Which value for xmakes the equation 1 + = 10, true? 3 9 18 . 81
3. Find a counterexample (any value of x for which the equation is not true) to show that the equation cos(2x) = 2 cos x is not an identity. (For example, you could let x = 90° and evaluate both sides of the equation.)
Which of the following is / are true? A. x^-2-x^-1/x-1 is a rational expression. B.(9+X/9-x^2-1/3-x)(X+3/3)=(3/3-x) C. x^2+5x+6/2x^2-x-3÷2x^2+10x+12/(3-2x)(X+1)=1/2 1. Only A 2. Only B 3. Only C 4. Only B and C 5. None of them
A student makes a solution of 1.00 X 10^-7 M NaOH at 298K. Which of the following is NOT true for this solution at 25C? a) [OH-] > 1.0 X 10^-7 b) [OH-][H3O+] = 1.0 X 10^-14 c) [OH-] > [H3O] d) [OH-] = 1.0 X 10^-7 e) [OH-]/[H3O+]>1 Explain why!! Please
3. Find the value of x in the following equation: *%2 + 2x/5 = 18 A. X = 255/7 B. X = 2 C. X = 20 O D. x = 1/2
For which of the following is x = -7 not a solution. • 3x = x - 28 4 = x + 11 • 5 = -2x - 9 5x = 2x -21 . What value of x makes the equation 4x - 5 = -6x +15 true? . • 2 1 -5 . -10
1. Find the value of b that makes the equation (ye"y)dx + (very + by)dy = 0 exact, and solve. 2. We know that the first order linear equations are of the form y' + p(t)y = g(t). For which plt) the equations are exact? 3. Textbook 2.6: 7,11,13
Find the value of x that makes the equivalent annual worth in years 1 through 10 equal to $400 per year. Use an interest rate of 10% per year. The cash flows in year 0 and year 10 has an unknown value x, and 1 through 9 has an annual worth of $400
[1+1 Write a program to solve the equation y = sqrt(5 {x}^{5) + 3 {x}^{4} + 10). a) In the function, you should take the value of the integer from the user b) The value of x should be between 1 and 9. Make sure that the user has not entered a valid value. c) Calculate the value according to the formula and print it on the screen. d) The value of the output variable y should be printed only...
10r y Which ofthe flywing is equivalent 1T77 ? 2x A. 9. B. 2y 2x 3r -9x + 18 10 Which of the following is equivalent to the fraction 6-x x2-25 When is divided by , the quotient is x +5 9x A. 27x B. 3r-15 x-20 C. 12. Which ofthe following is equivalent to-li A. B.一 D. 13. Which equation represents a line that is perpendicular to the line represented by 2x-y 77 B. y=-x+6 C. y=-2x + 6...