Let the numbers be x and y, then
2x + y = 47 . . . (1)
x + 3y = 56 . . . (2)

(2) x 2 => 2x + 6y = 112 . . . (3)

(1) - (3) => -5y = -65 => y = -65/-5 = 13
From (2), x + 3(13) = 56 => x = 56 - 39 = 17

The two numbers are 13 and 17.

3 0

3 years ago

Need Help Answer Plz!!

Oksanka [162]

Answer:

it is congruent by the SAS postulate

3 0

3 years ago

The lifeguards at the beach post information of surfers by placing 3 flags, one above the other, on a flag pole. If there are 7

barxatty [35]

Answer: 210

<u>Step-by-step explanation:</u>

1st Flag and 2nd Flag and 3rd Flag

7 choices x 6 choices x 5 choices = 210

Using the formula: $\dfrac{7!}{(7-3)!}=\dfrac{7\times 6\times 5\times 4!}{4!}=7\times 6\times 5=\large\boxed{210}$

3 0

4 years ago