![wendyyy1214](/avatars/173.jpg)
wendyyy1214
15.10.2019 •
Mathematics
Acertain car lot only sells red and white cars! this month, it has a ratio of red cars to white cars of 3: 2. if there are 55 cars on the lot, total, how many red cars are there?
Solved
Show answers
More tips
- G Goods and services Don t Let Your Fridge Smell Bother You: How to Get Rid of Unpleasant Odors in Your Refrigerator...
- A Animals and plants What Do Terriers Eat?...
- F Food and Cooking Discover the Benefits and Properties of Dates...
- C Computers and Internet Dynamically Assigned IP Address: What Is It and How Does It Work?...
- S Style and Beauty How to Get Rid of Acne: Scientifically Proven Methods...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
Answers on questions: Mathematics
- M Mathematics Triangle angle Bisectors theorem...
- M Mathematics The odds against picking a red marble from a bag are 4:3. what is the probability of picking a red marble...
- M Mathematics supposed we look a two picture of the nighttime sky taken at the same time. One is taken from Bellevue Wa and the other from Bozeman. MT and notice that the moo. is off by .06 degree...
- M Mathematics I need help with these problems from #33 to #40 can someone please help me with them ASAP please and thank you.. can you show step by step please and thank you...
- C Chemistry In ionic bond formation, the lattice energy of ions as the magnitude of the ion charges and the radii in ionic bond formation, the lattice energy of ions as the magnitude of the...
Ответ:
3/5 = x/55
5*11=55
3*11=33
Final 33 red cars
Ответ:
see below
Step-by-step explanation:
A. f(x) = 4x^2 - 7x - 15
We need the numbers to multiply to- 15
1*15 and 3*5
One of the terms multiplies by 4 (or 2)
Try 4 first
4*-3 +5 = -7 That works
-3+5 = -15
f(x) = (4x+5)(x-3)
B. We want the x intercepts so set equal to 0
0 = (4x+5)(x-3)
Using the zero product property
0 = 4x+5 x-3 =0
-5 = 4x x=3
-5/4 =x x=3
C End behavior
Let x be negative infinity
The function is dominate by 4x^2
f(-∞) = 4 ( -∞) ^2 = 4 (∞) = ∞
At negative infinity the functions goes to infinity
Let x be infinity
The function is dominate by 4x^2
f(∞) = 4 ( ∞) ^2 = 4 (∞) = ∞
At infinity the functions goes to infinity
Part D:
We know the zeros at 3 and -5/4
We know the vertex is at halfway between the zeros
(3 -5/4) /2 = 7/4 /2 = 7/8
Since the parabola opens up (The coefficient of the x^2 term is positive), we know we have a minimum.
f(7/8) = 4 (7/8)^2 -7(7/8) -15 = 4(49/64) -1/8 -15 =-289/16
We know the minimum the zeros and the end behavior, we can graph the functions