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vodomira [7]
2 years ago
12

Help? I can’t figure out this problem

Mathematics
1 answer:
monitta2 years ago
7 0

Answer:

  B

Step-by-step explanation:

Euler's formula tells you that ...

  cos(θ) +sin(θ)·i ≡ e^(i·θ)

__

So, for θ = 90° (= π/2 radians), this is ...

  cos(π/2) +sin(π/2)·i = 0 +i = i = e^(i·π/2) . . . . . matches choice B

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Olin [163]
Hello:
3x²+5x+2=0
delta = (5)²-4(3)(2)=1
x =( -5 <span>±1)/6
x= -2/3 or x=-1

t4-81=(t²)² -9² = (t²-9)(t²+9) =(t-3)(t+3)(t²+9)....(answer B)</span>
7 0
3 years ago
What is the axis of symmetry for f(x) = 2x2 − 8x 8? x = −2 x = −3 x = 3 x = 2
Tatiana [17]

<span>The first part of the quadratic formula, x = - b/2a, is the equation of the axis of symmetry, and the x-coordinate of the vertex. </span>

<span>In standard form: - 2x² + 8x - 5 = 0, a = - 2, b = 8, c = - 5 </span>

<span>The axis of symmetry: x = - 8/2(- 2) = - 8/- 4 = 2 </span>

<span>Go back and solve for y to find the y-coordinate of the vertex. </span>

<span>y = - 2(2)² + 8(2) - 5 </span>

<span>y = - 2(4) + 16 - 5 </span>

<span>y = - 8 + 16 - 5 </span>

<span>y = 3 </span>

<span>Vertex is (2, 3)</span>
7 0
3 years ago
Read 2 more answers
Here a graph of linear function write the equation that describes function
Marysya12 [62]

Answer: y = -5x+5

Step-by-step explanation: Slope intercept form is written as y = mx+b where m is the slope of the function and b is the y-intercept of the function. In this linear function, the line crosses the y-axis at (0,5). This is the y-intercept. We can find the slope with the (y2 - y1) / (x2 - x1) by choosing 2 points on the graph. I chose (0,5) and (1,0). If you use the formula, you will end up with -5 as your slope.

4 0
3 years ago
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write the equation for the transformation of the graph of y=f(x). use the form f(x)=a(x-h)+k. 13. translated 2 units left and 7
sergey [27]
13)  f(x)  =  a ( x + 2 ) - 7 

14) f(x) = 3 ( x - 5 ) + 2 
3 0
3 years ago
Someone help and plz make sure it’s right will mark brainiest
vitfil [10]

Answer:

x = 72 degrees

Step-by-step explanation:

Use the definition of a tangent function:

tan x = opposite/adjacent

= 154/50

= 3.08

----> x = arctan 3.08 = 72 degrees

4 0
3 years ago
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