![middlegirlrule9453](/avatars/11991.jpg)
middlegirlrule9453
02.10.2019 •
Mathematics
Iam can i solve this? show your work!
!
Solved
Show answers
More tips
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- H Health and Medicine Headache: A Comprehensive Guide to Treatment...
- C Computers and Internet How to Properly Order Clothing from International Online Stores...
- A Auto and Moto Mastering One-Movement Parking: All You Need to Know...
- D Dating, Love, Relationships How Long Can Love Last?...
- S Society and Politics Is It Fact or Fiction? Let s Talk About Anton Chekhov s Pseudonym...
- F Food and Cooking How to Find Your Zip Code?...
- S Style and Beauty How to choose the best mascara for your eyelashes...
- S Style and Beauty How to Apply Foundation Correctly?...
- S Sport How to Choose Tennis Rackets?...
Answers on questions: Mathematics
- M Mathematics Does the equation x2 - 4x + y2 = -3 intersect the x-axis?...
- M Mathematics If a-b= 3 and[tex] a^{2}-b^{2} [/tex]=33, find the value of a+b....
- M Mathematics A florist uses 5 red roses for every 2 white USE roses in the bouquet. What is the ratio of white roses to red roses three different ways? A. 2/5, 2:5, 2 to 5 B. 5/2, 2/5, 25 C....
- M Mathematics Suppose that we toss a coin three times and record the sequence of heads and tails. let e be the event that at most one head occurs . let f be the event that both heads and tails...
- C Chemistry How do hydrocarbons differ in structure from carbohydrates....
- C Chemistry You would need these tools to set up a filtration device...
- P Physics Any two masses will be...
Ответ:
foci at and
the ellipse has a horizontal radius of 7 and a vertical radius of 6. the major axis is horizontal.
standard form for an ellipse with a horiz. major axis is
the foci are at (±c, 0) and c² = a² - b².
the vertices are at (±a, 0).
for this ellipse in this question, vertices are at (±7, 0), so a = 7
the co-vertices are at (0, ±b).
for this ellipse in this question, co-vertices are at (0, ±6), so b = 6
so the equation for this ellipse is
find foci. since the foci are at (±c, 0) and c² = a² - b², we solve for c
therefore, the foci are at
and
an alternate way to find the equation: you can figure out equation of the ellipse using transformations of a circle.
a circle with a radius of 1 has this equation:
consider y = x². if we want to horizontally expand this parabola by a factor of 2, we need to replace x with (x · 1/2) or x/2, aka multiply x by the reciprocal of the scale factor.
if we want to horizontally expand this circle by a factor of a, we need to replace x with x/a.
since the radius is one, the horizontal radius will be stretched out to a units.
vertically expanding it by a factor of b, we replace y with y/b
so we can start with a circle. then with that circle, horizontally expand it by a factor of 7 units and vertically expand it by a factor of 6 units.
Ответ:
(x−2)(x−4)
Step-by-step explanation: Let's factor x2−6x+8
x2−6x+8
The middle number is -6 and the last number is 8.
Factoring means we want something like
(x+_)(x+_)
Which numbers go in the blanks?
We need two numbers that...
Add together to get -6
Multiply together to get 8
Can you think of the two numbers?
Try -2 and -4:
-2+-4 = -6
-2*-4 = 8
Fill in the blanks in
(x+_)(x+_)
with -2 and -4 to get...
(x-2)(x-4)