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3 years ago

Hellllllllllpppppppppp please

Mathematics

2 answers:

malfutka [58]3 years ago

6 0

Answer:

Hey! Your answer is C.

Step-by-step explanation:

if you look at graph #3 and move your finger across the horizontal line moving to the right, going to positive two you'll see that there is a dot at exactly 2 1/2. so, you've got the point (2, 2 1/2)

Then, if you move your finger horizontally to the left, you'll get to -1 1/2. Then, moving your finger down you'll find a point at (-1 1/2, -4)

3241004551 [841]3 years ago

5 0

Answer:

I believe it's c

Step-by-step explanation:

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3 years ago

The mean age of 9 women in an office is 27 years old. The mean age of 7 men in an office is 25 years old. What is the mean age (

marta [7]

Answer:

26 years

Step-by-step explanation:

Given:

The mean age of 9 women = 27 years old

The mean age of 7 men = 25 years old

Question asked:

What is the mean age (nearest year) of all the people in the office?

solution:

By using, mean = sum of observations divided by number of entities

The mean age of 9 women = 27 years old

$\frac{sum of ages}{number of women}$ = $27$

$Sum of ages of women = 27 \times9 = 243\\$ $years$

The mean age of 7 men = 25 years old

$\frac{sum of ages}{number of men}$ = $25$

$sum of ages of men = 25 \times7 = 175$

Total sum of ages of men and women in the office = 243 + 175

= 418 years

Total number of people in the office = 9 women + 7 men = 16

The mean age of all the people in the office = Total sum of ages of men and women in the office divided by Total number of people in the office

= $\frac{418}{16} = 26.125$

Therefore, the mean age (nearest year) of all the people in the office = 26 years

6 0

4 years ago

For which angle theta is cos theta =-1?<br>a) 270<br>b) 360<br>c) 450<br>d) 540

yanalaym [24]

Answer:

540°.

Step-by-step explanation:

On a unit circle, cos θ = -1 at 180°.

However, cos θ has a period of 2π, or 360°. This means that cos θ will equal to -1 again after 2π.

To solve for the angle:

180° + 360° = 540°. This is the next angle at which cos θ = -1.

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3 years ago

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The distance between two cities on a map is 3.5 centimeters the map uses a scale in which 1 centimeter represents 20 km what is

Juli2301 [7.4K]

Answer:

1 cm = 20 km

so 3.5 cm would equal : 3.5 * 20 = 70 km

hope it helps ;)

Step-by-step explanation:

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