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444

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In how many positive four-digit integers that are not multiples of 1111 do the digits form an arithmetic sequence?

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Guest May 23, 2020

438

Please help with this, thank you!

Let n be a positive integer greater than or equal to 3. Let a,b be integers such that ab is invertible modulo n and . Given a+b is invertible, what is the remainder when is divided by n?

I don't understand read more ..

Guest May 23, 2020

742

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If 2x − 9y = 14 and 6x = 42 + y, what is the value of the product xy?

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Guest May 23, 2020

610

Plz help I’m so stuck

There are ten people in the Baking Club, including Mark. They choose 3 people to form an executive committee.
How many possible committees can be formed?

How many possible committees could be formed that include Mark? read more ..

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Guest May 23, 2020

465

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Amanda has a 2-cm rod, a 5-cm rod and a 9-cm rod. She will randomly choose a fourth rod from a box containing rods of lengths 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20 cm. What is the probability that Amanda’s four rods will be able to form a convex quadrilateral, read more ..

Guest May 23, 2020

613

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Nine points are evenly spaced on a standard number line. They are labeled A through I, from left to right. The coordinates of points A and I are 1 and 10, respectively. What is the coordinate of point B? Express your answer as a decimal to the nearest thousandth. read more ..

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Guest May 23, 2020

544

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A sequence is defined by a_{n + 1} = a_n + 2n, and a_1 = 4. What is the sum of the seventh term and eighth term?

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Guest May 23, 2020

538

please help thanks!

Together,two pipe can fill a reservoir in 3/4 of an hour Pipe 1 needs one hour and 10 minutes(1 1/6 hours) to fill the resevoir by itself. How long would pipe 2 need to fill the reservoir by itself?

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Guest May 23, 2020

595

please help

Paula is 10 less than thrice Kaye's age.Two years from now Paula's age is twice Kaye's present age.How old is Kaye now?

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Guest May 23, 2020

442

please help

The ages of Tim,Baron and Aron are consecutive integers.Tim is younger than Aron but older than Baron.Tim's mother is thrice as old as Tim and 14 years older than twice as old as Aron.Find the ages of each.

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Guest May 23, 2020

611

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The average age of the 10 females in a choir is 30 years. The average age of the 15 males in the same choir is 35 years. What is the average age, in years, of the 25 people in the choir?

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Guest May 23, 2020

658

+226

PLEASE HELP ME THANK YOU

The function satisfies
for all real numbers and Find all possible functions .

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littlemixfan May 23, 2020

730

HELP ASAP

(a) Compute the sum \[ 101^2 - 97^2 + 93^2 - 89^2 + \cdots + 5^2 - 1^2.\]
(b) Compute the sum \[ (a +(2n+1)d)^2- (a + (2n)d)^2 +(a + (2n-1)d)^2 - (a+(2n-2)d)^2 + \cdots + (a+d)^2 - a^2.\] read more ..

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Guest May 23, 2020

1056

Find an equation of the tangent to the circle x 2 + y 2 = 36 at the point (5, √ 11)

Find an equation of the tangent to the circle x2 + y2 = 36 at the point (5, √ 11)

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Guest May 23, 2020

538

Please Anwser

A ball is thrown into the air. The function that models the ball’s projection is y = −16t 2 + V t + h where V is the initial velocity and h is the initial height. a) If the ball is thrown with initial velocity 18 m/s and leaves the hand at initial height read more ..

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Guest May 23, 2020

1390

+407

Help me please ASAP

The first three towers in a sequence are shown. The n^th tower is formed by stacking n blocks on top of an n times n square of blocks. How many blocks are in the 99th tower? read more ..

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ss333 May 23, 2020

538

please help

Solve the inequality |x - 2|/|x + 3| < 7.

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Guest May 23, 2020

521

help!

Let f(x) = 1/(1 - x). Compute f(f(f(x))).

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Guest May 23, 2020

383

I need help on this.

Let n be a positive integer greater than or equal to 3. Let a,b be integers such that ab is invertible modulo n and . Given a+b is invertible, what is the remainder when is divided by n?

Guest May 23, 2020

553

help

Three circles, two with radius R and one with radius r, are drawn on the same side of a straight line in such a way that each circle is tangent to the line and both other circles. What is the relationship between R and r?

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Guest May 23, 2020

418

help

How many different ways can the faces of a tetrahedron be colored red, green, or blue? (The tetrahedron can be rotated.)

Guest May 23, 2020

2028

+44

The radius of a circle measures 5 inches.

The radius of a circle measures 5 inches. A central angle of the circle measuring 5π12 radians cuts off a sector.
What is the area of the sector?
Enter your answer, as a simplified fraction, in the box.

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jscare May 23, 2020

416

Please help!

https://web2.0calc.com/questions/please-help_79065

Im not sure if 20% is right...

Guest May 23, 2020

445

Please help mee?! :)

Jerry has a bunch of folding card tables. He is trying to plan how he will set up the table seating for a big meeting. He likes the idea of people working in 3’s but doesn’t have enough tables to use only tables of 3. Using all his tables, he can seat everyone read more ..

Guest May 23, 2020

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Find an equation of the tangent to the circle x 2 + y 2 = 36 at the point (5, √ 11)

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The radius of a circle measures 5 inches.

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