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3 years ago

The melting point of each of 16 samples what value of n is necessary

Mathematics

1 answer:

zheka24 [161]3 years ago

3 0

N must be equal to one

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Two cyclists are 7 miles apart when they begin biking away from each other in opposite directions. The speed of the first cyclis

koban [17]

Answer:

The distance covered by the second cyclist in 45 minutes is (3/4·b + 9) miles

Step-by-step explanation:

The given parameters are;

The distance between the two cyclist when they begin biking away from each other = 7 miles

The first cyclist's speed = 12 miles per hour

The second cyclist's speed = 12 + b miles per hour

Therefore, we have;

The equation for distance covered, d = Speed × Time

The distance covered by the second cyclist in 45 minutes, $d_{45 \ minutes}$ is given as follows;

45 minutes = 3/4 hour

$d_{45 \ minutes}$ = (12 + b) × 3/4 = (3/4·b + 9) miles

The distance covered by the second cyclist in 45 minutes = (3/4·b + 9) miles.

6 0

2 years ago

Help me please and fast need it done by tonight

Xelga [282]

Answer:

3 $\frac{1}{2}$

Step-by-step explanation:

Given

$\frac{\frac{1}{2} }{4}$ = $\frac{x}{28}$ ( cross- multiply )

4x = $\frac{1}{2}$ × 28 = 14 ( divide both sides by 4 )

x = $\frac{14}{4}$ = $\frac{7}{2}$ = 3 $\frac{1}{2}$

4 0

3 years ago

What is the answer and how did you get the answer

monitta

It’s 180 = 100 + angle 1.

5 0

2 years ago

If perimeter rectangular is 204 feet the width 45 feet what’s the length of the yard

Minchanka [31]

The length of the yard is 159 ft.

5 0

2 years ago

Read 2 more answers

Hi, teacher I was absent these days and I didn’t understand anything about this lesson and I need help this is not count as a te

motikmotik

Given:

There are given that the cos function:

$cos210^{\circ}=-\frac{\sqrt{3}}{2}$

Explanation:

To find the value, first, we need to use the half-angle formula:

So,

From the half-angle formula:

$cos(\frac{\theta}{2})=\pm\sqrt{\frac{1+cos\theta}{2}}$

Then,

Since 105 degrees is the 2nd quadrant so cosine is negative

Then,

By the formula:

$\begin{gathered} cos(105^{\circ})=cos(\frac{210^{\circ}}{2}) \\ =-\sqrt{\frac{1+cos(210)}{2}} \end{gathered}$

Then,

Put the value of cos210 degrees into the above function:

So,

$\begin{gathered} cos(105^{\circ})=-\sqrt{\frac{1+cos(210)}{2}} \\ cos(105^{\operatorname{\circ}})=-\sqrt{\frac{1-\frac{\sqrt{3}}{2}}{2}} \\ cos(105^{\circ})=-\sqrt{\frac{2-\sqrt{3}}{4}} \\ cos(105^{\circ})=-\frac{\sqrt{2-\sqrt{3}}}{2} \end{gathered}$

Final answer:

Hence, the value of the cos(105) is shown below:

$cos(105^{\operatorname{\circ}})=-\frac{\sqrt{2-\sqrt{3}}}{2}$

4 0

11 months ago