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2 years ago

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The equation cos -1 (3.4/10)=x can be used to determine the measure of angle BAC what is the degree measure of angle BAC round t

o the nearest whole degree
My answer will be 70° is that correct

1 answer:

Sholpan [36]2 years ago

5 0

Answer:

That is correct I also got 70

Step-by-step explanation:

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You start driving north for 9 miles, turn right, and drive east for another 40 miles. At the end of driving, what is your straig

Vsevolod [243]

The straight line distance from the starting point is 41 miles.

<u>Explanation:</u>

Given:

Distance covered towards north, n = 9 miles

Distance covered towards east, e = 40 miles

Distance from the origin to the end, x = ?

If we imagine this, then the route forms a right angle triangle

where,

n is the height

e is the base

x is the hypotenuse

Using pythagoras theorm:

(x)² = (n)² + (e)²

(x)² = (9)² + (40)²

(x)² = 1681

x = 41 miles

Therefore, the straight line distance from the starting point is 41 miles.

5 0

2 years ago

The ratio x:10 is equilvalent to 9:6. What is the value of x

Troyanec [42]

Answer: x=20/3=6.67

Step-by-step explanation:

To solve proportions, the most useful way is to use [cross multiplication], where we not multiply horizontally but as diagonally.

-----------------------------------------------------------------------------

Given

x:10=9:6

Cross Multiply

9·x=6·10

9x=60

Divide 9 on both sides

9x/9=60/9

x=20/3=6.67

Hope this helps!! :)

Please let me know if you have any questions

4 0

2 years ago

Answer to question one pleaseeeee help !!

Salsk061 [2.6K]

The answer is 19.6 cm^2

you should find the height of the triangle by heron formula: it will be 9.8

so the area is
$(9.8 \times 4 ) \div 2= 39.2 \div 2 = 19.6$

good luck

8 0

2 years ago

What value of x satisfies

LenaWriter [7]

Answer:

See explanation

Step-by-step explanation:

The given trigonometric equation is $cos(90-x)=-\frac{\sqrt{3} }{3}$ .

We take the inverse cosine of both sides to get:

$90-x=cos^{-1}(-\frac{\sqrt{3} }{3})$

$90-x=125$

$x=125-90$

$x=-35\degree=325\degree$ to the nearest degree

None of the options satisfies the given equation.

But if the question is actually;

$cos(90-x)=-\frac{\sqrt{3} }{2}$

Then;

$90-x=\cos^{-1}(-\frac{\sqrt{3} }{2})$ .

$90-x=210$ .

$90-x=210$ .

$x=-120\degree$ .

Or

$x=360-120=240\degree$ .

In this case the answer will be B

5 0

2 years ago

Read 2 more answers

Estimate each product 1/5 x 24

antoniya [11.8K]

Answer:

4.8

Step-by-step explanation:

Um, I'm not sure how to explain, but watch a khan academy video on it

3 0

2 years ago