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julsineya [31]
3 years ago
10

Does anyone know this answer to this questions

Mathematics
1 answer:
7nadin3 [17]3 years ago
4 0

ANSWER

-4.0

EXPLANATION

The given trigonometric equation is

\tan \: 45 \degree - 10 \:  \cos \: 60 \degree

From special angles or using the unit circle.

\tan \: 45 \degree  = 1

\cos \: 60 \degree =  \frac{1}{2}

We make the substitution to get:

1 - 10 ( \frac{1}{2} ))

This simplifies to:

1 - 5 =  - 4

Hence the correct answer is -4.0

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Create a word problem on Algebraic Expressions and Measurement (grade 10)​
mrs_skeptik [129]

Frank can build a fence in twice the time it would take Sandy. Working together, they can build it in 7 hours. How long will it take each of them to do it alone?

Answer

If Frank and Sandy can build the fence in 7 hours, they must be building

1

7

of the fence every hour.

Now, let the amount of time it takes Sandy be

x

hours so that Frank takes

2

x

hours. Sandy can build

1

x

of the fence every hour and Frank can build

1

2

x

of the fence every hour.

We now have the following equation to solve.

1

x

+

1

2

x

=

1

7

2

+

1

2

x

=

1

7

21

=

2

x

x

=

21

2

=

10.50

Thus, Sandy takes

10.50

hours and Frank takes

21

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2 years ago
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Answer:

Step-by-step explanation:

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37/10 *7

259/10

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