UMEUGO EMMANUEL EBUKA

# UMEUGO EMMANUEL EBUKA

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Articles :
26

Since :
23/02/2018

Category :
Entrepreneurship

### Articles to discover

SIMULTANEOUS EQUATION1. Solve the following simultaneous equation2x + 5y = 6½5x – 2y = 9(A)2, ½ (B)2, 3 (C) ½ ,3 (D)-2, ½Solution Using Casio fx-991MS[ON] [MODE] [MODE] [MODE] [1] [2] contd2x + 5y = 6½ a1 + b1 = c15x – 2y = 9 a2 + b2 = C2Where a1=2, b1=5, c1=6½, a2=5, b2=-2 c2=9Contd [2] [=] [5] [=] [6] [a b /c] [1] [a b /c] [2] [=] [(-)]

Addition of Complex Number (1). Simplify the complex number (7 + 5i) + (3 - 2i) (a). 10 + 3i (b). 9 + 5i (c). 6 + 3i Solution Using Casio fx991es [ON] [MODE] [2] [(] [7] [+] [5] [i] [)] [+] [(] [3] [-] [2] [i] [=] Therefore Option A is correct. (2). Express in a+bi form the complex number Z1 + Z2, If Z1 = (7 + 2i) and Z2 = (3 - 2i) (a). 10 (b). 5 (

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INDICES (1). Simplify 125^-1/3 × 49^-1/2 × 10^0 (A) 350 (B) 35 (C) 1/ 35 (D) 1 /350 Solution :-Using “CASIO fx -991MS /570MS ” When raising a negative fraction to the power put brackets to avoid errors when using the calculator i.e. 125(-1/3) except it is a positive whole number [ON] [1] [2] [5] [^] [(] [(-)] [1] [a b /c] [3] [)] [X] [4] [9]

How to Solve Permutation and Combination Using Casio fx991es

(1). Evaluate 5P3 (a). 60 (b). 30 (c). 20 Solution Using Casio fx991es [ON] [5] [SHIFT] [nPr] [3] [=] Therefore Option A is correct. (2). Evaluate 5P3 + 6P2 (a). 90 (b). 40 (c). 20 Solution Use Casio fx991es [ON] [5] [SHIFT] [nPr] [3] [+] [6] [SHIFT] [nPr] [2] [=] Therefore Option A is correct. (3). If nP2 = 30 find n (a). 6 (b). 3 (c). 2 In this c

GROUPED DATA (1). The table shows the weekly profit in naira from a mini market Weekly(profit) 1, 10, 11, 20, 21, 30, 31, 40, 41, 50, 51, 60 - - - - - - - - - - - - frequency 6, 6, 12, 11, 10, 5 Find the mean (x) (A) 30.1 (B)31.0 (C) 31.1 (D) 31.2 Find the variance (A) 220.64 (B) 220.62 (C) 198.64 (D) 221.64 Find the standard deviation (A) 14.85 (B

(1). Simplify 3√45 – 12√5 + 16√20(A) 29√5 (B) 14√15 (C) 12√15 (D) 11√5Solution:-Using CASIO fx-991MS calculator[ON] [3] [√] [4] [5] [-] [1] [2] [√] [5] [+] [1] [6] [√] [2] [0] [=] (64.84597135)If option A,B,C,D gives 64.84597135 it is correct but if it doesn’t it is wrongChecking option (A) 29√5[AC] [2] [9] [√] [5] [=] (

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(1). Solve the equation 9^8 ÷ 9^5 (a). 9^3 (b). 9^2 (c). 9^5 (NB: ^ is raise to power, ◼/◻ is fraction symbol, × is multiplication sign ) Solution Using Casio fx991es [ON] [9] [HEX] [8] [➡] [÷] [9] [HEX] [5] [=] Answer gives 729 and if any option gives 729 it is correct. Checking Option A Solution Using Casio fx991es [ON] [9] [HEX] [3] [=]

OR GATE (1). Find the output of the OR gate when the inputs are A= 1100 B= 1010 (a). 1110 (b). 0101 (c). 10011 Solution Using Casio fx991es [ON] [MODE] [4] [LOG] [1] [1] [0] [0] [SHIFT] [3] [2] [1] [0] [1] [0] [=] Therefore Option A is correct. AND GATE (2). Find the output of the AND GATE when the inputs are A= 1100 B= 1010 (a). 1000 (b). 1100 (c)