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blsea [12.9K]
3 years ago
9

A study showed that a high school junior enrolled in two AP classes studies 25 hours per week with a standard deviation of 6.2 h

ours. If the school had
300 juniors enrolled in two AP classes, how many would you expect to find who studied more than 25 hours per week? ROUND YOUR ANSWER TO
THE NEAREST WHOLE NUMBER!
Mathematics
1 answer:
NeTakaya3 years ago
4 0
Look man I don’t really know the answer my bad
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Kiko baked a batch of cookies. She ate 3 cookies and then gave half of the remaining cookies to her friends. If c represents the
tatiyna

Answer: (c - 3) / 2 = x

Step-by-step explanation:

If c represents the cookies, then you remove 3 because she ate 3 of the cookies. Since half of the remainder of the cookies were given to her friend, you must divide the product of c - 3, by 2. The reason for the parenthesis is so that it overrules PEMDAS, as parenthesis goes before division.

7 0
3 years ago
Which coordinate pair is a solution of the equation below?
Anni [7]
I think that the answer is b because if you substitute in (4,1) into x-5y=-1 you’ll get 4-5(1)=-1 which simplifies to -1=+1 which is a true statement. I hope that helped (-:
7 0
3 years ago
the point (4,0) lies on a circle with the center at the orgin. what is the area of the circle to the nearsest hundreth?
kvasek [131]

Answer:

50.27 units²

Step-by-step explanation:²

The standard equation of a circle with center at the origin is x² + y² = r², where r is the radius.  Substituting 4 for x and 0 for y yields 4² + 0² = r², so we see immediately that r = 4 units.

The formula for the area of a circle is A = πr².

Here, with r = 4, the area is A = π(4 units)² = 16π units², or

50.27 units² to the nearest hundredth.

3 0
3 years ago
Evaluate (-A)^2 for A = 5, B = -4, and C = 2
drek231 [11]

Answer:

(-A)^2 for A = 5

(-5)^2

=25

Step-by-step explanation:

first, replace A by 5, and maintain the negative to the 5.

multiply (-5)^2.

nb: don't forget to maintain the bracket when multiplying. if you maintain the bracket, you'll get a positive number, but if you don't, you'll get a negative number.

6 0
3 years ago
X - 2y = 2 3x + 3y = 24
Alona [7]
Answer : yes



Explanation yes
6 0
2 years ago
Read 2 more answers
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