A collection of animals including both birds and beasts has 43 heads and 120 feet how many based are there in the collection

Step-by-step explanation:

x = number of birds

y = number of beasts

x + y = 43 (as each of these creatures had only 1 head).

2x + 4y = 120 (birds have 2 feet, beasts 4 feet).

x + 2y = 60 (divided both sides by 2)

so, second equation minus the first equation is

(x-x) + (2y-y) = 60-43

y = 17

x + y = 43

x + 17 = 43

x = 26

so, there are 17 beasts and 26 birds.

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1