Mathway | Popular Problems

Popular Problems

Rank	Topic	Problem	Formatted Problem
101	Find the Number of Possibilities	3 choose 5	${}_{3}C_{5}$
102	Find the Number of Possibilities	20 choose 3	${}_{20}C_{3}$
103	Find the Number of Possibilities	12 choose 8	${}_{12}C_{8}$
104	Find the Number of Possibilities	12 permute 4	${}_{12}P_{4}$
105	Find the Number of Possibilities	12 permute 7	${}_{12}P_{7}$
106	Find the Number of Possibilities	10 permute 6	${}_{10}P_{6}$
107	Find the Number of Possibilities	11 choose 8	${}_{11}C_{8}$
108	Find the Number of Possibilities	11 permute 3	${}_{11}P_{3}$
109	Find the Number of Possibilities	11 permute 7	${}_{11}P_{7}$
110	Find the Number of Possibilities	10 permute 4	${}_{10}P_{4}$
111	Find the Number of Possibilities	10 choose 9	${}_{10}C_{9}$
112	Find the Number of Possibilities	10 choose 1	${}_{10}C_{1}$
113	Find the Number of Possibilities	13 choose 7	${}_{13}C_{7}$
114	Find the Number of Possibilities	13 permute 3	${}_{13}P_{3}$
115	Find the Number of Possibilities	14 choose 6	${}_{14}C_{6}$
116	Find the Inverse	[[5,1],[-2,-2]]	$[\begin{array}{c} 5 & 1 \\ - 2 & - 2 \end{array}]$
117	Solve by Substitution	x+16y=9 , 1/4x+4y=8	$x + 16 y = 9$ , $\frac{1}{4} x + 4 y = 8$
118	Solve Using a Matrix by Elimination	x-2y=8 , 3x+4y=4	$x - 2 y = 8$ , $3 x + 4 y = 4$
119	Write Using Negative Exponents	ppp	$p p p$
120	Simplify	(x-9)/(2x)*(9-x)/(6x)	$\frac{x - 9}{2 x} \cdot \frac{9 - x}{6 x}$
121	Solve for y	4x-7y^2+6=0	$4 x - 7 y^{2} + 6 = 0$
122	Solve for y	y^2=4cx	$y^{2} = 4 c x$
123	Solve for x	x/4+1/2=1/8	$\frac{x}{4} + \frac{1}{2} = \frac{1}{8}$
124	Find the Slope and y-intercept	5x-6y-12=0	$5 x - 6 y - 12 = 0$
125	Find the Domain	(m*2)/3	$\frac{m \cdot 2}{3}$
126	Simplify	-4 root of 5x	$\sqrt[- 4]{5 x}$
127	Write in Slope-Intercept Form	8x=5y+9	$8 x = 5 y + 9$
128	Convert to Interval Notation	-5x-2<-12	$- 5 x - 2 < - 12$
129	Convert to Interval Notation	-17<-3x+1	$- 17 < - 3 x + 1$
130	Solve for y	2x-y=-1	$2 x - y = - 1$
131	Simplify	x+2-7	$x + 2 - 7$
132	Find the Continuous Interest Future Value	p=6000 , r=10% , t=4	$p = 6000$ , $r = 10 %$ , $t = 4$
133	Find the Determinant of the Resulting Matrix	[[5,-2],[1,2]]+[[1,4],[3,2]]	$[\begin{array}{c} 5 & 2 & e \\ 8 & f & 6 \end{array}] [\begin{array}{c} f & 7 & 5 \\ 67 & e & 3 \end{array}]$
134	Find the Inverse of the Resulting Matrix	[[5,3],[3,2]][[2,-3],[-3,5]]	$[\begin{array}{c} 5 & 3 \\ 3 & 2 \end{array}] [\begin{array}{c} 2 & - 3 \\ - 3 & 5 \end{array}]$
135	Find the Number of Possibilities	9 permute 2	${}_{9}P_{2}$
136	Solve Using a Matrix by Elimination	x-z+3y=4 , z=3y , y-x=5z	$x - z + 3 y = 4$ , $z = 3 y$ , $y - x = 5 z$
137	Solve Using an Augmented Matrix	2x+y=-2 , x+2y=2	$2 x + y = - 2$ , $x + 2 y = 2$
138	Solve by Substitution	x-3y=-6 , 5x+3y=42	$x - 3 y = - 6$ , $5 x + 3 y = 42$
139	Solve by Substitution	x+3y=9 , 3x-y=7	$x + 3 y = 9$ , $3 x - y = 7$
140	Maximize the Equation given the Constraints	3x+3y=3 , x<y	$3 x + 3 y = 3$ , $x < y$
141	Find Reduced Row Echelon Form	[[1,0,0,-1],[0,1,0,-2],[0,0,2,-3]]	$[\begin{array}{c} 1 & 0 & 0 & - 1 \\ 0 & 1 & 0 & - 2 \\ 0 & 0 & 2 & - 3 \end{array}]$
142	Find the Number of Possibilities	14 permute 3	${}_{14}P_{3}$
143	Find the Number of Possibilities	14 choose 4	${}_{14}C_{4}$
144	Find the Number of Possibilities	13 choose 6	${}_{13}C_{6}$
145	Find the Number of Possibilities	15 choose 4	${}_{15}C_{4}$
146	Find the Number of Possibilities	15 choose 6	${}_{15}C_{6}$
147	Find the Number of Possibilities	16 choose 4	${}_{16}C_{4}$
148	Find the Number of Possibilities	16 choose 5	${}_{16}C_{5}$
149	Find the Number of Possibilities	17 permute 3	${}_{17}P_{3}$
150	Find the Number of Possibilities	11 choose 6	${}_{11}C_{6}$
151	Find the Number of Possibilities	11 choose 1	${}_{11}C_{1}$
152	Find the Number of Possibilities	20 choose 6	${}_{20}C_{6}$
153	Find the Number of Possibilities	20 permute 3	${}_{20}P_{3}$
154	Find the Number of Possibilities	2 choose 2	${}_{2}C_{2}$
155	Find the Number of Possibilities	25 choose 4	${}_{25}C_{4}$
156	Find the Number of Possibilities	26 choose 3	${}_{26}C_{3}$
157	Find the Number of Possibilities	26 choose 5	${}_{26}C_{5}$
158	Find the Number of Possibilities	9 choose 7	${}_{9}C_{7}$
159	Find the Number of Possibilities	8 permute 8	${}_{8}P_{8}$
160	Find the Number of Possibilities	8 permute 1	${}_{8}P_{1}$
161	Find the Number of Possibilities	8 choose 7	${}_{8}C_{7}$
162	Find the Number of Possibilities	8 choose 8	${}_{8}C_{8}$
163	Find the Number of Possibilities	8 choose 1	${}_{8}C_{1}$
164	Find the Number of Possibilities	6 permute 5	${}_{6}P_{5}$
165	Find the Number of Possibilities	52 choose 6	${}_{52}C_{6}$
166	Find the Number of Possibilities	5 choose 0	${}_{5}C_{0}$
167	Find the Number of Possibilities	3 permute 1	${}_{3}P_{1}$
168	Find the Number of Possibilities	4 permute 5	${}_{4}P_{5}$
169	Find the Number of Possibilities	4 choose 6	${}_{4}C_{6}$
170	Find the Number of Possibilities	49 choose 6	${}_{49}C_{6}$
171	Find the Number of Possibilities	4 permute 4	${}_{4}P_{4}$
172	Find the Number of Possibilities	4 permute 9	${}_{4}P_{9}$
173	Find the Number of Possibilities	5 choose 3	${}_{5}C_{3}$
174	Find the Number of Possibilities	50 choose 6	${}_{50}C_{6}$
175	Find the Number of Possibilities	3 permute 2	${}_{3}P_{2}$
176	Find the Number of Possibilities	43 choose 2	${}_{43}C_{2}$
177	Find the Number of Possibilities	59 choose 3	${}_{59}C_{3}$
178	Find the Number of Possibilities	4 permute 12	${}_{4}P_{12}$
179	Find the Number of Possibilities	52 choose 8	${}_{52}C_{8}$
180	Find the Number of Possibilities	6 permute 1	${}_{6}P_{1}$
181	Find the Number of Possibilities	7 choose 0	${}_{7}C_{0}$
182	Find the Number of Possibilities	52 permute 4	${}_{52}P_{4}$
183	Find the Number of Possibilities	9 choose 0	${}_{9}C_{0}$
184	Find the Number of Possibilities	9 permute 0	${}_{9}P_{0}$
185	Find the Linear Correlation Coefficient	table[[x,y],[0,0],[1,2],[2,4],[3,6],[4,8]]	$\begin{array}{c} x & y \\ 0 & 0 \\ 1 & 2 \\ 2 & 4 \\ 3 & 6 \\ 4 & 8 \end{array}$
186	Find the Number of Possibilities	25 choose 9	${}_{25}C_{9}$
187	Find the Number of Possibilities	26 choose 2	${}_{26}C_{2}$
188	Find the Number of Possibilities	2 choose 10	${}_{2}C_{10}$
189	Find the Number of Possibilities	26 permute 3	${}_{26}P_{3}$
190	Find the Number of Possibilities	26 permute 4	${}_{26}P_{4}$
191	Find the Number of Possibilities	2 choose 4	${}_{2}C_{4}$
192	Find the Number of Possibilities	30 choose 1	${}_{30}C_{1}$
193	Find the Number of Possibilities	3 choose 0	${}_{3}C_{0}$
194	Find the Number of Possibilities	2 permute 6	${}_{2}P_{6}$
195	Find the Number of Possibilities	22 choose 4	${}_{22}C_{4}$
196	Find the Number of Possibilities	24 choose 4	${}_{24}C_{4}$
197	Find the Number of Possibilities	21 choose 3	${}_{21}C_{3}$
198	Find the Number of Possibilities	20 choose 7	${}_{20}C_{7}$
199	Find the Number of Possibilities	20 choose 8	${}_{20}C_{8}$
200	Find the Number of Possibilities	20 choose 5	${}_{20}C_{5}$