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matrenka [14]
2 years ago
5

Juan wants to find out the percentage of students in his middle school who like to watch soccer. Which of the following strategi

es should he use?
A Ask a random group of people playing soccer after school.

B Divide the number of players on the soccer team by the total number of students in the school.

C Invite people to watch a soccer game at his house and record the percentage of people who come.

D Ask a random group of students from each grade as they enter the cafeteria for lunch.
Mathematics
1 answer:
gayaneshka [121]2 years ago
7 0

Answer:

C or D

Step-by-step explanation:

My gut feeling tells me its either these 2.

Hope i helped:)

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Use the expression 8a+16c<br> What is the value of the expression when a = –5 and c = –1?
cestrela7 [59]

Answer:

i think its 8(a+2c)

Step-by-step explanation:

The GCF or greatest common factor of 8 and 16 is 8.

8a+16c

8(a+2c)

Therefore the answer is 8(a+2c)

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2 years ago
What is 2 lines that form a right angle at their point of intersection
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Answer:

Perpendicular lines.

Step-by-step explanation:

They are called perpendicular lines.

If the slope of one line is m them the slope of the other is -1/m.

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3 years ago
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A scientist is studying a certain strain of bacteria that grows at an exponential rate, doubling each cell every 5 minutes. Imag
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Not sure if the question is complete, but if the cell doubles every five minutes, you must first double the one, then simply square the answer every five minutes. 
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3 years ago
Twenty words were randomly selected from two textbooks. Each set gives the number of letters in each of the twenty words for tha
Alborosie

Answer:

k = 13The smallest zero or root is x = -10

Step-by-step explanation:

you can write "x^2" to mean "x squared"

f(x) = x^2+3x-10

f(x+5) = (x+5)^2+3(x+5)-10 ... replace every x with x+5

f(x+5) = (x^2+10x+25)+3(x+5)-10

f(x+5) = x^2+10x+25+3x+15-10

f(x+5) = x^2+13x+30

Compare this with x^2+kx+30 and we see that k = 13

Factor and solve the equation below

x^2+13x+30 = 0

(x+10)(x+3) = 0

x+10 = 0 or x+3 = 0

x = -10 or x = -3

The smallest zero is x = -10 as its the left-most value on a number line.

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