Ineed big time. i will get a 0 if i don't get this right

solve by substitution.

a shopper purchased 8 t-shirts and 5 pairs of pants for $220. the next day, he purchased 5 t-shirts and 1 pair of pants for $112. how much does each t-shirt and each pair of pants cost?

T-shirts cost $20; each pair of pants cost $12.

Step-by-step explanation:

x is T-shirts ; y is each pair of pants

(8x+5y=220) -1

(5x+y=112) 5

-8-5y=220

25+5y=560

17x=340

x=20

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m