at 7am a sewage treatment tank contains 3000000 gallons of water. starting at 7am, x gallons per minute flow into the tank, and y gallons per minute flow out of the tank. no water enters or leaves the tank otherwise. which of the following functions f models the number of gallons of water in the sewage treatment plant at 8am?

# How can I improve translating words into math?

How can I improve translating words into math?

Ex) pg 47. #2, I got the answer A, but the correct one is C?

What am I mixing up? It happened with multiple questions

# In the “Proving Grounds” Quiz 1 #5 explanation, you state: “…We know that, as a general rule, the remainder when a polynomial f(x) is divided by x – a is f(a).” Can you explain this further?

In the “Proving Grounds” Quiz 1 #5, this question is given:

p(x) = ax^2 + bx + c

q(x) = ax^2 + bx + d

The functions p(x) and q(x) are defined above, and a, b, c, and d are constants. If x – 3 is a factor of p(x) and d is 8 greater than c, what is the remainder when q(x) is divided by x – 3?

In your answer explanation, you state:

“…We know that, as a general rule, the remainder when a polynomial f(x) is divided by x – a is f(a).”

Can you explain this further?

# Is there a way to solve this system of equations without using the quadratic formula (or graphing)?

Is there a way to solve this system of equations without using the quadratic formula (or graphing)?

f(x) = –2/3 x + 4

g(x) = 3(x + 2)^2 – 4

How many solutions does the system above have?

# In the equation below, the angle measures are in radians and a is a constant…

In the equation below, the angle measures are in radians and is a constant.

𝑠𝑖𝑛(𝜋/8)=𝑐𝑜𝑠(𝜋/𝑎)

Which of the following could be the value of ?

# The country hall charges a rental fee of $1000 and at least $3000 for food. Olivia is planning a class reunion…

The country hall charges a rental fee of $1000 and at least $3000 for food. Olivia is planning a class reunion. If she had chosen a buffet that costs $38.56 per person what is the minimum possible number of people who must attend to support the expense?

# there are 50 questions on a quiz given to a class of a students…

there are 50 questions on a quiz given to a class of a students. Only 20% of the class answered all the questions on the quiz. Of the remaining students, half answered two-fifths of the questions and the other half answered three-fifths. What was the average number of questions answered on this quiz?

# In the sequence above, each term after the first is equal to 1/3 of the term immediately before it…

27/5,9/5,3/5

38.In the sequence above, each term after the first is equal to 1/3 of the term immediately before it. what is the value of the first term in the sequence that is less than 1/20.

# If the value of a is 7, which of the following is a possible solution to the system of inequalities

y > -½ x + a

y > 2 x – a

If the value of a is 7, which of the following is a possible solution to the system of inequalities above?

A) (2, 6)

B) (4, 5)

C) (5, 4)

D) (5, 3)

Is there a better way than plugging in the answers to solve this?

# cb practice test 5 section 4 question number 15

cb practice test 5 section 4 question number 15

# For what value(s) of x, 0<x<pi/2, is sinx<cosx

For what value(s) of x, 0<x<pi/2, is sinx<cosx

# A question regarding the order you follow in the PWN guide for the Official SAT Tests…

Hello Mike,

I have a question regarding the order you follow in the PWN guide for the Official SAT Tests. Do you follow the order of the College Board website? I have a blue book The Official SAT Study Guide 2020 edition, with eight SAT tests. The order of the tests does not follow the same order as the one listed in the College Board website, and does not include tests 2 and 4 listed there. Thank you. Regards,

Elizabeth

# f(x) = √x and g(x) = 3x – b…

f(x) = √x

g(x) = 3x – b

If the graph of y = f(g(x)) passes through (6, 5) in the standard (x, y) coordinate plane, what is the value of b?

# In a certain class of 70 students, 4/7 of the students are boys, and the ratio of students 10 years or older to students less than 10 years is 2:3. If 2/3 of the girls are less than 10 years old, how many boys are 10 years old or older?

OK, so you have 40 boys and 30 girls. That’s easy enough to calculate because you’re given a part:whole ratio (boys to total students) and you already know the total number of students is 70. Be careful about the second ratio, though, because it’s a part:part ratio! If the ratio of older to younger is (more…)

# The polygon ABCDEFGHI is a regular 9-sided polygon with consecutive vertices labeled in alphabetical order. What is the measure of angle ACE?

OK, so when you have a regular n-gon, you can figure out each angle in it using this formula: [(n-2)180]/n. In this case, 7*180/9 = 140, so we know each angle in the polygon is 140°. I couldn’t draw this quickly on the computer I’m on, so I found a good n-gon picture to mark (more…)