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2 years ago

SOMEONE PLS HALP MEH I REPEAT I NEED HELP HELP (7th grade math) Mark as brainliest! :3

Mathematics

1 answer:

Nata [24]2 years ago

3 0

Answer:

3 3/4 cups of coca powder

Step-by-step explanation:

60 brownies

12 brownies for 3/4 cup of cocoa powder

60/12=5

5(3/4)= 15/4

15/4= 3 3/4 cup of coca powder

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Let

Roman55 [17]

I hoped this helped or something

5 0

2 years ago

Find the exact value of sin2 theta given sin theta =5/13, 90°<theta <180°

Zepler [3.9K]

Now, we know that 90°< θ <180°, that simply means the angle θ is in the II quadrant, where sine is positive and cosine is negative.

$\bf sin(\theta )=\cfrac{\stackrel{opposite}{5}}{\stackrel{hypotenuse}{13}}\impliedby \textit{now let's find the \underline{adjacent side}}
\\\\\\
\textit{using the pythagorean theorem}\\\\
c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a\qquad 
\begin{cases}
c=hypotenuse\\
a=adjacent\\
b=opposite\\
\end{cases}$

$\bf \pm\sqrt{13^2-5^2}=a\implies \pm\sqrt{144}=a\implies \pm 12 =a \implies \stackrel{II~quadrant}{-12=a}
\\\\\\
therefore \qquad cos(\theta )=\cfrac{\stackrel{adjacent}{-12}}{\stackrel{hypotenuse}{13}}
\\\\
-------------------------------\\\\
sin(2\theta )\implies 2sin(\theta )cos(\theta )\implies 2\left(\frac{5}{13} \right)\left( \frac{-12}{13} \right)\implies -\cfrac{120}{169}$

3 0

3 years ago

PLZ HELP!!! WILL GIVE HIGHEST POINTS IF THE ANSWER IS RIGHT!!

PilotLPTM [1.2K]

Step-by-step explanation:

Standard polynomial is:

$- 20 {x}^{3} - 3 {x}^{2} + 4x$

Leading co effecient is:

-20

8 0

2 years ago

pleas help on the second ASAP it was due yesterday.. i dont even understand how to do any of it and i will give brainliest <3

aliya0001 [1]

Answer:

$3x^{4}$

Step-by-step explanation:

I suggest looking lessons on it online if you don't understand... It's hard to do your work especially if you don't understand it. Or if your online, go to past lessons or something.

6 0

2 years ago

Read 2 more answers

Kevin has $25. MP3 downloads cost $0.75 each. How many songs can he download and still have $13 left to spend?

matrenka [14]

It would be .75x=25-13
So .75x=12
x=16 because .75×16=12

8 0

2 years ago

Read 2 more answers