# mathlete2008

 Benutzername mathlete2008 Punkte 115 Membership Stats Fragen 17 Antworten 20

0
47
1
+115

### What is the greatest common factor of 5!, 10!, and 15!?

mathlete2008  06.07.2020
+1
55
3
+115

### How many four-digit numbers satisfy all of the following conditions?

mathlete2008  01.07.2020
0
58
1
+115

### How many 3-digit numbers have the property that the units digit is at least twice the tens digit?

mathlete2008  30.06.2020
-1
71
1
+115

### In how many ways can 81 be written as the sum of three positive perfect squares if the order of the three perfect squares does not matter?

mathlete2008  30.06.2020
0
95
1
+115

### Find all pairs $(x,y)$ of real numbers $(x,y)$ such that $x + y = 10$ and $x^2 + y^2 = 56$.

mathlete2008  05.05.2020
0
70
8
+115

### Find all values of x such that \frac{2x}{x + 2} = -\frac{6}{x + 4}. If you find more than one value,

mathlete2008  05.05.2020
0
70
1
+115

### Find all values of x such that (9 + 27)/x + 8/(x^2) = 0 If you find more than one value,

mathlete2008  05.05.2020
0
77
3
+115
mathlete2008  04.05.2020
0
82
2
+115

### Find all values of x such that 3x^2 + 16x + 5=0. If you find more than one value, then list your solutions, separated by commas.

mathlete2008  04.05.2020
0
124
3
+115

### Solve (t^2 - 82)^2 = 324 in real numbers.

mathlete2008  04.05.2020
0
117
4
+115

### Solve for c in (c - 3)^2 = 100

mathlete2008  04.05.2020
0
135
4
+115

### Find all real values of t that satisfy the equation t^2 = 196.

mathlete2008  04.05.2020
0
87
2
+115

### Let r and s be the roots of 3x^2 + 4x + 12 = 0. Find r^2 + s^2.

mathlete2008  04.05.2020
0
200
2
+115

### Simplify the expression $\frac{1}{\sqrt{36} + \sqrt{27}} + \frac{1}{\sqrt{27} + \sqrt{18}} + \frac{1}{\sqrt{18} + \sqrt{9}}.$

mathlete2008  04.05.2020
+1
213
2
+115

### A number has the property that its square is equal to 84 more than five times the number. Enter all numbers that have this property.

mathlete2008  03.05.2020