A is 6, a = 6
b = -1 - 7a
b = -1 - 7(6)
b = -1 - 42
b = -43
Answer:
1. 3,4,5,6
Because if you were to do 3+4+5+6 Then divide by 4. You get 4.5.
2. -6 + (-4) + (-2) + 2 + 4 + 6
Gets you 0
Step-by-step explanation:
Sorry if this doesn't help.
Answer:
(x+6)(x+2)(x-5)(x-7)
Step-by-step explanation:
step 1: ((((x4)-(4•(x3)))-72x2)+136x)+420
step 2: ((((x4) - 22x3) - 72x2) + 136x) + 420
step 3: Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, 2 and 6
x2 + 2x + 6x + 12
step 4: Add up the first 2 terms, pulling out like factors :
x • (x+2)
Add up the last 2 terms, pulling out common factors :
6 • (x+2)
step 5: Add up the four terms of step 4 :
(x+6) • (x+2)
Which is the desired factorization
I’m gonna have to take a wild guess and say 10. I won’t give you and explanation but just take my word
The oldest age noel can be is 10 because
you set up the equation let’s say noels brother is x so x=3n and the other equation x+n<20 so then you replace x with 3n since there equal to each other so u have 3n+n<20 the you subtract n and 3n by n to eliminate the variable and u end up with 2n<20 and you divide both sides by 2 to get the variable by its self and then you get n<10
