That blank is a plus sign
ok so rememmber you can do anythiing to an equation as long as you do it to both sides
-0.3x+2=0.4x-0.1
add 0.3x to both sides
2=0.7x-0.1
add 0.1 to both sides
2.1=0.7x
times 7 both sides
21=7x
divide both sides by 7
3=x
The answer to the question is c
Answer: The area of the circle with a diameter of 10 cm is 78.5 cm2.
Equal to 5.13333...
Or 77/15