用戶48836

prove that a + b ≤ |a| + |b|?

Factor Theorem problem?

surd qns, hopefully can seek help help?

why is 110 divisible by 10?

In how many different ways can 7 boys and 7 girls be seated alternatively in a row from left to right?

A,B is square matrices of the order n. Prove that if A and B are skew symmetric, and AB+BA = 0 then AB is also skew symmetric?

Are these statements true or false (Mathematics) ?

Simplify sin(x/2)-cos(x/2)=1?

Two balls are drawn simultaneously at random; 6 red, 4 white & 5 blues. What is P(one is white and one is red)?

The mean rent of an apartment is $780. You randomly select 9 apartments. Compute the probability that the mean rent is less than $825.?

Can you solve this logartihm problem?

Make F the subject. C=5 (F-32)/9 give answer in form aC+b/c where a,b,c are all positive integers.help?

Can you solve these math problems?

is 1/x-y the same thing as 1/x - 1/y?

An airplane flies at 800km/h for one-third of its flight and averages 700km/h for the rest. What is the average speed, in km? Show working?

remainder when 2 to the power of 220 is divided by 7. Please show simple step by step working that a twelve year old would understand,thanks?

Any Help ??? George is loading freight into an elevator. He notices that the weight limit is 1000 lbs. He knows that he weighs 210 lbs.?

F varies jointly as q1 and q2 and inversely as the square of d. if F =45 when q1 = 15, q2=15, and d=5, find F when q1=8, q2=4, and d=4?

Math trouble help 9/x+5 - 6/ x-5?

Can you only do trigonometry with right triangles? Or can you do it with other types of triangles as well?

Algebra 2.?

The error function, erf(x), is defined by the following?

Am I screwed for calc 1?

5600/((pi*d^2)/4)=15000 for d show steps please?

Maths answer?

16^(x+2) = 8^-x? Solve for x?

Does this series converge or diverge? I know 1 diverges, but what about 0; my guts are telling me it converges.?

probability question?

How many inches is 1080x1920px?

Maths help, thanks?

is the number 3 still relevant?

Find the value of x, x^15 = 32768.. Please help?

How do I find the maximum area of the rectangle?

a bag has 5 red marbles, 6 blue marbles, and 4 black marbles.?

Math word problem help?

Discriminant of 2x2-4x-6=0?

SAT question?

Will the determinant of a matrix with zeros in diagonal always be zero even after row operations?

Please help an idiot?

A fellow classmate mistakenly thinks that cos(45°) = 0.5 and sin(45°) = 0.5. Explain why he might think this and why it is not possible.?

Use the midpoint formula to determine the midpoint of the segment with endpoints A(-5, 12) and B(-8, 5).?

Write the equation of the line that goes through the point (-4, 5) and is perpendicular to the given line: y = 4x - 1.?

integrate e^(-3x) tan(e^(-3x)) dx?

If A is proportional to sinθ (0<θ<π/2) , then is A also proportional to θ ? Thanks!!!?

What maths is involved in cryptography?

Easy algebra 1 word problem that I don't get please help?

Use a double-angle formula to rewrite the expression. 14 sin^2 x − 7?

A man is 6 feet 2 inches tall. To find the height of a tree, the shadow of the man and the shadow of the tree were measured.?

Hello, How can I factor this: 3x^2+16x+5 I tried several times, but still no solution! Thank you?

INTEGRATE 9^x...?