1.

2.

3. -7/30
4. i believe it is the communitive of multiplication , but not 100% sure
I do not see the exact value, but this is the formula:
Answer:
C. The bottom answer.
Step-by-step explanation:
Answers
1. Solve inside bracket first
7x^2+4x-26+7x^2+3x-15
= (14x^2+7x-41) Answer
2. 5x(6x^2+3x+7)-1(6x^2+3x+7)
= 30x^3+15x^2+35x-6x^2-3x-7
= (30x^3+9x^2+32x-7) Answer
Answer:
28.27
Step-by-step explanation:
Area = 1/4(3.14)(d^2)
Area = 28.27