Answer:
X=13
Step-by-step explanation:
So if ΔABC ≅ ΔDEC, then that means that ∠B is ≅ ∠E. Therefore you would write the equation 3x=6x-39 and solve for X to get 13.
Answer:
$ 2.30
Step-by-step explanation:
Given that the sales tax rate 
The cost of the book is $ 12.99.
So, the tax on the book= 8.5% of 12.99

=1.10
So, the sales tax on the book is $ 1.10.
The cost of the video game is $ 39.99.
So, the tax on the book= 8.5% of 39.99

=3.30
So, the sales tax on the book is $ 3.40.
The difference of taxes on both the items = $ 3.40-$ 1.10=$ 2.30
So, the tax on the video game is $ 2.30 more than then tax on the book.
Answer:
Whitney can bring <u>6 friends.</u>
Step-by-step explanation:
The reason why is this:
Whitney is bringing 400 pounds of things plus <u>her own body weight! </u>
400 + 165 = 565 pounds
Now we add on Whitneys freinds which is <u>165 (their body weight) + the 10 pounds of gear which equals 175 pounds. So each friend would be 175 pounds total weight. </u>
175 x 6 = 1,050 pounds
If we add on Whitneys total weight thats:
565 + 1,050 = 1,615
<u>Adding on another friend would be 1,790 pounds which would be over the weight limit for the vehicle. </u>
Hence, Whitney can bring along 6 friends for her birthday.
<em>Hope this helped! :)</em>
X=-2
You can also check by plugging -2 in for x. Here is a picture. Please notify me if I made an error!
13y-2b=15y
2b=2y
2b=2y
2b=2y