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Earn +20 ptsQ: What is 5 x 21 using place-value?
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What is the LCM of 15 and 21 using prime factorization?
3 x 5 = 15 3 x 7 = 21 3 x 5 x 7 = 105, the LCM
What is the equation whose solutions are x equals 2 over 3 and x equals 5 over 7 showing work?
x-2/3 = 0x - 5/7 = 0(x-2/3)(x-5/7) = 0x^2 -2/3(x) -5/7(x) + 10/21 = 0x^2 -14/21(x) - 15/21(x) +10/21 = 0x^2 -29/21(x) +10/21 = 0Another Answer:-If: x = 2/3 and x = 5/7Then: (3x-2)(7x-5) = 0Multiplying out the brackets: 21x2-29x+10 = 0 which is the equation.Check using the quadratic equation formula: x = 2/3 and x = 5/7
What are the prime factorization of 90 using exponents?
90 = 21 x 32 x 51
What is the prime factoriztion of 130 using exponents?
2 x 5 x 13 = 130. You can write that as 21 x 51 x 131 = 1301 but it's not necessary.
What is the value of x when x 2 plus 5 21?
maybe eight 21 - 5 = 16 = 2 x 8
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