Lines s and t are parallel. Find the value of x.
PLEASE HELP, THANKSS

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

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.

If 20% of a number is 35, what is 50% of that number?