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Answers by Eric Y.

Probability (answer)

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...

use laws of exponents to simplify (answer)

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...

How do you divide this without a calculator? (answer)

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...

Given the geometric sequence, find an explicit formula (answer)

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...

Find the common ratio (answer)

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...

what are the partial sums of the sequence (answer)

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    ...

factoring polynomials (answer)

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...

simultaneous equation one linear and one quadratic (answer)

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....

Earth Science c/o Atoms (answer)

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...

climate questions (answer)

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...