1cubic meter of concrete has a wight of 2400 kg. 15% of the concrete is water. the rest of the ingredients are cerment, sand and stone. the weights are in a ratio of 1: 2: 5. work out the weight of cement, sand and stone in the 1 cubic meter of concrete me i have a test coming up

Step-by-step explanation:

2400 × 0.15 = 360

2400 - 360 = 2040

2040 × 1/8 = 255 kg of Cement

2040 × 2/8 = 510 kg of Sand

2040 × 5/8 = 1275 kg of Stone

To check if it is right

255 + 510 + 1275 = 2040 kg

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.