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Post New Question
All Questions
+0
232635 Questions
0
367
1
system
For a certain value of k, the system
x + y + 3z = 10
-4x + 8y + 5z = 7
read more ..
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Guest
Jun 18, 2021
0
436
4
to em d uvida me ajudem
eu comprei 99999 maças os meus amigos pegaram um terço quantas maças eu fiquei
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Guest
Jun 18, 2021
0
410
4
help asap!!
In how many ways can you spell the word ROOM in the grid below? You can start on any letter R, then on each step you can step one letter in any direction (up, down, left, right, or diagonal).
\[\begin{array}{ccccc}
R&R&R&R&R\\
M&O&O&O&M\\
M&O&O&O&M\\ <#> M&O&O&O&M\\ <#> R&R&R&R&R <#> \end{array}\]
read more ..
Bginner
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Guest
Jun 18, 2021
0
367
1
Algebra
(a) Let f : R -> R be defined by f(x) = x^2. Show that f(x) has no inverse function.
(b) Let g : (0,inf) -> R be defined by g(x) = x^2. Show that g(x) has an inverse function.
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Guest
Jun 18, 2021
+1
437
2
anyone here speak french?
Convertir en COD ou COI
Mélanie ne sauvegarde pas la dissertation.
Tony apporte les patins dans son sac d’hockey.
Est-ce qu’on a la réponse?
Vous ne téléphonez pas à vos parents.
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Guest
Jun 18, 2021
0
350
1
Piecewise function
Let
f(x) = ax + 3 if x > 0
f(x) = ab if x = 0
f(x) = bx + c if x < 0
read more ..
ElectricPavlov
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Guest
Jun 18, 2021
0
320
1
Piecewise function
Let
f(x) = 4x + 1 if x <=3
f(x) = 18 - 4x if x > 3
Find the sum of all values of x such that f(x) = 0.
read more ..
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Guest
Jun 18, 2021
0
391
1
Geometry question
In square ABCD, AD is 4 centimeters, and M is the midpoint of CD. Let O be the intersection of AC and BM. Let P be the intersection of DO and BC. What is the ratio of BP to PC? Express your answer as a common fraction.
read more ..
heureka
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Guest
Jun 18, 2021
0
342
1
trig
In triangle ABC, cos B = 3/5 and angle A is 90 degrees. What is tan B?
ElectricPavlov
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Guest
Jun 18, 2021
0
394
1
geometry
What is the measure (in degrees) of the smallest interior angle of a triangle in which the exterior angle measures have the ratio 2:3:4?
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Guest
Jun 18, 2021
0
187
0
Inverse Function
Let
f(x) = k(x) if x > 0
f(x) = -1/(2x) - x if x < 0
f(x) = 0 if x = 0
read more ..
Guest
Jun 18, 2021
+2
717
4
+48
Permutations/Combinations
Problem:
A theater group has eight members, of which four are females. How many ways are there to assign the roles of a play that involve one female lead, one male lead, and three different objects that can be played by either gender?
read more ..
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TheOddOne
Jun 18, 2021
-1
594
3
+81
running late rn please
How many nine-digit numbers can be made using each of the digits 1 through 9 exactly once with the digits alternating between odd and even?
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IMAGODLYNOOB
Jun 18, 2021
0
440
1
Help would be greatly appreciated
Line l_1 represents the graph of 3x + 4y = -14. Line l_2 passes through the point (-5,7), and is perpendicular to line l_1. If line l_2 represents the graph of y=mx +b, then find m+b.
TheOddOne
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Guest
Jun 18, 2021
0
442
2
+81
Uhh
In how many ways can four people line up in a straight line if the youngest person cannot be first in line?
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IMAGODLYNOOB
Jun 18, 2021
0
393
2
Help please!!
Find all complex numbers z such that z^4 = -4
Note: All solutions should be expressed in the form , where and are real numbers.
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Guest
Jun 18, 2021
0
354
1
Please help!!
The equation describes the height (in feet) of a ball tossed up in the air at 26 feet per second from a height of 105 feet above the ground. In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest tenth.
read more ..
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Guest
Jun 18, 2021
0
328
1
help number theory
N is a positive integer. When N is divided by 3, the remainder is 2. When N is divided by 4, the remainder is 2. What is the remainder when N is divided by 12?
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Guest
Jun 18, 2021
0
428
1
Help algebra
Let u and v be the solutions to 3x^2 + 5x = 7 = 0. Find u^2 + v^2.
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Guest
Jun 18, 2021
0
338
1
Help algebra
Find the value of y such that 9^y = 3^5*9^6*81^4/27^3.
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Guest
Jun 18, 2021
-1
362
1
PLEASE HELP URGENT
PLEASE HELP URGENT
Michael plots the point with the polar coordinates (−2,−4π3).
How does he plot this point?
read more ..
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Guest
Jun 18, 2021
0
198
0
Inverse function
Let f(x) be defined by
f(x) = 3 - x if x <= 3
f(x) = -x^3 + 2x^2 + 3x if x > 3
Calculate $f^{-1}(4) + f^{-1}(10)$
Guest
Jun 18, 2021
0
393
1
Complex Function
For complex numbers z, let
f(z) = z^2 if z is real
f(z) = z + 2 if z is not real
read more ..
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Guest
Jun 18, 2021
+1
532
4
+137
CPhill/Melody, please help me.
Pat starts with two identical square pieces of paper. On the first one, she draws straight lines that divide the paper into a 3-by-3 grid of squares. The total length of the lines she draws is 18 cm.
On the second piece of paper, Pat draws straight lines
read more ..
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NaturalDisaster
Jun 18, 2021
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