The legs are 5 inches long.
Use the Pythagorean theorem:

The length of the hypotenuse of the triangle is approximately 7 inches long.

now, there are 1000 grams in one Kilogram, so in 1680 grams, there are 1680/1000 Kilograms, namely 1.680.
Answer:
3
Step-by-step explanation:
a is 4 and 3 is x so 4+3=7
Answer:

Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.