Answer:
4
Step-by-step explanation:
1.5 -(-2.5)
Change -(- into addition
1.5 + 2.5 = 4
The answer is 6.
Division is the opposite of multiplication and 3x6 is 18
Answer:
14
Step-by-step explanation:
mass of 100 centimeters of copper wire is 
so, mass of 1 centimeter of copper wire will be 
hence, 14 centimeters of copper wire will provide .28 copper
If you're trying to find the missing side of the "triangle" (the distance from the house to where the ladder touches the ground), you would use the pythagorean theorem, a²+b²=c². (c is always hypotenuse)
a²+b²=c²
12²+b²=15²
144+b²=225
b²=81
√b²=√81
b=9
