A. Is 4, 5, or 6 the solution of the equation c + 8 + 13? b. Solve 9 - x = 2 mentally.
c. The difference between an ostrich's speed and a chicken's speed is 31 miles per hour. An ostrich can run at a speed of 40 miles per hour. Use mental math or the guess, check, and revise strategy to solve the equation 40 - c = 31 tp find the c, the speed a chicken can run.

a.
b.
c.

555.99.

step-by-step explanation:

hope this

, 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

i saw this question before, dont know the asnwer srry

step-by-step explanation: