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Post New Question
All Questions
+0
234947 Questions
0
454
2
help with counting
How many four-digit numbers do not contain the digit 1 or 2?
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Guest
Jul 21, 2020
0
751
4
geometry problem help?
Four equilateral triangles are constructed on the sides of a square with side length 1, as shown below. The four outer vertices are then joined to form a large square. Find the area of the large square.
read more ..
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Guest
Jul 21, 2020
-1
669
2
+865
help on this one too
nvm solved it
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AnimalMaster
Jul 21, 2020
0
321
1
help with counting question
Let ABCD be a 4-digit integer such that the leading digit A is the sum of the remaining digits. How many possible values of ABCD can there be?
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Guest
Jul 21, 2020
0
829
2
algebra question
Population of town was 21000 in 1980 and it was 20000 in 1990. Assuming the population is decreasing continuously at a rate proportion to the existing population, estimate the population in 2010.
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Guest
Jul 21, 2020
0
522
1
Need help
In which number is the value of the 7 ten times the value of the 7 in the number 1,273
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Guest
Jul 21, 2020
0
626
1
+223
Analytic geometry circle question
What is the area of the portion of the circle defined by that lies above the -axis and to the right of the line ?
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envoy
Jul 21, 2020
0
366
1
help with triangle
Let ABC be a triangle with ∠A = 90 and AB = AC. Let D and E be points on the segment BC such that BD : DE : EC = 3 : 5 : 4. Find ∠DAE.
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Guest
Jul 21, 2020
0
522
1
+163
Geometric Sequences Please Help
The sequence is defined by and
for all Find .
Thanks in advance.
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Firebolt
Jul 21, 2020
0
545
1
algebra
The class average score of a Mathematics score is 91.The average score of the girls is 89 and the average score of the boys is 92.5.There are 24 girls in the class.Find the number of boys.(algebra)
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Guest
Jul 21, 2020
+1
680
1
+865
hard problem!
Given that f(x) is a function such that f(1)=2, f(4)=3, f(7)=4, and f^{-1}(x) is the inverse of f(x), what is f^{-1}(f^{-1}(3))?
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AnimalMaster
Jul 21, 2020
0
649
1
i need help please
Solving Systems Equations by Substitution
Chris has $3.85 in dimes and quarters. There are 25 coins in all. How many of each type of coin does he have?
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Guest
Jul 21, 2020
0
343
0
PLEASE HELPP!!! I would really appreciate it
A club with five men and six women wish to form a committee. The number of men must be between 1 and 3 (inclusive), and the number of women must be between 2 and 4 (inclusive). How many different committees can be formed?
Guest
Jul 21, 2020
0
333
0
please help
Two trains, A and B, leave their respective starting points at the same time and travel in opposite directions. They travel at constant speeds, and pass at point M. One travels at twice the speed of the other. If one of the trains leaves five minutes late
read more ..
Guest
Jul 21, 2020
+1
1099
4
+256
Math Problem
Joe multiplies a number by 4, adds 1, and then divides by 3, getting a result of 7. Sue divides the same original number by 3, adds 1, and multiplies by 4. What result does she get? Express your answer as a common fraction.
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MathWizPro
Jul 21, 2020
0
1068
2
+73
Help pls
Let $G$ be the center of equilateral triangle $XYZ.$ A dilation centered at $G$ with scale factor $-\frac{2}{3}$ is applied to triangle $XYZ,$ to obtain triangle $X'Y'Z'.$ Let $A$ be the area of the region that is contained in both triangles $XYZ$ and $X'Y'Z'.$
read more ..
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Hi121529
Jul 21, 2020
0
355
1
Plz help.
Let a be a real number for which there exists a unique value of b such that the quadratic equation x^2 + 2bx + (a-b) = 0 has one real solution. Find a.
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Guest
Jul 21, 2020
0
550
2
Anyone know this please help
been stuck on this question for months
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Guest
Jul 21, 2020
0
1154
1
Given the function f(x) = 4x – 3 , determine:
Given the function f(x) = 4x – 3 , determine:
f(2)
read more ..
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Guest
Jul 21, 2020
0
466
1
i need help please
Using the same function as in Question #3 ( f(x) = 4x – 3 ), determine the value of x when:
f(x) = – 7
read more ..
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Guest
Jul 21, 2020
+1
746
1
+335
Halp!
Given that $x+y=\frac7{10}$ and $x-y=\frac5{14}$, find the value of $x^2-y^2$, expressed as a common fraction.
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Rayjplayz
Jul 21, 2020
+1
457
1
+163
Math help please
Let and be complex numbers such that is pure imaginary and is not equal to Compute
I'd appreciate any help, and thanks in advance.
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Firebolt
Jul 21, 2020
+1
529
1
+163
I'd appreciate any help
The ellipse and the hyperbola are tangent. Compute
I'd appreciate any help; thanks in advance.
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Firebolt
Jul 21, 2020
0
483
2
need help on this
Findthe length of CD to the nearest tenth of a foot.
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Guest
Jul 21, 2020
0
378
1
HELP(reedited)
the typo i made messed up the whole problem, so here it is again:
Find the number of pairs of integers (x, y) with 0 < x, y < 10 that satisfy
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Guest
Jul 21, 2020
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