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3 years ago

7

How many quarts of pure antifreeze must be added to 5 quarts of a 10 % antifreeze solution to obtain a 20 % antifreeze soluti

on?

1 answer:

Black_prince [1.1K]3 years ago

4 0

Hey let’s be friends

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If 3 2/5 is the lesser number in an inequality, which statement is true?

Elena L [17]

Answer:

B is correct

Step-by-step explanation:

Please let me know if you want me to add an explanation as to why this is the answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)

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3 years ago

In triangle XYZ, shown above, what is the value of cos(X)?

adell [148]

Answer:

A

Step-by-step explanation:

Sine we can figure out side XY by using Pythagorean Theorem (A^2+B^2=C^2) and find that XY= 5, We can use Soh Cah Toa (The ways I remember to use value charts) and we know that Cosine uses Adjacent over Hypotenuse in which therefore the answer would be 5/13

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3 years ago

In a recent Super Bowl, a TV network predicted that 31 % of the audience would express an interest in seeing one of its forthcom

Tpy6a [65]

Answer:

-4.317

Step-by-step explanation:

The z test statistic for testing of 1-proportion can be computed as

$z=\frac{phat-p}{\sqrt{\frac{pq}{n} } }$

We know that

phat=x/n.

We know that x=40 and n=120.

Thus,

phat=40/120=0.3333

p=hypothesized proportion=0.53

q=1-p=1-0.53=0.47

So, required z-statistic is

$z=\frac{0.3333-0.53}{\sqrt{\frac{0.53(0.47)}{120} } }$

$z=\frac{-0.1967}{ 0.04556 }$

z=-4.317.

Thus, the required test statistic value for given hypothesis is z=-4.317.

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4 years ago

Neeed help please???????!!!!!!

irakobra [83]

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3 years ago

Someone please help me with this question

alexira [117]

Is there another part of this?

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3 years ago