Search 75,858 tutors

## Answers by Eric Y.

Probability for 1 bar on 1 wheel                                  1/10 Probability for no bar on 1 wheel         1  - 1/10  =     9/10   When you have multiple...

The magnitude of the cross product is the area of the parallelogram with two sides A and B. First find the cross product; the answer should be a vector (x,y,z). Then change that vector into a single magnitude.

3k2 --> 3,1 49 --> 7,7   3*-7 + 1* 7 = -14   <--    -14k

Mrs. Obama says kids learn habits from everywhere, and parents shouldn't have to be responsible for everything.   Which answer did you pick for a rebuttal Daisy?   You answer first this time; I'll answer second. :)

with exponents it works as follows...     (3*4) 6 = 36*46            distribute exponents to numbers in parenthesis   (22)5 = 2(2*5)              multiply exponents when there are exponents...

Most problems in this format have you simplify by putting the radical in the numerator 2√5   5   Otherwise, if you're asking to approximate a radical... You could try to use a number close to √5 For example, 22 is 4, 32 is 9 2.32 is 5.59 2.22 is 4.84 2...

Geometric sequence is a sequence where a term is found by multiplying the previous term by a number (common ratio).   An = A1 * (k)n    k is the common ratio, and A1 is the first term   You have to find the common ratio, and then you can write the equation...

to get a1 you should use the equation and use 1 instead of n 31-2 /9  = 1/27   Keep doing that for a2 a3 a4   The common ratio a number that is multiplied to get the next term. So to find the common ratio, calculate (a2 / a1). That will be your common ratio...

2/3 + 2/9 = (6+2)/9 = 8/9 2/3 + 2/9+2/27 = (24+2)/27 = 26/27 2/3+2/9+2/27+2/81 = 80/81   1st partial sum       2/3 2nd partial sum     8/9 3rd partial sum       26/27 4th partial sum    ...

Seems like C. What do you think?

distributive property : A(B+C) = A*B + A*C   example... 2(4-3x) = 8-6x     2+ 9(2-3b) = 2+ 9*2 - 9*3b   Can you finish the calculation?

You have to write the sentences as algebra equations solve the equations   x+y = 65 2x-y = 5

Your first answer is correct. I think factoring out these types of problems is mostly guess and check   ax2+bx+c Get factor pairs from a and factor pairs from c, and try to pair them together to get b   1. x^2 + x - 6 a: 1,1 c:1,6 or 2,3...

You have to write an equation with a variable and solve it   let x = number of quarters x+26 = number of nickels   number of quarters times .25 plus number of nickels times .05 is 6.40   .25x + .05*(x+26) = 6.40

The most straightforward way is probably to solve for p or q in the linear equation and then substitute into the first equation. p = (-1-7q )/5   (-1-7q)2-7q2= 29 49q2+14q+1-7q2=29 42q2+14q-28 = 0   That looks like an equation you can deal with....

you can always make the equation equal to zero...   lets try completing the square   x2- 4x - 91 = 7   x2-4x = 98 x2 -4x +4 = 98+4    (to complete the square, divide the x term by 2, and square it)          ...

Have you learned this thing yet... 1s22s22p63s23p64s23d10 ...   This is the order in which electrons get filled. The big number in front represents the energy level. The exponent represents how many electrons fit into each place. Mg has 12 electrons so. 1s22s22p63s2 2+2+6+2...

Jim's answer regarding f=ma is applicable. Keep in mind that the equation f=ma works in the presence of gravity too. The net force f includes the force of gravity as well as the force the astronaut applies. So, to lift an object in the presence of gravity, the astronaut must overcome the...

Force = mass * acceleration F = ma   (A) a = F/m =100/50 = 2m/s2 This means every second, the velocity increases by 2m/s   (B) The velocity is increasing by 2m/s every second and starts at 0.   v = a*t 10 = 2*t t = 5 seconds

Alice Springs is landlocked in the middle of Australia. Portland Oregon is along the Pacific Ocean. The specific heat of water is very high. The specific heat of land is lower. This means it takes more heat/energy to change the temperature of water. In other words, the temperature of water...