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alexira [117]
2 years ago
15

If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis

Mathematics
1 answer:
ruslelena [56]2 years ago
4 0

Answer:

draw a right angle triangle

Step-by-step explanation:

Let one of the angles be A  

cos A = sin (90-A)  

90 - x - 20 = x  

2x = 70  

x = 35 degrees

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Find the slope of the line that passes through each pair of points.
kotegsom [21]
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2 years ago
For a parabola with a minimum point at (3,-1), determine the equation for the function's axis of symmetry
algol [13]

Answer:

x=3

(Do not write a character less than what I have written; 3 is not the answer but x=3 is the answer.)

Step-by-step explanation:

Parabolas have a axis of symmetry; this is the line they are symmetrical about.  

The line of symmetry will always go through the vertex.

Since your question says it is a function the line will be vertical and will be of the form x=a number.

The number is determine by the x-coordinate of the vertex.

I know the vertex of your problem is (3,-1) because it says that is the minimum point of the graph.  The vertex of a parabola will always be it's maximum (this parabola is open down) or minimum (this parabola is open up).

So the axis of symmetry is just:

x=3.

You must actually write x=3.

3 is not the answer.

x=3 is the answer.

Little note down here:

(If it had said the parabola wasn't a function, the axis of symmetry would have been horizontal and therefore of the form y=a number where the number was the y-coordinate of the vertex.)

8 0
3 years ago
Read 2 more answers
Hi can someone help me with this its due tommorow!!!
bulgar [2K]

Answer:

1/12

Step-by-step explanation:

Is the answer I'm bro

4 0
3 years ago
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What is the distance between the two points shown below?
Mkey [24]

Answer:

distance =  \sqrt{ {( - 3 - ( - 3))}^{2}  +  {(4 - 0)}^{2} }  \\  =  \sqrt{16}  \\  = 4 \: units

5 0
2 years ago
With a 5% sale discount, the price of an item is $38.00. What was the original price?
tresset_1 [31]

Answer:40

Step-by-step explanation:

1)38/x=95/100

2)cross multiply: 3800=95x

3)divide each side by 95 (3800/95 and 95x/95)

4)simplify to get the answer

7 0
2 years ago
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