the formula for the perimeter, P, of a rectangle with length 'a' and with 'b' is P=2a+2b. make 'a' the subject of the formula. ​

i dont know

step-by-step explanation:

umm. i dont know

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2

assuming "divided his salary into two" means in half,

he has 215 remaining, plus 200 he originally had before buying a watch

he originally has $415 in his personal account

if this is half the salary, 415 times 2 is $830

his salary would have been $830.