Adam is going to make concrete
He is going to use
180 kg of cement
375 kg of sand
1090 kg of stone

Cement, sand and stone are sold in bags

1 bag cement 1 bag sand 1 bag stone
25kg 22.5kg 50kg

Adam already has
8 bags of cement
19 bags of sand
20 bags of stone
Work out what bags he needs to buy to make the concrete
Working must be shown

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Y+ 2/y is it a polynomial in one variable or not? and if so, why?