All Questions ⁺⁰237689 Questions

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168

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Counting

Find the number of six-digit numbers, where the sum of the digits is divisible by 8.

Guest Mar 6, 2023

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160

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+62

Let a and b be the roots of 7x^2 - x - 3 = 0. Find (1 + a + a^2 + a^3 + ...)(1 + b + b^2 + b^3 +...)

please help, I am struggling with questions involving big and scary sequences.

Tacoflea Mar 6, 2023

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181

1

Exponential functions

Plz help with this

Select all the correct statements. (For this problem, we assume that an exponential function is of the form ka^x where a > 0)
read more ..

Guest Mar 6, 2023

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186

2

Probability

I need to compute probability

A member of the junior varsity swim team will be elected as President. Each member is equally likely to be elected. The probability that a sophomore is elected is the probability read more ..

Guest Mar 6, 2023

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192

1

Question content area top

Question content area top
Part 1
By air, the distance from city A to city B is
3004 read more ..

Guest Mar 6, 2023

+1

185

1

Counting

Help I need to count this

Catherine rolls a standard 6-sided die five times, and the product of her rolls is . How many different sequences of rolls could there have been? (The order of the rolls matters.)

Guest Mar 6, 2023

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186

1

Probability

I don't think this problem is that hard, but I can't get it.

A standard six-sided die is rolled twice. What is the probability that the product of the rolls is 1, 2, or 3?

Guest Mar 6, 2023

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166

1

Counting

You are given the 4 x 4 grid below.

(a) Find the number of ways of placing 8 counters in the squares (at most one counter per square), so that each row contains exactly two counters.
read more ..

Guest Mar 6, 2023

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157

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Counting

Help with grid

Each unit square of the 4 x 4 grid below is to be filled in with the number 1, 2, 3 or 4 so that read more ..

Guest Mar 6, 2023

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183

1

Counting

Plz anyone help with counting

(a) Find the number of ways that Magnus can give out 20 identical stickers to 5 of his friends. (Not everyone has to get a sticker.)
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Guest Mar 6, 2023

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158

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Geometry

How do you do triangle stuff

Triangle ABC is a right triangle with angle BAC= 90 degrees and angle B > angle . Suppose AP is an altitude of the triangle, AQ is an angle bisector of the triangle, and AR is a median read more ..

Guest Mar 6, 2023

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191

1

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 6, 2023

+1

172

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+13

help with math

A restaurant plans to use a new food delivery service. The food delivery service charges $5.92 for every 2 meals delivered, plus a $2.50 service fee. What is the slope of this situation?
5.92
5.46 read more ..

mellyrules33 Mar 6, 2023

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151

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Geometry

Help with parallelogram

In the diagram below, PQRS is a parallelogram with a perimeter of 26 and an area of 28. What is the perimeter of rectangle OSTQ? Include an explanation of how you solved the problem.
<read more ..

Guest Mar 6, 2023

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173

1

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 6, 2023

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152

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Geometry

In triangle PQR, let M be the midpoint of QR, let N be the midpoint of PR, and let O be the intersection of QN and RM, as shown. If QN perp PR, QN = 12, and PR = 14, then find the area of triangle PQR.

Guest Mar 6, 2023

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179

1

Counting

In how many ways can 4 balls be placed in boxes if neither the balls are indistinguishable, and the boxes are distinguishable?

Guest Mar 6, 2023

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217

3

Funky figures

The center of a circle is at a vertex of an equilateral triangle as shown. If the area of the circle and the equilateral triangle are both 10, what is the combined area of the two gray regions?
read more ..

Guest Mar 6, 2023

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182

1

Gilbert's employer matches 12% of gilbert's contributions to his 401(k) plan.

Gilbert's employer matches 12% of gilbert's contributions to his 401(k) plan. If Gilbert's employer contributed 600$ to the plan last year, how much did gilbert's contribute to the plan last year?

Guest Mar 6, 2023

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153

0

Counting

In how many ways can 4 balls be placed in boxes if the balls are distinguishable, and the boxes are indistinguishable?

Guest Mar 6, 2023

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182

1

Probability

In the SuperLottery, three balls are drawn (at random, without replacement) from white balls numbered from 1 to 12, and one SuperBall is drawn (at random) from red balls numbered from 13 to 20. When you buy a ticket, you choose three numbers from 1 to 12, read more ..

Guest Mar 6, 2023

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163

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Function

For a certain function f(n), the identity
(2n)/n - (2n)/(n + 1) = f(n) (2n)/n
for all nonnegative integers n. Find f(n).

Guest Mar 6, 2023

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179

1

math problem

The figure shows a blueprint of a dining room, kitchen, and living room. Each square has a side length of 1/5 inch. Hardwood floors cost $15 per square foot. What is the cost of hardwood flooring for the kitchen?

Guest Mar 6, 2023

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160

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Byan is paid $32 per hour and works 8 hour per day. He receive onepaid day off for each 16 days that he works.What is his true hourly wage?

Byan is paid $32 per hour and works 8 hour per day. He receive onepaid day off for each 16 days that he works.What is his true hourly wage?

Guest Mar 6, 2023

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