All Questions ⁺⁰237641 Questions

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871

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Another question about matrices

A and B are matrices that can be multiplied together.
When does AB=BA
This is of course ignore the basic, A or B = O, AB= O, A or B = I (identical matrix), and AB = I.
read more ..

Guest Jul 21, 2017

0

818

2

Question about matrixes

P and A are 2x2 matrices.

Is the following true?
P-1AP = APP-1 read more ..

Guest Jul 21, 2017

0

928

2

simplify this expression?

(the answer has to be in positive exponents)

Guest Jul 21, 2017

0

749

0

calculate the missing dimensions of each of the following

1) a right cone has a surface area 12 m^2 and radius 1.3 m
2) the square base of a right pyramid has area 2304 cm^2 and surface area 6144 cm^2
3) a sphere has surface area 385 cm^2

Guest Jul 21, 2017

0

625

0

0.554^3 mm^3

Guest Jul 21, 2017

0

844

1

finding length of an unknown side of a frame?

how should I solve b? i already solved a and got 1:2
the dimensions of the photo irl is 1.6in by 1.875in (the photo was on my textbook, so it read more ..

Guest Jul 21, 2017

0

1624

2

The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?

The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?

Guest Jul 21, 2017

0

1232

1

determining integral values?

determine ALL integral values of k so that each trinomial can be factored:

1) x^2 + kx - 9
read more ..

Guest Jul 21, 2017

0

1636

1

finding the dimensions of a cube with a hole?

a cube has a square hole all the way through it. if the volume of wood used to construct the cube is 3072 mm^3, what are the dimensions of the cube and the hole?

read more ..

Guest Jul 21, 2017

0

1094

3

+30

what is math

what is math? joking! notreally. idek anymore

off-topic

TheBestAquamarine Jul 21, 2017

Jul 20, 2017

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2340

2

How many terms of the arithmetic sequence 88, 85, 82, . . . appear before the number -17 appears?

How many terms of the arithmetic sequence 88, 85, 82, . . . appear before the number -17 appears?

Guest Jul 20, 2017

0

923

2

Help Me Pls!!!

Guest Jul 20, 2017

0

1120

4

My exponent of 10

Hello, I don't understand when I calculate .006708 to the 180, answer is zero.

hectictar ●●●●

Guest Jul 20, 2017

0

789

1

how do you no awnser:

I have 222x222 and I gave my firend 298 how do I have left anwser: a.500 b.900 c.300 d.48,986

Guest Jul 20, 2017

0

1205

2

+99

MATHCOUNTS Problem

There is at least one two-digit number such that when it is added to the two-digit number having the same digits in reverse order, the sum is a perfect square. Find the sum of all such two-digit numbers.

benjamingu22 Jul 20, 2017

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1256

4

creating a rational exponent equation??

household smoke detectors contain 200 ug of a radioactive element that has a half-life of 432 years. to the nearest 10 ug, how much of this element will remain in a smoke detector after 20 years?

Guest Jul 20, 2017

+1

3749

1

+77

triangles

In $\triangle ABC$, we have $AB = AC = 13$ and $BC = 10$. Let $M$ be the midpoint of $\overline{AB}$ and $N$ be on $\overline{BC}$ such that $\overline{AN}$ is an altitude of $\triangle ABC$. If $\overline{AN}$ and $\overline{CM}$ intersect at $X$, then read more ..

eileenthecoolbean Jul 20, 2017

0

731

1

Prime or composite?

How to determine if the following number is prime or composite? [7^79*11^61 *3^103] + 2
Thank you.

Guest Jul 20, 2017

0

823

2

Series expansion

Please expand the following at x = 0: sqrt(1 + x)^ -1. Thank you for help.

Guest Jul 20, 2017

0

1139

4

helpppp!!! 6q^2 - 7qr - 24r^2 ?????

helpppp!!! 6q^2 - 7qr - 24r^2

Guest Jul 20, 2017

0

918

2

hard maths trick

can you solve it??? a+b= a= 1/2+1/4+1/6+1/8+1/10+1/12.....+1/120 b= 1/1+1/2+1/3+1/4+1/6....=1/60:2 can u find the trick????

Guest Jul 20, 2017

0

762

1

Compound Value of an Annuity

you need $66132 at the end of twenty years. yo know that the best you can do is to make equal payments into a bank account on which you can earn 5% of interest annually. what amount must you plan to pay annually to achieve your objective?

Guest Jul 20, 2017

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