1. use three units multipliers to convert 1520 meters to feet.
2. find the number that is 27 greater than twice the opposite of itself.
3. write 420 as a product of prime.
4. 2\frac{2}{3} of what number?
5. if f(x)=-5-7x, find f(-2).
6. siplify: (a) -3^{2} (b)
7. factor the greatest common factor of

3

Step-by-step explanation:

420=2x2x3x5x7

recall that 2,3,5,7 are all prime numbers

a=-3456

b=-21/36

Step-by-step explanation:

(7/b)-36=(28/b)

(7/b)-(28/b)=36

7-28=36b

-21=36b

-21/36=b

Since you found one variable substitute it in to find the other variable

28/b=a/72

28/(-21/36)=a/72

28 * (36/-21)=a/72

-48=a/72

72* -48 = a

a=-3456

a=-3456

b=-21/36