I would just assume <span>a) find the probability that the student guesses EXACTLY 4 correct.
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Answer: 250:1
Step-by-step explanation:
Divide the measurement of appearance by the actual measurement.
The magnification scale is 250:1. The scale is used by a 250X magnifying lense.
Answer:
Hypotenuse or 
in.
Step-by-step explanation:
The Pythagorean Theorem is as follows:
(We know the length of the legs, or a and b, so we can use the formula to find the length of c, or the hypotenuse)
(Simplify)
(Take the square root of both sides)
in.
Answer:
she took 13 classes that were worth 3 credits
Step-by-step explanation:
well we know that some of the classes are worth 3 and some are worth 4 and that all of these together = 59 so your first equation would be
3x+4y=59
x would be the number of classes worth 3 credits and y would be the number of classes worth 4 credits.
then it says the total number of classes that they took was 18 so we know that
x + y =18.
you want to solve for the number of 3 credit classes so lets go ahead and get rid of the y values. SO you need you multiply the x+y equation by 4
4x+4y=72
then subtract 4x+4y=72 from 3x+4y=59 to get
-x = -13
and then x is a negative so you need to divide -1 from both sides and you get that she took 13 classes that were worth 3 credits.
The problem is asking what unit rate is the graph showing
