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3 years ago

Quick IM timed!!

Mathematics

2 answers:

Ivahew [28]3 years ago

7 0

Answer:

I think it is A

Step-by-step explanation:

This is becuase by putting the sod in different areas, confounding variables, such as shade and the quality of the soil, may be able to affect the results.

Andrews [41]3 years ago

4 0

Answer:

The researcher did not randomly assign the pieces of sod to the treatment groups.

Step-by-step explanation:

Edge 2020/2021

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Considering only the values of <img src="https://tex.z-dn.net/?f=%5Cbeta" id="TexFormula1" title="\beta" alt="\beta" align="absm

morpeh [17]

$\large\boxed{Answer:}$

We will use trigonometric identities to solve this. I will use θ (theta) for the angle.

First of all, we know that cotθ = 1/tanθ. This is a trigonometric identity.

We can replace cotθ in the expression with 1/tanθ.

$sin\theta tan\theta sec\theta \frac{1}{tan\theta}$

Simplify: 1/tanθ * tanθ = tanθ/tanθ = 1

So now, we have:

$sin\theta sec\theta$

Next, we also know that secθ = 1/cosθ. This is another trigonometric identity.

We can replace secθ with 1/cosθ in our expression.

$sin\theta \frac{1}{cos\theta}$

Simplify:

$\frac{sin\theta}{cos\theta}$

Our third trigonometric identity that we will use is tanθ = sinθ/cosθ.

We can replace sinθ/cosθ with tanθ.

Now we have as our final answer:

$\large\boxed{b.\ tan\theta}$

Hope this helps!

7 0

3 years ago

Read 2 more answers

Aight fams, help me out now please. back me up and i will give brainliest. no links muh g's

Nastasia [14]

Answer:

1/36

Step-by-step explanation:

There's only 1 way to get the sum of 2.

1,1

7 0

3 years ago

Use the squared identities to simplify 2sin^2xcos^2x

Rainbow [258]

$\bf sin^2({{ \theta}})=\cfrac{1-cos(2{{ \theta}})}{2}\qquad \qquad 

cos^2({{ \theta}})=\cfrac{1+cos(2{{ \theta}})}{2}\\
-----------------------------\\
thus
\\\\
2sin^2(x)cos^2(x)\implies \boxed{2}\cdot \cfrac{1-cos(2{{ x}})}{\boxed{2}}\cdot \cfrac{1+cos(2{{ x}})}{2}
\\\\
\cfrac{1-cos(2{{ x}})}{1}\cdot \cfrac{1+cos(2{{ x}})}{2}\implies 
\cfrac{[1-cos(2x)][1+cos(2x)]}{2}\\
-----------------------------\\
\textit{now recall}\implies \textit{difference of squares}
\\ \quad \\
$

$\bf (a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)\\
-----------------------------\\
thus
\\\\
\cfrac{[1-cos(2x)][1+cos(2x)]}{2}\implies \cfrac{1^2-cos^2(x)}{2}
\\\\
 \cfrac{1-cos^2(x)}{2}\impliedby 
\begin{array}{llll}
\textit{pretty sure you know what that numerator is}\\
\textit{check your pythagorean identities}
\end{array}$

7 0

3 years ago

Read 2 more answers

Help me out i would appreciate it

Mariulka [41]

Step-by-step explanation:

find the area of the rectangle

then surface area=.......

then subtract by the volume of rectangle by the other one

7 0

3 years ago

Please help with the problem

worty [1.4K]

Answer:

95%

Step-by-step explanation:

0.6 of 40 is 24, she bought 24 green balloons.

24 × 1.5 = 36, she bought 36 yellow balloons.

So we have

40 red

24 green

36 yellow

Then from the rest of the information, 2 red, 2 green, and 1 yellow balloon all popped.

We now have

38 red

22 green

35 yellow

for a total of:

95 balloons out of 100 original balloons, 95%

7 0

3 years ago