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) \frac{1}{-3^{-2} }
7. factor the greatest common factor of 3a^{2}b^{3}c^{2} - 6a^{3}b^{2}c^{4}

1. 4560 ft.

2. 9

3. 2 × 2 × 3 × 5 × 7

4. 3

5. f(-2) = 9

6. - 9, - 9

7.

Step-by-step explanation:

1. We have to convert 1520 meters to feet using 3 as a unit multiplier.

So, 1520 m = (1520 × 3) ft = 4560 ft. (Answer)

2. Assume the number is x, then the opposite number is - x.

So, given that -2x + 27 = x

⇒ 3x = 27  

⇒ x = 9 (Answer)

3. 420 = 2 × 2 × 3 × 5 × 7 (Answer) {Using factorization method.}

4. 2 is of 3. Since, . (Answer)

5. if f(x) = - 5 - 7x, then f(-2) = - 5 - 7(- 2) = - 5 + 14 = 9 (Answer)

6.a) and

b) (Answer)

7. We have to factor the greatest common factor of

. (Answer)

the mean and mad

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: