HERE ARE TWO NUMBER MACHINES A AND B A: INPUT > x7 > -4 > OUTPUT
B: INPUT > x3 > +2 > OUTPUT
BOTH MACHINES HAVE THE SAME INPUT, WORK OUT THE INPUT THAT MAKES A THREE TINES THE OUTPUT OF B. YOU MUST SHOW YPUR WORKING

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?