8 questions; if you solve all of them (with the numbers next to the question) you will get 80 points. Write a formula for the given measure. Tell what each variable it represents. Identify which variable depends on which formula.
4. the perimeter of a rectangle with a length of 5 inches
5. the area of a trapezoid with base lengths of 7 feet and 11 feet
Tell whether the ordered pair is a solution of the equation.
6. y = 4x; (0.4)
7. y = 3x; (2,6)
8. y = 5x - 10; (3,5)
9. y = x+7; (1,6)
10. y = 7x + 2; (2,0)
11. y = 2x - 3; (4,5)

there is only 40

Step-by-step explanation:

me i beg !

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