All Questions +0 237641 Questions

How many different triples (a,b,c) from the set {1,2,3,4,5} satisfy the equation a^2 + bc = b^2 + ac ?

Work:
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Guest Dec 29, 2020

565

i dont remmber my log 2 properties can someone help?

c=3000 log2(1+1000)

Alan ●

Guest Dec 29, 2020

648

+48

Linear Diophantine Equations

Alan ●●

TheOddOne Dec 29, 2020

571

The point A (3,4) is reflected over the x-axis to B.

The point A (3,4) is reflected over the x-axis to B. Then B is reflected over the line y=2 to C. What is the area of triangle ABC?

Two vertices of an obtuse triangle are (6,4) and (0,0). The third vertex is located on the negative branch of the x-axis. What are the coordinates of the third vertex if the area of the triangle is 80 square units?

Guest Dec 29, 2020

563

need help

Justin and Keiko walk around a track. Justin walks each lap in
10
minutes. Keiko walks each lap in read more ..

Guest Dec 29, 2020

782

Word problem involving the least common multiple of 2 numbers

Circle Gamma is the incircle of triangle ABC and is also the circumcircle of triangle XYZ. The point X is on segment BC, the point Y is on segment AB, and the point Z is on segment AC. If angle A=40 degrees,angle B=65 degrees, and angle C=75 degrees, read more ..

Guest Dec 29, 2020

437

geometry

Let $a,$ $b,$ $c$ be distinct integers, and let $\omega$ be a complex number such that $\omega^3 = 1$ and $\omega \neq 1.$ Find the smallest possible value of \[|a + b \omega + c \omega^2|.\]

Guest Dec 29, 2020

432

Halp repost

The 5*5 grid shown contains a collection of squares with sizes from 1*1 to 5*5. How many of these squares contain the black square?

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Guest Dec 29, 2020

541

counting question

In rectangle ABCD, AB = 6 and BC = 4. EF is parallel to BC, and EC = 1. Rectangle GHIJ is inscribed in rectangle AFED, such that it is similar to rectangle ABCD. Find the ratio of the area of GHIJ to the area of ABCD.
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Guest Dec 29, 2020

Dec 28, 2020

520

math problem

A teacher writes 6 consecutive integers on the blackboard. He erases one of the integers and the sum of the remaining five integers is 2016. What integer was erased?

Guest Dec 28, 2020

786

plz help with algebra

Find all numbers r for which the system of congruences
x = r (mod 6)
x = 10 (mod 20)
x = 5 (mod 45) read more ..

Guest Dec 28, 2020

590

system of congruences

On her daily homework assignments, Qinna has earned the maximum score of $10$ on $15$ out of $40$ days. The mode of her $40$ scores is $7$ and her median score is $9$. What is the least that her arithmetic mean could be? Express your answer as a decimal read more ..

Guest Dec 28, 2020

656

+82

HELPPPPP

Leafie Dec 28, 2020

546

FInd the number of odd divisors of 10!

If two distinct members of the set\{ 2, 4, 12, 14, 21, 28, 98 \} are randomly selected and multiplied, what is the probability that the product is a multiple of 16? Express your answer as a common fraction.

Guest Dec 28, 2020

518

probability

$P(x)$ is a polynomial with real coefficients such that $P(2+i)=4-3i$. There is a linear function $Q(x)=ax+b$ with real coefficients such that $Q(2+i)=P(2+i)$. Find $Q(x)$.

Guest Dec 28, 2020

528

need some help

Alan ●

Guest Dec 28, 2020

553

please help

The △AOB consists of point A=(0,1), point O=(0,0), and point B lying somewhere on the x-axis. Let P be the point in the first quadrant such that AP = PB and AO parallel to PB, as shown above. If the length read more ..

Find the constant term in the expansion of (10x^3 - 1/(2x))^4.

Guest Dec 28, 2020

639

algebra

cryptoaops ●●●

Guest Dec 28, 2020

397

counting question

X1 X2 X3 ....X9 are nine points on the circumference of circle . How many triangles be drawn using these points as vertices?

BCD and EFG are equilateral triangles, and B, C, D, F, and G lie on the same circle. Let R_1 be the circumradius of BCD, and let R_2 be the cirucmradius of EFG. Find R_2/R_1.

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Guest Dec 28, 2020

513

help with triangle geometry

Two circles of radius $r$ are externally tangent to each other and internally tangent to the ellipse $x^2 + 5y^2 = 6,$ as shown below. Find $r.$ read more ..

Guest Dec 28, 2020

537

Pls help with conic sections

Guest Dec 28, 2020

-2

438

+12

not a math question

how is 1+1 a window

off-topic

For how many different digits is the two-digit number divisible by ? (The expression should be interpreted as a two-digit integer with tens digit 6 and units digit , not as 6 times .)

nuclear0wl Dec 28, 2020

1004

+122

Please help me!