B - 4.2 < -7.5
subtract b and 4.2
less then sign is <
then <-7.5
Answer:
x=1/2 or 0.5
B. 0.5
Step-by-step explanation:
Step one: Add x to both sides
you then get the equation 7=4x+5
Step two: subtract 5 from both sides
you then get the equation 2=4x
Divide both sides by 4 to undo the multiplication.
2/4=4x/4x
you get x=2/4 which simplifies to 1/2.
It would be 90%..... 45/450= 10%.... so there would be 90% not being used.
Hullo!
Your answer is C! Or 78 cm!!
Hopefully this helps! :D
How to solve: 20^2+5^2=x^2, then you take the square root, therefore x=20.62
