# All Questions +0139389 Questions

+1
552
2
+1442

### Find all real solutions x to 4^x - 2^x = 56.

0
221
1
+956
Julius  Dec 5, 2017
0
213
2

### can u hlp

off-topic
Guest Dec 5, 2017
0
245
1
+566

### Help this problem is killing me i have to know what it is!

SmartMathMan  Dec 5, 2017
+1
211
1
+164

### â€‹ How tall is the triangle?

Walthamx  Dec 5, 2017
+7
383
25
+554

### Play a Game Anyone?

off-topic
Gh0sty15  Dec 5, 2017
+1
251
6
+956
Julius  Dec 5, 2017
0
276
3
+1317

ManuelBautista2019  Dec 5, 2017
+1
325
4
+106

### have a great day

off-topic
foxy02  Dec 5, 2017
+1
217
1
+153

### Multiply: 6a2(4a â€“ 5)

Tiffybean  Dec 5, 2017
+2
388
1
+113

### In the staircase-shaped region below, all angles that look like right angles are right angles, and each of the eight congruent sides marked

MIRB14  Dec 5, 2017
+1
204
1
+394

### help

+19
318
5
+403
off-topic
Donut  Dec 5, 2017
+1
223
1
+394

### On a photograph of a triangular piece of land, help

+2
202
1
+598
michaelcai  Dec 5, 2017
+1
912
2
+598
michaelcai  Dec 5, 2017
+1
246
1
+598

### Some functions that aren't invertible can be made invertible by restricting their domains. For example, the function $x^2$ is invertible if

michaelcai  Dec 5, 2017
+2
434
2
+598

### The function $$f(x) = \frac{cx}{2x+3}$$satisfies $f(f(x))=x$ for all real numbers $x\ne -\frac 32$. Find $c$.

michaelcai  Dec 5, 2017