Answer:
No
Step-by-step explanation:
equation is y=2x+3
The point we have is (15,29)
i.e. x=15 and y=29
if we put x=15 in the equation we should get the value of y=29
y=2(15)+3
=30-3
=27
Here, we didn't get y=29 instead we got y=27
So the point (15,29) doesn't follow that equation
Answer:
8.06
Step-by-step explanation:
Use the Pythagorean theorem:

The hypotenuse is always the slanted side, or c (x in this picture), but the other numbers can be interchanged. Doesn't matter.
Plug the numbers 4 and 7 into the formula.

Now evaluate them to get 
16+49=65
To get c, take the square root of 65

X = 25, y = 14.
This is possible to solve because the vertical angles (7y and 5y + 28 ; 3x +7 and 4x - 18) are equal to each other. To solve for x, just set the two x equations equal to each other. The same is done for y with the y equations.
Answer: 4
Step-by-step explanation: It's the Pythagorean theorem. a^2+b^2=c^2. You want to set up the equation as a+2^2=5^2, you would subtract 4 from 25 and get 16, square root 16 and you get 4.