x f(x)
____________
-5 0
-1 36
0 0
1 6
2 0
The function f is defined by a polynomial. Some values of x and f(x) are shown in the table above. Which of the following could define f?
A) (x – 5) (x + 2)
B) (x + 5)^2 (x – 2)^3
C) x^2 (x + 5) (x – 2)^2
D) x (x + 5) (x – 2)
Specifically, can you explain why C is correct but D cannot be?
In a circle with area of 120 to 124 sq inches, the area of the sector formed by an angle is between 20 and 21 sq inches. What is one possible integer value of the angle?
I came up with a low value of 60 (if area of circle is on the lowest end, 120 sq inches, and area of the sector is also on the low end, 20 inches). If both those areas are on the highest end, then I came up with 60 again. But answer is supposed to be 59 ≤ x ≤ 63. Does this make sense, and if so, can you explain it?
Can you work through question 38 on Section 4 of practice test 1? Thanks 🙂
Test 10 Question 23
Test 10 – Question 30
in the xy plane, point (x,y) lies on the circle with equation x^2+y^2=1 and on the line with the equation y=2x what is the value of xy?
It sat math subject test level 1
Thanks in advance 🙂
if (4/3)y = (3/4)x , for what value of x will x = y?
Hello Mike,
Basically, I’m having a little trouble understanding the explanation for #3 on the Working in Three Dimensions section on page 284. I got a little lost after the part where you explained how d was the height (this makes sense to me). Like, how do we “recognize that the ab term in the surface area expression must represent both the top and the bottom of the prism”? I think it’s somewhere from the equation but I don’t know where. I would greatly appreciate your help here Mike. Thanks!
Hello! For question #8 on page 111 in the Exponents and Exponential Functions section, where did the 2^2 come from? The answer was 82.41*2^2= 329.6. Thank you ^_^.
Hi! For question #9 on page 111 in the Exponents and Exponential Functions section, how did you get 2mn in m^2+2mn+n^2=m^2+n^2? Thank you!
If the graphs of y=f ^-1(x) and y=f(x) are identical then each of these graphs must be symmetrical about the
A)y-axis B)X-axis c)origin d)line y=-x e)line y=x
If y varies directly with the square of x and y = 4.3 when x = 5, what is the value of y when x = 6?
A) 0.2
B) 3.0
C) 5.2
D) 6.2
E) 209.3
In the figure above ac is a diameter of a circle with center 0 if ab =3 and bc=5 then the area of the semicircle abc is ?
Hi – I have the fourth edition (2016). Is this the latest edition? Do you have any updates available online? Thanks!
Can you explain a more direct way to solve College Board Official Practice Test 9, Math Section 4 #19, than the College Board’s explanation? I seem to remember something about making a chart to solve mixture problems. Would that work here?
