Answer:
only the first two i am pretty sure thw other ones make any sense
Step-by-step explanation:
%error=(6.5g/mol - 7g/mol)/(7g/mol) * 100= 7.14% error
Answer:
270
Step-by-step explanation:
becasue 100 percent of 90 would be 90

so multiply

x = 37.5 (or) 
Solution:
Given 
AC = 50, DE = 30, EC = 25, BE = x, BC = 25 + x
To find the value of x:
Property of similar triangles:
If two triangles are similar then the corresponding angles are congruent and the corresponding sides are in proportion.


Do cross multiplication, we get


Subtract 30x from both sides of the equation.

Divide by 20 on both sides of the equation, we get
x = 37.5 (or) 
Hence the value of x is 37.5 or
.
20 nickels = 1 dollar
So, do 20 x 17.
20 x 17 = 340 nickels which is $17.
The answer is 340 nickels!