Help plz and explain. ..........

Mathematics

1 answer:

Helga [31]4 years ago

7 0

I worked backwards to solve this question, my explanation and working out is
in the picture. If you need any clarification, just ask in the comments.

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Consider kite FGHJ.

Allushta [10]

<h3>Answer: Choice C. a = 17, b = 6</h3>

Explanation:

A kite is any quadrilateral where we have two pairs of congruent consecutive sides (in contrast to a parallelogram where the opposite sides are congruent). Draw a segment connecting points G and J. Triangle GHJ is congruent to triangle GFJ. We'll use the fact that GH = GF, and also FJ = HJ

So,

GH = GF

2a-4 = 30

2a = 30+4

2a = 34

a = 34/2

a = 17

and

FJ = HJ

3b+6 = 24

3b = 24-6

3b = 18

b = 18/3

b = 6

7 0

4 years ago

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Please help! And explain.

wariber [46]

$\bf \textit{area of a sector of a circle}\\\\
A=\cfrac{\theta r^2}{2}\qquad 
\begin{cases}
\theta=\textit{angle in radians}\\
r=radius\\
----------\\
r=5\\
\theta=\frac{\pi }{4}
\end{cases}\implies A=\cfrac{\frac{\pi }{4}\cdot 5^2}{2}\\\\
-----------------------------\\\\
A=\cfrac{\frac{\pi }{4}\cdot 25}{2}\implies A=\cfrac{\frac{25\pi }{4}}{2}\implies A=\cfrac{\frac{25\pi }{4}}{\frac{2}{1}}\implies A=\cfrac{25\pi }{4}\cdot \cfrac{1}{2}
\\\\\\
\boxed{A=\cfrac{25\pi }{8}}$

4 0

4 years ago

1/2x + 1/3y = 3

masha68 [24]

1/2x + 1/3y = 3

Well, because every answer choice isn't in fraction form, simply multiply EVERYTHING by 6 :)

6(1/2x + 1/3y = 3)

Simplify.

3x + 2y = 18

So, our LAST answer choice is correct.

~Hope I helped!~

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3 years ago

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konstantin123 [22]

Answer:

A (-7,5) . B (10,9) . C (-4,-11

Step-by-step explanation:

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3 years ago

This is Core Focus: Working With Scientific Notation

asambeis [7]