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216179 Questions
0
54
1
Probability
What is the probability, expressed as a decimal, of drawing one marble which is either red or blue from a bag containing 3 red, 3 blue, and 6 yellow marbles?
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Guest
Jul 4, 2022
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58
2
help geometry
In the diagram, AOB is a sector of a circle with angle AOB = 60. OY is drawn perpendicular to AB and intersects AB at X. What is the length of AB?
read more ..
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Guest
Jul 4, 2022
+9
73
2
+1132
Super hard. PLLLLLSSSSS help. CPhilllll
Evaluate
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nerdiest
Jul 4, 2022
0
59
2
trig question
Find the acute angle A such that sin 7A = cos 5A.
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Guest
Jul 4, 2022
0
1
42
2
Probability
If 2 cards from a standard deck are selected randomly, what is the probability that at least one king or at least 1 ace occurs? (There are 4 Aces, 4 kings and 52 total cards in a standard deck.)
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Guest
Jul 4, 2022
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54
1
trapezoid
The measure of one of the smaller base angles of an isosceles trapezoid is 60 degrees. The shorter base is 5 inches long and the altitude is sqrt(3) inches long. What is the number of inches in the perimeter of the trapezoid?
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Guest
Jul 4, 2022
0
44
1
Number Theory
What is the remainder when the sum 1 + 7 + 13 + 19 + ... + 253 + 259 + 265 + 271 is divided by 6?
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Guest
Jul 4, 2022
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40
1
Sum
The nth term of a sequence is (n + 1)(3n + 2). What is the value of a_1 + a_2 + ... + a_{100}?
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Guest
Jul 4, 2022
0
36
0
Analytic Geometry
The vertices of a triangle are the points of intersection of the line y = -x-1, the line x=2, and y = 5x + 3. Find an equation of the circle passing through all three vertices.
Guest
Jul 4, 2022
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54
1
circles
A circle has a circumference of 28 centimeters. If an arc subtends a central angle of 55 degrees, what is the arc length?
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Guest
Jul 4, 2022
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60
1
Rectangles
A sheet of 8-inch by 10-inch paper is placed on top of a sheet of 8-inch by 11-inch paper, as shown. What is the area of the region of overlap in square inches?
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Guest
Jul 4, 2022
0
57
1
circles
In the diagram, K, O and M are the centers of the three semi-circles. Also, OC = 32 and OM = 36. What is the length of AC?
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Guest
Jul 4, 2022
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51
1
angles
The complement of angle M is 10 degrees. What is the measure, in degrees, of the supplement of angle M?
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Guest
Jul 4, 2022
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50
1
angles
If PQ is a straight line, what is the value of x?
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Guest
Jul 4, 2022
0
54
1
help geometry
Square A has side lengths each measuring x inches. Square B has side lengths each measuring 2x inches. What is the ratio of the area of the smaller square to the area of the larger square? Express your answer as a common fraction.
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Guest
Jul 4, 2022
0
57
1
help geometry
In the diagram, each circle is divided into two equal areas and O is the center of the larger circle. The area of the larger circle is 64*pi. What is the total area of the shaded regions?
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Guest
Jul 4, 2022
+9
59
1
+1132
pls helllllp
A positive integer n is nice if there is a positive integer m with exactly four positive divisors (including 1 and m) such that the sum of the four divisors is equal to n. Find the sum of all the nice numbers in the set
<
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nerdiest
Jul 4, 2022
0
55
1
Units digit
Find the units digit of 22^22*11^11
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Guest
Jul 4, 2022
+9
72
2
+1132
Pls help. Appreciated.
The mural of your school mascot is 4 feet by 12 feet and is to be completely framed using a single row of square tiles each 2 inches on an edge. If the tiles are $0.10 each, find the cost, in dollars, of the tiles needed to frame the mural.
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nerdiest
Jul 4, 2022
0
65
2
+6
Let $a,$ $b,$ $c,$ $x,$ $y,$ $z$ be nonzero complex numbers such that
Let $a,$ $b,$ $c,$ $x,$ $y,$ $z$ be nonzero complex numbers such that
\[a = \frac{b + c}{x - 2}, \quad b = \frac{a + c}{y - 2}, \quad c = \frac{a + b}{z - 2},\]and $xy + xz + yz = 5$ and $x + y + z = 3,$ find $xyz.$
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Quadro
Jul 4, 2022
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37
0
quadratic
Find all ordered pairs of real numbers (x,y) such that x^2 + 4x + y^2 + 6y + 13 = 0
Guest
Jul 4, 2022
0
35
0
help number theory
If a, b, c are positive integers less than 13 such that
2ab + bc + ca = 0 (mod 13)
ab + 2bc + ca = 8abc (mod 13)
ab + bc + 2ca = 6abc (mod 13)
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Guest
Jul 4, 2022
0
32
0
probability
Jeff will pick a card at random from ten cards numbered 1 through 10. The number on this card will indicate his starting point on the number line shown below. He will then spin the fair spinner shown below (which has three congruent sectors) and follow
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Guest
Jul 4, 2022
0
37
0
simplify
Simplify $\frac{2\sqrt[3]{9}}{1+\sqrt[3]{3}}$
Guest
Jul 4, 2022
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