Answer:

Step-by-step explanation:

3/4 and 2/5 have a common denominator which is twenty so you can rewrite the equation with just knowing that



You can then multiply both sides by twenty to solve this equation.
Hope this helps.
Answer:
Choice C
Step-by-step explanation:
4x+80=180 degrees
summation of all angles in a triangle is 180°
4 in 4951= 4,000
or in words the 4 is equal to four thousand
hope this helps