Nov 12, 2018 · If A = [(3,2,1)(4,-1,2)(7,3,-3)],then find A-1 and hence solve the following system of equations : 3x+4y+7z = 14. 2x-y+3z = 4. x+2y-3z = 0 r 2 −3 = 12 − 9r 2 r 2 - 3 = 12 - 9 r 2. Move all terms containing r r to the left side of the equation. Tap for more steps −3+5r = 12 - 3 + 5 r = 12. Move all terms not containing r r to the right side of the equation. Tap for more steps 5r = 15 5 r = 15. Divide each term in 5r = 15 5 r = 15 by 5 5 and simplify. The 4 × 3 × 2 × 1 "cancelled out", leaving only 7 × 6 × 5. And: 7 × 6 × 5 = 210. So there are 210 different ways that 7 people could come 1 st, 2 nd and 3 rd. 1->2, 2->3, 3->1, 3->4, 4->1. Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology Zdeněk picked up 15 l of water from a 100-liter full-water barrel. Write a fraction of what part of Zdeněk's water he picked. Evaluate expression. Calculate the value of the expression z/3 - 2 z/9 + 1/6, for z = 2. more math problems ». Calculation: 4 x 3/4 - fraction calculator. The result is 3/1 = 3 = three. a) Multiply the whole number 1 by the denominator 4. Whole number 1 equally 1 * 4. b) Add the answer from the previous step 4 to the numerator 3. New numerator is 4 + 3 = 7. c) Write a previous answer (new numerator 7) over the denominator 4. One and three quarters is seven quarters. Mathematics: Input fractions. 2 1/4 + 3 1/2. The result: /2 =. LCM (4, 2) = 4. Fractions - use a forward slash to divide the numerator by the denominator, i.e., for five-hundredths, enter 5/100. If you use mixed numbers, leave a space between the whole and fraction parts. Mixed numerals (mixed numbers or fractions) keep one space between the DEmkxDP.

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