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elixir [45]
3 years ago
8

Please help Solve: 2x2-x = 21

Mathematics
1 answer:
maksim [4K]3 years ago
5 0
The answer is x= -17
hope this helps
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Nancy is making a kite based on the pattern below. About how much binding does Nancy need to cover the edges of the kite?
Ainat [17]

Check the picture below.

so the perimeter of the kite is x+x+y+y, namely 2x + 2y.


\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=\stackrel{hypotenuse}{x}\\ a=\stackrel{adjacent}{8}\\ b=\stackrel{opposite}{15}\\ \end{cases} \\\\\\ x=\sqrt{8^2+15^2}\implies x=\sqrt{289}\implies \boxed{x=17} \\\\[-0.35em] ~\dotfill

\bf \begin{cases} c=\stackrel{hypotenuse}{y}\\ a=\stackrel{adjacent}{8}\\ b=\stackrel{opposite}{4}\\ \end{cases}\implies y=\sqrt{8^2+4^2}\implies y=\sqrt{80}\implies \boxed{y\approx 8.94} \\\\[-0.35em] ~\dotfill\\\\ 2x+2y\implies 2(17)+2(8.94)\implies 51.88\implies \stackrel{\textit{rounded up more}}{51.9}

4 0
4 years ago
the pizza slice served at O'Connor's pizza place are 1/4 of a whole pizza. There are three pizzas ready to be served. 14 childre
Vitek1552 [10]
There are 3 × 4 = 12 pieces total

14 × 1/4 = 3.5 pizzas needed

not enough, you need two more slices
6 0
3 years ago
2 questions i need help with thanks!
aleksley [76]

Answer:

c for both

Step-by-step explanation:

8 0
3 years ago
(6a + 5b + 4c) + (–6c + 15b) + (–8a)
kenny6666 [7]

Answer:

-2a + 20b - 2c

Step-by-step explanation:

(6a + 5b + 4c) + (–6c + 15b) + (–8a) = 6a + 5b + 4c - 6c + 15b - 8a

                                                          = 6a - 8a + 5b + 15b + 4c - 6c

                                                          = -2a + 20b - 2c

6 0
3 years ago
Simplify -2 1/6 -7 1/3
mash [69]

━━━━━━━☆☆━━━━━━━

▹ Answer

<em>-9 1/2 → -9.5</em>

▹ Step-by-Step Explanation

-2 1/6 - 7 1/3

-(2 1/6 + 7 1/3)

-((2 + 7) + (1/6 + 1/3))

-(9 + (1/6 + 1/3))

FINAL ANSWER = -9 1/2

Hope this helps!

- CloutAnswers ❁

Brainliest is greatly appreciated!

━━━━━━━☆☆━━━━━━━

5 0
4 years ago
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