Hey could I please get some help with my math?:) which of the following sets of numbers could be the side lengths of a triangle?

10, 10, and 30
4, 7, and 13
2, 3, and 4
9, 13, and 23

the answer is  20,21,29 because  

20 times 20 is 400

21 times 21 is 441

and 29 times 29 is 841

the formula to ge tthe answer is a^2 + b^2 = c^2

20^2 + 21^2= 29^2

then plug the rest in

400+441= 841

Step-by-step explanation:

can i get crown now?

the first 1 I'm pretty sure

Step-by-step explanation:

have a good rest of your day/afternoon :) ❤

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1

you have to put the graph on here with the question

step-by-step explanation: