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What else can I help you with?
What is 2 thirds times 21?
Multiply 21 with the numerator (2), then divide the result by the denominator (3).
What 2 numbers add to equal 21 but multiply to equal 72?
24 & 3
What is the reverse of multiply by 21?
divide by 21
What two numbers multiply to get 42?
6 / 7 2 / 21 3 / 14 1 / 42
What number is halfway between 21 and 40?
to get the answer, you multiply them both together and divide by 2. 61 divided by 2 is 30.5 30.5 is the answer.
Shannon developed a rule for generating a number sequencethe first 6 numbers are 7 21 42 126 252 756 what is shannon rule for finding the number in her sequence?
multiply by 3, then multiply by 2 and repeat
Can you draw a rectangle that has an area of 21 square units and a perimeter of 20 units?
#1 : ( 2 x a ) + ( 2 x b ) = 20 #2 : a x b = 21 #2 : a = 21 / b replace in #1 : ( 2 x 21 / b ) + ( 2 x b ) = 20 multiply by b : 42 + 2 x b2 = 20 x b => 2 x b2 - 20 x b + 42 = 0 => b1 = 7 and b2 = 3 Two solutions : b1 = 7 and a1 = 21/7 = 3 b2 = 3 and a2 = 21/3 = 7
What are binomials?
These are binomials: * means multiply (2*3) (4*8) (4*6) (x*3) (x*84) (48.5*3) How to solve> use the F.O.I.L. meathod 1) F stand for First (multiply the first number/variable in each set of parenthases to each other) 2) O stands for Outer (multiply the 2 outer most number/variables in the problem together) 3) I stands for Inner (multiply the 2 number/variable on the inside of the problem to each other) 4) L stands for Last ( -- ) ex: (3*x) (5*7) 1) 3*5=15 2) 3*7=21 3) x*5=5x 4)x*7=7X ^^ multiply the answers you got to each other in that order- you get; 15*21*5x*7x then multiply the like terms- 15*21= 315 5x*7x=35x the answer is "315*35x" -- hope this helped
Lcm of 21 and 27?
The LCM (Least Common Multiply) of 21 and 27 is: 189 GCD: 3LCM: 189189
How do you find 42 percent of 50?
Multiply 50 by 0.42 Answer is 21.
Estimating the answer to 21 x 0.69?
This depends on how accurate an estimate is required. If your answer need only be whole numbers, then 0.69 is slightly larger than 2/3 which is 0.66 = you could estimate 14 - which is 2/3 of 21. -- Alternatively, if your answer ought to be to one decimal place then you could say that it is nearly 70% and multiply 21 by 0.7 and get 14.7
How do you multiply similar fraction?
YOu can multiply any two fractions together by multiplying both numerators together to give you the numerator of the answer, and multiplying both denominators together to give you the denominator of the answer. For example: (1/2) * (2/3) = (1*2)/(2*3) = 2/6 = 1/3 Another (more complicated) example: (5/7) * (2/3) = (5*2)/(7*3) = 10/21
Does 21x m equal m x 21 for all m?
yes, the order in which you multiply the two numbers has so effect on the answer. ex: 2 x 3 = 6, 3 x 2 = 6
6x over five multiply 7 over 4x?
21/10
What two numbers multiply to equal 21 but add together equal -22?
-1
How do you know that the fraction 21 over 30 is larger than 2 over 3?
You can't accurately compare fractions if they don't have a common denominator. In other words, the bottom numbers of both fractions have to be the same. To change that, you have to find the LCD, or least common denominator (the smallest number both bottom numbers multiply evenly into.) In this case, the LCD is 30, since 3 is a factor of 30. Since 10 x 3 =30, we have to multiply the top number (or numerator) by 10 also. Here's what the process looks like: 21/30 > 2/3 (original problem) 21/30 > ?/30 (find the LCD) 21/30 > 20/30 (multiply the numerator by the same number as the denominator) 21/30 > 20/30 (final answer) So there you have it. 21 is larger than 20, therefore 21/30 is larger than 2/3.
What is a divisibility test for 7?
for 2 digits... multiply the last digit by 5, add the result to the first digit... example... 63.. (3)(5)=15 15+6=21 21 is divisible by 7, so 63 is divisible by 7...
