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mr Goodwill [35]

3 years ago

8

A scientist needs 72 milliliters of distilled water for each of 15 experiments. She has a bottle that contains 975 milliliters o

f distilled water. Is there enough water in the bottle for all 15 experiments? Explain.

1 answer:

natima [27]3 years ago

7 0

Answer:

No

Step-by-step explanation:

To solve this equation you need to divide 975 by 72. After you divide those 2 numbers, you get 13/5... This means, that the scientist does not have enough distilled water for all 15 experiments. She only has enough for 13 experiments since about 1/2 is not a full amount.

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Simplify the expressions.1 a. –2 t + 5 t – 2 – t

masha68 [24]

Answer:

1 a.) 2t – 2

1 b.) –9z + 4

2 a.) –2v + 3

2 b.) –13k – 9

3 a.) 7w − 2

3 b.) 10s

4 a.) 5

4 b.) –3p + 11

5 a.) –29x + 9

b.) 15v – 60x – 2

a.) 25n + 2

b.) –15n

a.) –71x + 4

b.) –15b

Step-by-step explanation:

<em>NOTE: I am kind of confused about the way this question is formatted, so I tried to answer everything I could decipher.</em>

1 a.) –2t + 5t – 2 – t → 2t – 2

1 b.) –5z + 4 – 4z → –9z + 4

2 a.) 8v + 3 – 10v → –2v + 3

2 b.) –6 – 6k – 3 – 7k → –13k – 9

3 a.) –6 – 3w + 4 + 10w → 7w − 2

3 b.) 9s + s → 10s

4 a.) 6 + 8b – 1 – 8b → 5

4 b.) 1p + 6 + 5 – 4p → –3p + 11

5 a.) 4x – 3x + 9 – 6x 5 → –29x + 9

b.) 9v + 6v – 2 – 10x 6 → 15v – 60x – 2

a.) n + 2 – (–4)n 6 → 25n + 2

b.) 6n – 3n 7 → –15n

a.) –4x – 4x + 4 – 9x 7 → –71x + 4

b.) –9b + (–6)b → –15b

7 0

3 years ago

A submarine left Diego Garcia five hours before a cruise ship. The ships traveled in opposite directions. The cruise ship travel

Rina8888 [55]

Answer:

The speed of the submarine is 15.429 miles per hour.

Step-by-step explanation:

Let suppose that both ships travel at constant velocities. As we know that both travel in opposite directions, it is supposed that cruise ship moves in +x direction, whereas submarine in -x direction. Kinematic equations for each sheep are described below:

Ship

$x_{Sh} = x_{o} + v_{Sh}\cdot t$

Submarine

$x_{Su} = x_{o}+v_{Su}\cdot t$

Where:

$x_{o}$ - Position of Diego Garcia island, measured in miles.

$x_{Sh}$ , $x_{Su}$ - Current positions of ship and submarine, measured in miles.

$v_{Sh}$ , $v_{Su}$ - Velocities of ship and submarine, measured in miles per hour.

$t$ - TIme, measured in hours.

If we know that $x_{Sh} - x_{Su} = 241\,mi$ , $v_{Sh} = 19\,\frac{mi}{h}$ and $t = 7\,h$ , then:

$x_{Sh} - x_{Su} = (v_{Sh}-v_{Su})\cdot t$

We clear now the velocity of submarine:

$\frac{x_{Sh}-x_{Su}}{t} = v_{Sh}-v_{Su}$

$v_{Su} = v_{Sh}-\frac{x_{Sh}-x_{Su}}{t}$

$v_{Su} = 19\,\frac{mi}{h} -\frac{241\,mi}{7\,h}$

$v_{Su} = -15.429\,\frac{mi}{h}$

Speed of the submarine is the magnitude of its velocity, which is 15.429 miles per hour.

4 0

3 years ago

If n erasers have a weight of 80 grams, what is the total weight of 50 erasers?

Black_prince [1.1K]

Answer:

$The\ weight\ of\ the\ 50\ erasers\ be\ \frac{4000}{n}\ grams.$

Step-by-step explanation:

As given

if n erasers have a weight of 80 grams .

I.e

n erasera = 80 grams.

1 erasers weight .

$1\ erasers\ weight = \frac{80}{n}$

Now find out the weight of the 50 erasers.

$Weight\ of\ 50\ erasers = \frac{50\times 80}{n}\ grams$

Simplify the above

$Weight\ of\ 50\ erasers = \frac{4000}{n}\ grams$

$Therefore\ the\ weight\ of\ the\ 50\ erasers\ be\ \frac{4000}{n}\ grams.$

6 0

3 years ago

Read 2 more answers

8x-3y=6-4x in linear equation

castortr0y [4]

It would be y=4x-2 because:
8x-3y=6-4x
-8x -8x
-3y=6-12x
/-3 /-3 /-3
y=-2+4x
y=4x-2

4 0

3 years ago

Somebody please help me I’ll give you brainiest if you’re right

Pavlova-9 [17]

Answer: I belive the answer would be 18 the only number we have is 52 and 36 the other answers just don't make sense, I am only taking 9th grade but hey I try!

Step-by-step explanation:

6 0

3 years ago