Answer:
y = 50 + 35x we dont know how many hours they worked
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given that,
A bricklayer needs to order 6300kg of building sand.
1 grain of this sand weighs
.
We need to find how many grains of sand are there in 6300 kg.
It can be just calculated as follows :
1 grain of sand = 

or
= 90000000 grans of sand
So, 6300 kg is equal to
.
For the first one it’s subtraction property of equality
Answer:
the answer is 94.2
Step-by-step explanation: