product property of exponents. Then, you obtain:

4) is a square of a sum, then, by definition you have:

Then:

The coefficient of the second term is the number in front of the variable a. Then, the answer is: 40

5)  Apply the Distributive property and the Product property of exponents, then, oyou must add the like terms:

87%

step-by-step explanation:

apex answer