Lena is buying a soft toy from a shop. The cost of the toy is 10 dollars and she also has to pay a sales tax that is 40% the price of the toy. Select all the equations from the answer choices that can be used to find the total amount paid.
Select all that apply
A
140/x=100/10

B
10/x=100/140

C
140/x=10/10
D
14/x=100/10

Which choice represents the sample space ,s for this event

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

How is working backward similar to solving an equation?