At Brighton Middle School, Mr. Yule asked 50 randomly selected students from each grade level about their favorite subject,
and 12 chose science. He used this data to draw the inference that about 25% of middle school students will indicate science
is their favorite subject. If there are 200 students all together, did he make a reasonable inference?
O No. Mr. Yule's sample is biased and too small to be representative of the population
O Yes, Mr. Yule's sample is small and biased, so it is representative of the population
O No, Mr. Yule's percentage is too large. He should have used 6%.
O Yes, Mr. Yule's sample is random and representative of the population

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

each side has a different length.  

step-by-step explanation:

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation: