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madam [21]
3 years ago
9

X + 1/4x = 15. What is the solution to the equation?

Mathematics
1 answer:
Sauron [17]3 years ago
7 0

Answer:

Step-by-step explanation:

hello :

X + 1/4x = 15

multiply by 4 : 4x+x = 60

5x=60

now divid by 5 you have : x=12

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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
Which ratio correctly compares 2 feet to 48 inches, when the lengths are written using the same units?
guajiro [1.7K]

Answer: OPTION D

Step-by-step explanation:

To solve this problem you must apply the proccedure shown below:

- Convert from 48 inches to foot. You know that 12 inches=1 foot. Then you have:

 (48inches)(\frac{1foot}{12inches})=4feet

- Therefore, keeping on mind that 48 inches is 4 feet, and you must find the ratio that  correctly compares 2 feet to 48 inches, you can write:

ratio=\frac{2feet}{4feet}

- Reduce the fraction, then:

ratio=\frac{1}{2}

- You can rewrite it as following:

ratio=1:2

3 0
3 years ago
Simplify the expression<br> –2 + 7(x + 8)
anastassius [24]

Answer:

54+7x

Step-by-step explanation:

-2+7(x+8)

-2+7x+56

54+7x

7 0
2 years ago
Read 2 more answers
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KengaRu [80]

Answer:

B and D

Step-by-step explanation:

Take a look at all the options x=4, 3, 1, 2 > 0

So, we just care about the domain where x>0, which is f(x)=x^{2}.

Then plug in x we will have the right answer.

5 0
3 years ago
Simplify the expression: sqrt(-25) / (5-2i) + (1-3i)
Tanzania [10]
61 would be the most simplified without expressions


5 0
3 years ago
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