Jenny wants to buy a history book that costs 10$ she has saved 18$ from her pocket money how much more money does jenny need to buy all three books

$12

Step-by-step explanation:

10$ per book

3 books = 30$

30-18=12

so she needs $12

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x