# Yahoo Web Search

1. ### find value of k for which y=6x+ k is tangent to curve y=7sqrt(x.)?

... tangent lines of form y = 6x + k have slope 6  Set slope dy/dx = 7/[2√(x)] = 6  x = 49... how that applies here  (y/7)^2 = x = (y – k )/6  6y^2 = 49y – 49k  6y^2 - 49y + 49k = 0  49*49 = 4*6*49k...

3 Answers · Science & Mathematics · 29/01/2020

2. ### Find u and v if u+4v=4i- k and 4u-v=i+j+ k .?

If you treat i, j, and k as constants, you have two variables and two unknowns that...39;s solve the first equation for u in terms of v: u + 4v = 4i - k u = 4i - k - 4v Now substitute that into the other equation and solve for v: 4u...

2 Answers · Science & Mathematics · 12/06/2020

3. ### For which value of k does the function below have only one real solution? Use the format k =.. for your response?

...would only return a single value if the sign were less than or equal to (≤) and k = -15. |4 + 7x| - 15 ≤ -15 But the inequality symbol is less than (&...

2 Answers · Science & Mathematics · 24/10/2020

4. ### For the equation | (x - 4)2 - 12 | = k to have four solutions, the value of k must be greater than 0 and less than ___ ?

You want to know the values of k that makes x have four solutions. |(x - 4)² - 12| = k ...12 = ± k Now we can add 12 to both sides: (x - 4)² = 12 ± k Get the square root of both sides (another ± gets added...

1 Answers · Science & Mathematics · 23/07/2020

5. ### Find k (0) K (2) and k (4)?

k (0) : look where x = 0 and find the y value: k (0) = 0 You can do the same for the other two.

1 Answers · Science & Mathematics · 16/09/2020

6. ### If 7 ∑ k =0 ( k −2) = 7 ∑ k =0 ( k −1)+B, then B=?

I guess {7 ∑ k =0 ( k −2)} = {7 ∑ k =0 ( k −1)+B} If it's true then B = -8

1 Answers · Science & Mathematics · 04/06/2020

7. ### A parabola y=ax^(2)+ k passes through (-1,3), (0,5) and (3,-13). Find the values of a and k ?

y = ax²+ k Since (-1,3) lies on parabola 3 = a(-1)²+ k 3 = a + k ..............(1) Since (0,5) lies on parabola 5 = a(0)²+ k 5 = k ..............(2) plug it in (1) 3 = a + 5 a = -2 a=-2 and k = 5

3 Answers · Science & Mathematics · 29/04/2020

8. ### For which of the following values of x is the equation (sin x + cos x)^2 = k true, for 1< k < 2 ?

(sin x + cos x)^2 = k sin x ^2 + cos x ^ 2 + 2*sin x * cos x = k (sin x ^2 + cos x ^ 2) + 2*sin x * cos x = k 1 + 2*sin x * cos x  = k 1 + sin 2x = k sin 2x = k - 1 let k - 1 = j find sin 2x = j where  0<...

1 Answers · Science & Mathematics · 02/08/2020

9. ### [Linear Algebra] Why is z̅ ᵏ = z̅ ᵏ  ?

Let z have form |z|cis(θ). conj(z) = |z|cis(-θ) conj(z) ᵏ = |z|ᵏcis(- k θ) ... (De Moivre) zᵏ = |zᵏ...

1 Answers · Science & Mathematics · 16/09/2020

10. ### Math help ! Consider the function K defined by K (x) = -2x^2 + 2x+4  Evaluate the following  A.) K (4) =  B.) K (4) = ?

If you are given a function: K (x) = -2x² + 2x + 4 And want to know what: K (4) is, substitute...

1 Answers · Science & Mathematics · 20/09/2020