ANSWER
A) 7
EXPLANATION
The given triangles are similar
Hence the corresponding sides are in the same proportion.

Simplify the right hand side:

Cross multiply;
6(3x+4)=5×30
Expand
18x+24=180
18x=150-24
18x=126

Answer:
$333.5
Step-by-step explanation:
First we have to find 45% of 230 and then add that value to 230
(we can also find 145% of 230, which is essentially the same thing)
so 45% of 230 is:
230*(45/100)= $103.5
230+103.5= $333.5
Answer:
186 books with the 55% increase
Step-by-step explanation:
120 times 55% increase = 66 more in increase
Now take the increase and add it to the original amount of books to get the number of books with the increase
66 + 120 = 186
Answer:
0.00000797
Step-by-step explanation:
Answer:
Down below...
Step-by-step explanation:
Qualified...
Higher than...