7 doesn't have an easy test. But when I see that 291 is made up of 280 + 11, I know that 7 is not a factor.
12Y + 9 all I can see to factor out is 3 3(4Y + 3)
To factor this particular expression, just look to see what factors both values share. In this case, 2 is the only factor shared. Using the distributive method, factoring out 2 works like this: a2 - c2 (usually written 2a - 2c) = 2 * (a-c) So the factors are 2 and (a-c).
x2-14x+24=(x-12)(x-2) Since there are no options listed in this question ;), the answer could be either "x-12" or "x-2". How to factor a trinomial: see link.
A relation ~ is symmetric ifX ~ Y if and only if Y ~ X.This may seem trivial, but it is easy to see that "is less than" or "is a factor of" are not symmetric.
Factors aremultiplicativeterms (i.e., they multiply into all the terms). The easiest way to see this is by example.Example 1:a(b+cd)a is a factor and (b+cd) is a factorExample 2:x2 - 9 = (x-3)(x+3)(x-3) is a factor and (x+3) is a factorHopefully you are beginning to notice you can always wrap parenthesis around a factor without altering the order of operations.Example 3:2a(b)(9n-x)+8This is a trick one, but you can factor out a 2:2a(b)(9n-x)+8 = (1)(2)a(b)(9n-x)+(4)(2) = (2)(ab(9n-x)+4)The factors are: 2 and (ab(9n-x)+4)Example 4:If that +8 wasn't on example 3, what would the factors be?2a(b)(9n-x)They would be:2, a, b, and (9n-x)
There isn't an easy test for 7. You have to divide it. 7 is not a factor of 291.
Divide it. It isn't.
Divide 291 by 7 and see if you get a whole number or is there a remainder. If it is not a whole number, then it is not a factor. 7 goes into 291 41 times with a remainder of 4, so it is not a factor.
I would divide it. It doesn't come out even. It's not a factor.
No. If you divide 291 by 12 you will see that it does not go in 291 an exact number of times.
Divide 7 into 291. If it comes out evenly, it's a factor. It doesn't, so it's not.
Divide 7 into 29. If the answer is an integer with no remainder, it's a factor.
There is no trick to find out easily if 7 is a factor of a given number, like 291. There are easy rules for finding out if 3 is a factor of a given number (adding up the digits, again and again until you have a single digit and then see if the single digit is a multiple of 3 or not: 291 includes digits 2, 9, 1 2 + 9 + 1 = 12 1 + 2 = 3 3 is a multiple of 3, so 291 is a multiple of 3. Indeed 291 = 3 x 97).For 7, the only was is to work out the division directly and see if there is any remainder or not: 291 / 7 = 41 remainder 4 thus 291 is not a multiple of 7, which is the same as saying that 7 is not a factor of 291.----------Actually there is a way to find whether a number has a factor of 7. It is discussed in Arthur Benjamin's "Secrets of Mental Math" Book, mental division, page 100. It states:Add or substract multiples of 7 to leave the last digit position as zero, then eliminate and continue until nothing is left.Example with 52925292 ends in 2, 6X7 42, substract 425292 -42 5250, eliminate the zero525, ends in 5 7x5 35, substract525-35490, eliminate the zero.49, which we know is a multiple of 7 (7^2). > 5292 is a multiple of 7.Another example16184, ends in 4, substract 1416170>1617 ends in 7, you can also add up to zero. Add 631680 >168, ends in 8, substract 28140> 14 which is divisible by 7. This number has a factor of 7.291 , last digit is one, 3x7 21, substract.291 - 21 250 > 25 which is not a multiple of 7. > 291 does not have a factor of 7.
A 2 x 2 experimental design involves manipulating 2 factors that you are interested in, with 2 levels of each variable. For example, you may want to see the effects of both level of caffeine (factor 1) and difficulty of test (factor 2) on test performance. Thus, for factor 1 - caffeine level, you may have high amount of caffeine (factor 1 level 1), and low amount of caffeine (factor 1 level 2). For factor 2 - difficulty of test, you may have a difficult test (factor 2 level 1), and an easy test (factor 2 level 2). Then you randomly assign individuals to one of the four conditions in your experiment. In this example case the conditions would be: 1. Low caffeine, difficult test 2. High caffeine, difficult test 3. Low caffeine, easy test 4. High caffeine, easy test Then, to analyze your data, you would conduct a factorial ANOVA using SPSS or by hand if you so desire.
The ISBN of As I See It is 978-81-291-1876-9.
One physical factor that influences desert formation is low precipitation levels. Deserts typically receive very little rainfall, which inhibits the growth of most vegetation and leads to arid conditions. Temperature also plays a role in desert formation, as high temperatures can increase evaporation rates and contribute to aridity.
Factor trees are useful when you need to see the factors of a number. It is sometimes easier to see everything spread out.