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kondaur [170]
2 years ago
5

Find the value of x round to the nearest tenth

Mathematics
2 answers:
pychu [463]2 years ago
7 0

Answer:

23.0 =x

Step-by-step explanation:

Assuming this is a right triangle

cos theta = adj/ hypotenuse

cos 23 = x/25

Multiply each side by 25

25 cos 23 = x

23.01262134 =x

To the nearest tenth

23.0 =x

Elina [12.6K]2 years ago
6 0
23.0 i’m sure that’s the answer
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How to simplify rational expressions
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So, what we will do is, multiply both top and bottom, by the conjugate of the denominator, so, the denominator is 7 + 10i, so its conjugate is 7 - 10i then, let's do so.

\bf \textit{difference of squares}
\\ \quad \\
(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)
\\\\\\
\textit{also recall that }i^2=-1\\\\
-------------------------------\\\\

\bf \cfrac{-3-7i}{7+10i}\cdot \cfrac{7-10i}{7-10i}\implies \cfrac{(-3-7i)(7-10i)}{(7+10i)(7-10i)}\implies \cfrac{(-3-7i)(7-10i)}{7^2-(10i)^2}
\\\\\\
\cfrac{-21+30i-49i+70i^2}{7^2-(10^2i^2)}\implies \cfrac{-21+30i-49i+70\left( \boxed{-1} \right)}{7^2-\left[10^2\left( \boxed{-1} \right)\right]}
\\\\\\
\cfrac{-21+30i-49i-70}{49-(-100)}\implies \cfrac{-91-19i}{149}\implies -\cfrac{91}{149}-\cfrac{19i}{149}
7 0
3 years ago
(100 POINTS)The table below shows Karen's distance during the marathon. What is Brianna's rate of
tino4ka555 [31]

Answer:

6 miles per hour

3 0
2 years ago
Read 2 more answers
Round the number 824,916 to the nearest tens, nearest thousands, and nearest ten-thousands.
Igoryamba
Nearest tens = 824,920
nearest thousands =825,000
nearest ten thousands =820,000
4 0
3 years ago
84,000 of food for 80 soldiers for 60 days How long would the food last 20 more soldiers joined​
larisa [96]

Answer:

If 20 more soldiers join it would last 48 days

Step-by-step explanation:

if 80 soldiers need 84000 food for 60 days it means that in 60 days one soldier eats 84000/80= 1050 each

then 1050/60=17.5 meaning they need 17.5 food a day each,

adding 20 soldiers means 80+20= 100 soldiers

100*17.5=1750 food is eaten every day

84000/1750= 48 which means that 100 soldiers will eat 84000 in 48 days

5 0
2 years ago
Janella is using this model of two squares and a right triangle to prove the Pythagorean Theorem.
anyanavicka [17]

9514 1404 393

Answer:

  see below

Step-by-step explanation:

Janella could draw a square of side length 'c' attached to the figure on the side labeled 'c'.

3 0
2 years ago
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