Answer:
Step-by-step explanation:
4.5x=90
x=20 history
28 chemistry
42 math
They add to 90.
History test=x
Chemistry test=1.4x
Math test=(1.5)(1.4)=2.1x
They add to 90
Answer:
The width of the drawer is 
Step-by-step explanation:
we know that
The volume of the drawer is equal to

we have

-----> the deep of the drawer

substitute the given values in the formula and solve for W




Answer:
30%
Step-by-step explanation:
$500-$350=150
150/500 x 100
=30%