I need Help ASAP i turn this in tomorrow and i have no Idea how to do it

Give Brianly award plz

trying to rank up

Step-by-step explanation:

9. Start with 900 down cost. Cost increases by 5 each house. Cost is going UP

C = 900 + 5*b

Where C is cost and b is # of bird houses

905,910,915,920,925,930,935

10.

Start with owing 500. if u pay BACK 15, you will owe 15 LESS. meaning:

X = 500 - 15*m

where x is amount owing and m is number of months

485, 470, 455, 440, 425, 410, 395

11.

starting with 0, u simply add 10 to ur account each week

S = 10*w

where S is savings and w is # of weeks

10,20,30,40,50,60,70

12.

Like question 11., you adding 10 but start with $25

S = 25 + 10w

35,45,55,65,75,85,95

7

step-by-step explanation:

multiple all that

step-by-step explanation:

27×17