All Questions ⁺⁰237690 Questions

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181

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HELP PLS CPHIL MELODY ANYONE!!

For non-negative integers a and b, where a and b are both greater than or equal to 2, simplify the following:

Guest Mar 3, 2023

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186

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Probability

Need help with probability

My sock drawer contains two red socks, two white socks, and two blue socks. For three days in a row, I pull out two socks out of my sock drawer at random. What is the probability that I get matching read more ..

Guest Mar 3, 2023

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141

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Geometry

Let ABC be a right triangle, and let H be the point on side AB so that CH is perpendicular to AB. Prove that (x + h)^2*(y + h)^2 = (a + b)^4.

Guest Mar 3, 2023

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180

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HELP CPHIL OR MELODY OR ANYONE

Fill in the blanks to make the equation true. (Each blank should contain an integer.)

C(n,k) = ____ * C(n-2, k-2) + _____ * C(n-2, k-1) + _____ * C (n-2, k)
read more ..

Guest Mar 3, 2023

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197

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PLZ help with this

https://web2.0calc.com/questions/more-fun-with-functions

Guest Mar 3, 2023

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202

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Probability

In Ms. Q's deck of cards, every card is one of four colors (red, green, blue, and yellow), and is labeled with one of seven numbers (1, 2, 3, 4, 5, 6, and 7). Among all the cards of each color, there is exactly one card labeled with each number. The read more ..

Guest Mar 3, 2023

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Emily's family loves to work together in the garden

Emily's family loves to work together in the garden. They have a slight preference for flowers, as 60%, percent of their plants are flowers and 40%, percent are vegetables. They have 50 plants growing in the garden. How many vegetable plants do they read more ..

Guest Mar 3, 2023

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179

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Counting

A baking club wants to form an executive committee. There are people in the baking club, including mark. In how many ways can the baking club form an executive committee with people?

Guest Mar 3, 2023

Mar 2, 2023

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177

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Solve a system of equations using substitution: word problems

Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
Oscar is going to send some flowers to his wife. Greenwood Florist charges $1 per rose, plus $24 for the vase. Eric's Flowers, read more ..

Guest Mar 2, 2023

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187

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Ohno AAA!

Guest Mar 2, 2023

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192

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Counting

Sam writes down the numbers 1, 2, 3, ..., 99

(a) How many digits did Sam write, in total?
(b) Sam chooses one of the digits written down, at random. What is the probability that Sam chooses a 0? read more ..

Guest Mar 2, 2023

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152

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Help!!!!!

A x B + S + P = O + C. Can you find out(or guess) what these are?

Guest Mar 2, 2023

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161

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Coordinates

Points A, B, and C are given in the coordinate plane. There exists a point Q and a constant k such that for any point P,
PA^2 + PB^2 + PC^2 = 3PQ^2 + k
If A = , B = , and C = , then find the constant k.

Guest Mar 2, 2023

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176

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Precalc

In triangle PQT, R is on side PT such that QR = QP. Also, QS is an altitude, and QT = 10. The values of tan CBE, tan CBE, tan SQT form an arithmetic progression, and the values of cot SQT, cot RQT, cot SQR form a geometic progression. read more ..

Guest Mar 2, 2023

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161

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Probability

A box contains 24 tiles. Each tile has certain properties:
Each tile is made of wood or plastic.
Each tile is red, yellow, or blue.
Each tile is a triangle, square, pentagon, or circle.
There is exactly one tile for each combination read more ..

Guest Mar 2, 2023

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181

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Ashley made 5 identical necklaces, each having beads and a pendant. The total cost of the beads and pendants for all 5 necklaces was $19.50.

Ashley made 5 identical necklaces, each having beads and a pendant. The total cost of the beads and pendants for all 5 necklaces was $19.50. If the beads cost $2.20 for each necklace, how much did each pendant cost? read more ..

Guest Mar 2, 2023

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162

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Algebra

Find all solultions of the equation |x^2 - 30x - 1| + |x^2 - 30x + 1| = 30.

Guest Mar 2, 2023

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157

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Counting

A debate team consists of 5 freshmen and 4 sophomores. (Everyone is distinguishable.) In how many ways can they stand in line, so at least two of the sophomores are standing next to each other, and at least two of the freshmen are at the ends read more ..

Guest Mar 2, 2023

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149

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Geometry

In tetrahedron ABCO, angle AOB = angle AOC = angle BOC = 90^\circ. A cube is inscribed in the tetrahedron so that one of its vertices is at O, and the opposite vertex lies on face ABC. Let OA = 1, OB = 1, OC = 1. Show that the read more ..

Guest Mar 2, 2023

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173

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A triangle has sides with lengths of 12 inches, 15 inches, and 18 inches. Is it a right triangle?

A triangle has sides with lengths of 12 inches, 15 inches, and 18 inches. Is it a right triangle?

Guest Mar 2, 2023

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188

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your mom

Guest Mar 2, 2023

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157

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Inequality

Let a, b, and c be nonnegative real numbers. Prove that for all x >= 0,
(x + abc)^3 >= abc(x + a)(x + b)(x + c) >= (x + a + b + c)^3.

Guest Mar 2, 2023

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182

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FUNCTIONSS

A cannon ball has been catapulted through the air and follows the path created by the function f(t)= -16t^2+30t+7 where f(t) is the height of the cannonball in meters at any given time (t) in seconds.

1. What is the initial read more ..

Guest Mar 2, 2023

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