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ikadub [295]
2 years ago
8

There are 200 9th graders in the freshman class. 2/5 of the students are girls. How

Mathematics
1 answer:
alekssr [168]2 years ago
7 0

Answer: 80

Step-by-step explanation:

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A barrel of oil was filled at a constant rate of 7.5 gal/min. the barrel had 10 gallons before filling began. write an equation
Xelga [282]
Assuming that  :

- The number of the gallons is symbolized by g
- Time per minute is symbolized by t

the equation would be :

g  =  10 + 7.5 t

Hope this helps

5 0
3 years ago
Jill and Sam are racing go-karts. Jill's completed 16 laps in 12 minutes. If Sammy raced at the same rate, how many minutes did
Umnica [9.8K]
It would take 2.25 minutes to complete 3 laps because each lap takes .75 minutes.
4 0
3 years ago
You pick 4 digits (0-9) at random without replacement, and write them in the order picked. what is the probability that you have
Sophie [7]

The number of ways of choosing 4 digits from 10 digits without replacement ( order is important) is P(10,4)=\frac{10!}{(10-4)!} =\frac{10!}{(6)!} =7*8*9*10=5040. This is the number of all possible permutations of choosing 4 from 10. The first 4 numbers of your phone number is a unique 4 digit number(4 different digits). The required probability is

\frac{1}{5040}

7 0
3 years ago
Do alto de um farol cuja altura é de 20 m avista se um navio sob ângulo de depressão de 30°. A que distância , aproximadamente,
Mkey [24]
Esta é a trigonometria . Se você desenhar uma linha a partir do topo da casa de luz para o barco, você terá a hypotonuse de um triângulo. Um truque é lembrar que este é um triângulo especial. É um triângulo 30-60-90 , que tem propriedades especiais mostradas na fixação abaixo . por isso sabemos que o lado adjacente que não é o hyposonuse é x√3 . Agora sabemos que x<span>√3 = 20
Solve for x.
x</span><span>√3=20
divide both sides by </span><span>√3.
x=20/(</span><span><span>√3)
</span>Try not to have square roots (</span><span><span>√)</span> in denomenator so multiply top and bottom by </span><span>√3 and get
x=(20</span><span>√3)/3
x is what we are looking for so the answer is </span>
20<span>√3 m </span><span>ou cerca de 34.64 m</span>










7 0
3 years ago
Josiah went to the local barber to get his haircut. It cost $18 for the haircut. Josiah tipped the barber 15%. What was the tota
salantis [7]

Answer:

2.70

Step-by-step explanation:

5 0
3 years ago
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