5{3c-[d-2(c+d)]}

PLS ANSWER WILL MARK BRAINLIEST

25c+5d

Step-by-step explanation:

First, write out the equation as you have been given in the problem:

Next, distribute the -2 to the set of parenthesis containing "c+d" and combine any like terms that you can:

Then, distribute the "-"to the "-2c-d" in the brackets and combine and like terms that you can:

Finally, distribute the coefficient 5 to the terms inside the parenthesis:

Therefore, 25c+5d is you simplified answer to the problem.

0.6

39mph

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for