Which of the following expressions are equivalent to −3.5(2 − 3n) − 2.5n?

a. −7 − 8n
b. −7 + 8n
c. −7 − 13n
d. −7 − n(10.5 − 2.5)

(6.03) what is the constant term in the expression 6x3y + 7x2 + 5x + 4? (input a numeric value only.) numerical answers expected! me pls! fast pls

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion