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3 years ago

There are 12 adults, 24 girls and 6 boys in a room.

Mathematics

1 answer:

koban [17]3 years ago

8 0

Answer:

12:24:6- divide by 3

4:8:2 - divide by 2

2:4:1- simplest form

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EFGD is a parallelogram. Find x.

Ann [662]

Answer:

x = 11

BD = 10

Step-by-step explanation:

Solving for x

The opposite sides if a parallelogram are equal and parallel.

Hence,

2x - 5 = 17

Collecting like terms:

2x = 17 + 5

2x = 22

x = 11

If E is a midpoint, then BE equals to DE

Since BE = 5, then

BD = 2 * BE

BD = 10

4 0

3 years ago

Can someone help and explain

ruslelena [56]

Answer:

$\frac{1}{2}$ blocks

Step-by-step explanation:

If it takes 15 minutes to walk 7 1/2 blocks, it should be 15:17 $\frac{1}{2}$

The left side is minutes and the right side is the number of blocks

15:17 $\frac{1}{2}$

1: ? Since we are figuring out how many blocks he can walk in a minute, the left side is 1 and the right side is a question mark because we have not figured it out yet.

15: 17 $\frac{1}{2}$ Divide by 15 on both sides because that is the "distance" from 15 to1

1 : ?

1: $\frac{1}{2}$

So the answer is $\frac{1}{2}$

5 0

3 years ago

ABC is a right-angled triangle.

Amiraneli [1.4K]

Answer:

14.5

Step-by-step explanation:

The pythagoreom theorum shows a^2 + b^2 = c^2. Therefore, c^2 - a^2 = b^2

256 - 44.89 = 211.11

The square root of 211.11 rounded to the first decimal place is 14.5

8 0

3 years ago

14. How many degrees does the minute hand of the clock go through between 6:47 and 11:18?

kompoz [17]

Answer:

Step-by-step explanation:

6 0

3 years ago

A model rocket launched directly upward at a speed of 16 meters per second from a helght of 2 meters . The f(t) = - 4.9t ^ 2 + 1

Anton [14]

Answer:

f(t) = 15.06 m

Step-by-step explanation:

The relationship between the height of the rocket and the time after launch, t. In seconds is given by :

$f(t) = - 4.9t ^ 2 + 16t + 2$

We need to find the maximum height the rocket will reach the ground.

When it reaches the ground,

f(t) = 0

So,

Maximum height,

f'(t) = 0

$-9.8t+16=0\\\\t=\dfrac{16}{9.8}\\\\t=1.63\ s$

Put t = 1.63 in equation (1).

$f(1.63) = - 4.9\times (1.63 ^ 2) + 16(1.63) + 2\\\\=15.06\ m$

So, the maximum height of the rocket is 15.06 m.

4 0

3 years ago