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Brilliant_brown [7]
3 years ago
6

The side length of an equilateral triangle is 20 cm. Find the length of the altitude

Mathematics
2 answers:
Effectus [21]3 years ago
7 0
Split in half 20 squared + 10 squared
then find the square root of the answer
10-/5
andreyandreev [35.5K]3 years ago
7 0

Answer:

like it i am a Beiniger please help

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Carlos had48 brownies. He ate 3 brownies and then gave 2 brownies to each of his 16 friends. How many brownies does Carlos have
Artist 52 [7]

Answer:

carlos will have one brownie left over.

Step-by-step explanation:

im smart

4 0
3 years ago
-0.6 + (- 2.5) <br> can someone tell me and explain please the answer.
xenn [34]
A negative plus a negative is going to be a negative in this case. so your subtracted but to really look like your adding them together
4 0
2 years ago
What is the margin of error for a yes/no survey of 200 people with a proportion of 65% who answered \"yes\"?. A. ±3.37%. B. ±5.0
azamat
\sqrt{(p*q)/n}

where p is the number of positive outcomes (yes) and q is the number of negative outcomes (no).

\sqrt{(0.65*(1-0.65))/200} = 0.0337 or 3.37%

answer is A.
6 0
4 years ago
Jared has a wooden board 11 ft long. He wants to cut it into two pieces so that the longer piece (y) is 4 ft less than 4 times t
patriot [66]

Answer:

the answer is x + y = 11 and y = 4x - 4

8 0
3 years ago
Find d for the arithmetic series with S17=-170 and a1=2
Irina18 [472]
So, we know the sum of the first 17 terms is -170, thus S₁₇ = -170, and we also know the first term is 2, well

\bf \textit{ sum of a finite arithmetic sequence}\\\\&#10;S_n=\cfrac{n(a_1+a_n)}{2}\qquad &#10;\begin{cases}&#10;n=n^{th}\ term\\&#10;a_1=\textit{first term's value}\\&#10;----------\\&#10;n=17\\&#10;S_{17}=-170\\&#10;a_1=2&#10;\end{cases}&#10;\\\\\\&#10;-170=\cfrac{17(2+a_{17})}{2}\implies \cfrac{-170}{17}=\cfrac{(2+a_{17})}{2}&#10;\\\\\\&#10;-10=\cfrac{(2+a_{17})}{2}\implies -20=2+a_{17}\implies -22=a_{17}

well, since the 17th term is that much, let's check what "d" is then anyway,

\bf n^{th}\textit{ term of an arithmetic sequence}\\\\&#10;a_n=a_1+(n-1)d\qquad &#10;\begin{cases}&#10;n=n^{th}\ term\\&#10;a_1=\textit{first term's value}\\&#10;d=\textit{common difference}\\&#10;----------\\&#10;n=17\\&#10;a_{17}=-22\\&#10;a_1=2&#10;\end{cases}&#10;\\\\\\&#10;-22=2+(17-1)d\implies -22=2+16d\implies -24=16d&#10;\\\\\\&#10;\cfrac{-24}{16}=d\implies -\cfrac{3}{2}=d
6 0
4 years ago
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