Please help I don't get this question

10x+30

Step-by-step explanation:

Using distributive property, we have to take the x and 3 out of the parenthesis and simplify the equation.

10(x+3)

We can write this equation out as...

10 · x + 10 · 3

since 10 · x is 10x and 10 · 3 is 30 we can rewrite the simplified version as...

10x+30

Hope this Helps!!! :)

A = 10x + 30

10 x X = 10x 10 x 3 = 30 10x + 30

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150

, 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