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Dmitry_Shevchenko [17]
3 years ago
6

Help please help. help help​

Mathematics
1 answer:
dezoksy [38]3 years ago
5 0

Answer:

Step-by-step explanation:

10 students participated in a Mathematics quiz. If the number of girls is 4 more than the number of boys, find the number of boys and girls who took part in the quiz

Solution: Number of girls = x

Number of boys = y

x + y = 10 -------------------(I)

Number of girls is 4 more than the number of boys

x - y = 4 ----------------------(I)

  x =  4 + y

Substitute x = 4 +y in equation (I)

4+ y + y = 10

4  + 2y = 10

       2y = 10-4

       2y= 6

          y = 6/2

y = 3

Plug in y = 3 in eqution (I)

x + 3 = 10

        x = 10 - 3

x = 7

Number of girls = 7

Number of boys = 3

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When 50 mL of water is added, the graduated cylinder has a mass of 180 g. If a rook is added to the graduated cylinder, the wate
Bezzdna [24]

Answer:

2.25 (or \frac{9}{4}) g/mL

<u>Skills needed: Density</u>

Step-by-step explanation:

1) Briefly, let's cover what density is:

- It is \frac{mass}{volume}

- Measures the mass per unit of volume

- In this situation the formula for density is: \frac{m_f-m_i}{v_f-v_i}

---> m_f is the final mass

---> m_i is the initial mass

---> v_f is the final volume

---> v_i is the initial volume

2) In this case, we start out with a mass of 180 grams as stated in the problem, and also 50 mL of water initially.

This means that:

- m_i is 180 g

- v_i is 50 mL

3) Also, we end up with 270 g in mass, and 90 mL of water finally.

- m_f is 270g

- v_f is 90 mL

4) We can find density by substitute given the values above:

\frac{270-180}{90-50} = \frac{90}{40} = \frac{9}{4} \text{ or } 2.25

5) Our answer is 2.25 g/mL (since mass is grams (g), and volume is milliliters (mL) in the problem above).

3 0
3 years ago
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3 years ago
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Answer: g=p/2-20

Step-by-step explanation:

6 0
3 years ago
Motors Inc. manufactured 356 cars with automatic​ transmissions, 240 with power​ steering, and 96 with both of these options. Ho
Anon25 [30]

Answer:

<u>The answer is 692.</u>

Step-by-step explanation:

Number of cars with automatic​ transmissions = 356

Number of cars with power steering = 240

Number of cars with both of these options = 96

Number of cars that were manufactured with at least one of the two​ options = x

x = Number of cars with automatic transmission + Number of card with power steering + Number of cars with both of these options

x = 356 + 240 + 96

<u>x = 692</u>

<u>The number of cars manufactured with at least one of the two options is 692.</u>

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4 years ago
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AleksAgata [21]
The answer for you're question is 4600


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3 years ago
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