unknown leg length in right tringles

which equation can be used to find the unknown length, b, in this triangle?
5 in.
4^2*b^2=5^2
4^2-b^2=5^2
5^2+4^2=b^2
5^2+b^2=4^2

answer:

4² + b² = 5²

step-by-step explanation:

side lengths in right triangles can be calculated with pythagorean theorem.

a² + b² = c²

"c" is the hypotenuse, the longest side.

"a" and "b" are the other two sides, it does not matter which one is "a" or "b".

in this problem, you are missing "b", which is not the hypotenuse. use the formula.

4² + b² = 5²

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

add 5 subtract 1

step-by-step explanation: