What temperature is 10 degrees higher than minus 7 degrees

This could be done in two ways:
Using a sum
It would be:
-7 + 10
which equals 3

Using a numberline
See the attached numberline. Find -7, and count 10 along to the right to find the answer (3)

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.