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3 years ago

What is the value of y? Enter your answer, as an exact value, in the box.

Mathematics

1 answer:

OLga [1]3 years ago

7 0

We know the bottom triangle is a 45, 45, 90 triangle, so the hypotenuse is √2 times the value of the legs:

(√2)(√2)
=√4
=2

Now, we can use this to solve for y. The top triangle is a 30, 60, 90 triangle. The side we found above is the side across from the 30 degree angle. The side opposite the 60 degree angle is √3 times the side across the 30 degree angle. Therefore, we can solve for y by multiplying 2 by √3

y=2√3

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Roberto has a sample of an unknown liquid. The label in the bottle of the sample indicates that the liquid has a mass of 117 gra

Tomtit [17]

Answer:

It is Milk

Step-by-step explanation:

The liquid in the bottle has mass given in grams and the mass of that substance is 117 grams.

The volume of the substance is 15 cubic centimeters.

Now, using the formula of density we can estimate which substance could it be.

$d=\frac{m}{v}$ , where 'd', is the density, 'm' is the mass, and 'v' is the volume of the substance.

Plugging the value of mass and volume we get:

$d=\frac{117}{15} =7.8g/cm^3$

So the density of the substance is 7.8 grams per cubic centimeter.

It cannot be water since the density of water is 1 grams per cubic centimeter.

It cannot be gasoline because its density is 0.77 grams per cubic centimeter.

It cannot be mercury because the density of mercury is 13.56 grams per cubic centimeter.

Since, the density in this case matches the density of thick milk and hence,therefore, the liquid in the bottle is milk.

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3 years ago

Qfind the product. Write the product in simplest form 1 2/3 x 4 2/5

Elan Coil [88]

1 2/3 = 5/3
4 2/5 = 22/5
5/3•22/5= 110/15
= 22/3

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3 years ago

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serg [7]

By direct correspondence AB = PQ

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2 years ago

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Many non-profit groups ask for donations during December. Do men give higher monetary donations than women in the month of Decem

Lelu [443]

Answer:

For this case we want to test if do men give higher monetary donations than women in the month of December (alternative hypothesis) and the complement should be the null hypothesis. So then the sytem of hypothesis are:

Null hypothesis: $\mu_m -\mu_w \leq 0$

Alternative hypothesis : $\mu_m -\mu_w >0$

So then the best option would be:

d. Ha: mum -muw > 0

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Solution to the problem

Null hypothesis: $\mu_m -\mu_w \leq 0$

Alternative hypothesis : $\mu_m -\mu_w >0$

So then the best option would be:

d. Ha: mum -muw > 0

3 0

3 years ago