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sp2606 [1]
3 years ago
9

Fill in the blank.

Mathematics
2 answers:
murzikaleks [220]3 years ago
6 0

Answer:

Part 1) x=44.80\ units

Part 2) y=56.85\ units

Step-by-step explanation:

Part 1) Find the value of x

we know that

In the right triangle of the figure

The tangent of angle of 52 degrees is equal to divide the opposite side to the angle of 52 degrees (x units) by the adjacent side to the angle of 52 degrees (35 units)

tan(52\°)=x/35

Solve for x

x=(35)tan(52\°)

x=44.80\ units

Part 2) Find the value of y

we know that

In the right triangle of the figure

The cosine of angle of 52 degrees is equal to divide the adjacent side to the angle of 52 degrees (35 units) by the hypotenuse (y units)

cos(52\°)=35/y

Solve for y

y=35/cos(52\°)

y=56.85\ units

denis23 [38]3 years ago
5 0

Answer:

x = 56.85 units and y = 44.80 units.

Step-by-step explanation:

From the given figure it is clear that the given triangle is a right angle triangle.

According to the angle sum property of triangle the sum of interior angle of a triangle is 180°.

z^{\circ}+90^{\circ}+52^{\circ}=180^{\circ}

z^{\circ}+142^{\circ}=180^{\circ}

z^{\circ}=180^{\circ}-142^{\circ}

z^{\circ}=38^{\circ}

Law of Sine:

\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}

Using Law of Sine we get

\dfrac{x}{\sin 52^{\circ}}=\dfrac{y}{\sin 90^{\circ}}=\dfrac{35}{\sin 38^{\circ}}

\dfrac{x}{\sin 52^{\circ}}=\dfrac{35}{\sin 38^{\circ}}

x=\dfrac{35}{\sin 38^{\circ}}\times \sin 52^{\circ}

x\approx 44.80

The value of x is 44.80 units.

\dfrac{y}{\sin 90^{\circ}}=\dfrac{35}{\sin 38^{\circ}}

y=\dfrac{35}{\sin 38^{\circ}}\times \sin 90^{\circ}

y\approx 56.85

Therefore, the value of y is 56.85 units.

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Answer:

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Step-by-step explanation:

This study aimed to check which clean-up/drying up method after handwashing was more effective; that is, do dryers eliminate more germs than paper towels.

It involved 100 people that took part in the study. The 100 of them contaminated their hands and were instructed to wash their hands with soap and water for 15 seconds before the participants are randomly grouped into two strata; one stratum/group (consisting of 50 participants) that dries their hands with a dryer and another (also consisting of 50 participants) that dry their hands with paper towels.

An observational study is one in which data is collected only by monitoring the events of the study. The conductor of the study in no way tries to intervene or control any of the variables being studied. No control, no tweaking of factors, just observe and record data.

An observational study based on a stratified sample is an observational study that uses the stratified sampling method to carry out its objectives. It randomly puts each of the participants being observed into groups or strata. Each group of randomly assigned participants are then required to run the test for one of the variables being compared.

This is exactly what the study in the question describes. This is why this study is undoubtedly an observational study based on a stratified sample.

Hope this Helps!!!

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Answer:

a) <em>The equation</em> (10s + 8w) <em>represents </em><em>the </em><em>calories </em><em>Bridget </em><em>ate </em><em>on </em><em>Monday </em><em>and </em><em>the </em><em>equation</em> (20s + w) <em>represents </em><em>the </em><em>calories</em><em> </em><em>she </em><em>ate</em><em> </em><em>the </em><em>next </em><em>day.</em>

<em>b)</em><em> </em><em>The </em><em>number </em><em>of </em><em>calories</em><em> </em><em>in </em><em>each </em><em>strawberry</em><em> </em><em>is </em>4 <em>and </em><em>the </em><em>number </em><em>of </em><em>calories </em><em>in </em><em>each </em><em>vanilla</em><em> </em><em>wafer</em><em> cookie</em><em> </em><em>is </em>19. The solution is s= 4 and w = 19.

Step-by-step explanation:

For part A, Bridget ate 10 strawberries and 8 vanilla wafer cookies on Monday. Since the the number of calories in a strawberry is <em>s</em> and the number of calories in a vanilla wafer cookie is <em>w </em>, the number of calories Bridget ate on Monday is <em>10s + 8w</em><em>.</em><em> </em>The next day, Bridget ate 20 strawberries and 1 vanilla wafer cookie. Hence, the number of calories Bridget ate on the next day is 20s<em> + w</em>.

For part B,

we will create two different simultaneous equations.

Equation 1: 10s + 8w = 192

Equation 2: 20s + w = 99

We need to find one of the terms first to solve the other term. For this case, I will solve for w first.

Multiply the first equation by 2.

Equation 3: 20s + 16w = 192*2 = 384.

Now, subtract equation 2 from this new equation.

Equation 4:

(20s + 16w) - (20s + w) = 384 - 99

20s + 16w - 20s - w = 285

15w = 285

This leaves only w left and we can solve w.

w = 285 / 15 = 19

Now, we can solve for s using equation 2.

20s + 19 = 99

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s = 80/20 = 4

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