News & Resources
Algebra Chapter 16 Lesson 2 Set 1 Problem #3
This is an error in the book by Master Books (ISBN: 978-0890519851) - the book with the blue cover showing the world. The problem is discussing hens and rabbits with a total of 30 heads and 86 feet. ERROR: The solution manual is referring to the wrong problem which is...
Algebra Ch13 Test A Problem #13
Question from Grace: We are using this test A as a practice test. We can't figure out how to solve this. Answer from Dr. Callahan: Grace, To solve this one, you take the square root of each side +/- SQRT ( 16x^2 + 8x +1 ) = +/- SQRT (9) The left side needs a little...
Algebra Ch10.2 #3
Error in Solutions Manual The Solutions Manual has the answer from the older version of the book (which used a flag of 104 x 235. Flags have grown since then. 😉) Just FYI - the older flag was flown in Detroit on the side of the J.L. Hudson Store - which no longer...
Geometry Ch11 test #7b
Question from Anya Course: Geometry Chapter/Lesson/Problem11 test7b Issue: I’m supposed to find Angle APM. To find the angle, I used tan APM=20/70, which gives 15.9 degrees. The solutions manual used sin APM=20/70, which gives 16.6 degrees. Sine is...
Algebra Ch5.6 #15
Ch5.6 #15 As before – all are similar so I will pick the harder one. Givens AB = CD AB = 9(x-2) CD = x + 3(x+5) Therefore, 9(x-2) = x + 3(x+5) Now multiply out and solve 9x – 18 = x + 3x + 15 9x – x - 3x = 15 + 18 5x = 33 x = 6.6 Now go back and find the lengths AB =...
Algebra Ch5.6 #14
Now let’s look at Ch 5.6 #14. Parts a-c are similar – so will do part c since the harder. Area = x + 20 = (x-1)4 > I am just stating all things that are equal based on the given. x+20 = (x-1)4 x+20 = 4x -4 > multiplied out 20 + 4 = 4x – x > moved similar...
Let’s Learn Together!
Nulla quis lorem ut libero malesuada feugiat. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus suscipit tortor eget felis porttitor volutpat. Donec rutrum congue leo eget malesuada. Proin eget tortor risus.