Which statement is true about the equation fraction 3 over 4z − fraction 1 over 4z + 3 = fraction 2 over 4z + 5?

it has no solution.
it has one solution.
it has two solutions.
it has infinitely many solutions.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer