5a - 10*3 = 45
5a - 30 = 45
5a = 45 + 30
5a = 75
a = 15
Use the identity: 
and solve for 
. You get: 
Do the substitution on the left side to get:
Answer:
X=17
Step-by-step explanation:
AC^2=AB^2 +BC^2(PYTHAGOREAN THEORM)
100=64 +BC^2
36=BC^2
6CM=BC
AD^2=AB^2+BD^2(PYTHAGOREAN THEORM)
X^2 =64+225
X^2=289
X=17
Answer: I can't get out my personal information.... But you can use this website called math-way it can help you with your math and its FREE, also if you want step by step explanations you have to join and you can join for FREE!!!
Answer:
$5.60
Step-by-step explanation:
Multiply the price of your book, $69.95 by the tax .08
69.95 x 0.08 = 5.596, rounded up to 5.60
