1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hoa [83]
2 years ago
13

are any two regular polygons similar. The area of the smaller figure is about 390 cm^2. choose the best estimate of the area of

the larger figure

Mathematics
1 answer:
galben [10]2 years ago
4 0

Answer:

The best estimate of the area of the larger figure is 693\ cm^{2}

Step-by-step explanation:

step 1

<em>Find the scale factor</em>

we know that

If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor

Let

z----> the scale factor

x-----> the corresponding side of the larger figure

y-----> the corresponding side of the smaller figure

so

z=\frac{x}{y}

we have

x=12\ cm

y=9\ cm

substitute

z=\frac{12}{9}=\frac{4}{3} -----> the scale factor

step 2

<em>Find the area of the larger figure</em>

we know that

If two figures are similar, then the ratio of its  areas is equal to the scale factor squared

Let

z----> the scale factor

x-----> the area of the larger figure

y-----> the area of the smaller figure

so

z^{2}=\frac{x}{y}

we have

z=\frac{4}{3}

y=390\ cm^{2}

substitute and solve for x

(\frac{4}{3})^{2}=\frac{x}{390}

(\frac{16}{9})=\frac{x}{390}

x=390*16/9=693.33\ cm^{2}

You might be interested in
Jan walks 40 meters in 15 seconds what is her rate?
schepotkina [342]
The answer is 2.67 seconds per second when rounded but 2.66666...
6 0
3 years ago
You draw two marbles without replacement from a bag containing 2 green marbles and 3 black marbles. What are the possible outcom
Step2247 [10]
2 greens
1 black 1 green
2 blacks
Hope this helps ;p have a nice day!

~pam
7 0
3 years ago
What is the prime factorization of 75,29, and 168
Anna35 [415]

Answer:

Step-by-step explanation:

75 = 5 *5* 3

29 is a prime number = 29*1

168 = 2*2*2*3*7

7 0
3 years ago
I need help on this problem can someone help<br><br> -8 (y - 86) = -48
exis [7]

Answer:

y=92

Step-by-step explanation:

Divided both sides by the numeric factor on the left side, then solve.

y = 92

6 0
3 years ago
Pls help trig question!!
s2008m [1.1K]

4\sin^2 x - 3 = 3 \sin x\\\\\implies 4\sin^2 x -3 \sin x  -3 =0\\\\\implies 4u^2 -3u -3 =0~~~~~~~~~~~~~~;[\text{Set} ~ \sin x = u]\\\\\implies u = \dfrac{-(-3) \pm \sqrt{(-3)^2 - 4\cdot 4 \cdot (-3)}}{2(4)}~~~~~~;[\text{Apply quadratic formula}]\\\\\\\implies u = \dfrac{3\pm\sqrt{57}}8\\\\\implies \sin x = \dfrac{3\pm\sqrt{57}}8~~~~~~;[\text{Substitute back}~ u = \sin x]\\\\\text{Now,}\\\\\sin x = \dfrac{3+\sqrt{57}}8\\\\\text{No solution for}~ x\in \mathbb{R}  ~\text{Since}~ -1\leq \sin x \leq 1\\

\sin x = \dfrac{3 - \sqrt{57}}8\\\\\implies x = n\pi + (-1)^n \sin^{-1} \left(\dfrac{3-\sqrt{57}}8\right)\\\\\\\text{ When n = 1,2 and}~  [0,2\pi]},\\\\\\x= \pi - \sin^{-1} \left(\dfrac{3-\sqrt{57}}8 \right)~ \text{and} ~x =  2\pi + \sin^{-1} \left(\dfrac{3-\sqrt{57}}8 \right)\\\\\text{In decimal,}\\\\x= 3.75~~~~ \text{and}~~~ x =5.68

5 0
2 years ago
Other questions:
  • Which statement is true about the extreme value of the given quadratic equation? y=-3x2+12x-33 A. The equation has a minimum val
    13·1 answer
  • What is 5q-4p+6=4q-8
    15·1 answer
  • I need the answer ASAP
    6·1 answer
  • Two triangles are similar. The dimensions of the first are 7, 8, and 10, while the dimensions of the second one are 3.5, 4, and
    6·1 answer
  • 1) x² 2(x+y) - y^2 <br>2) x^4+ x^2y^2+ y^4​
    9·1 answer
  • A number lock has 9 different digits. a combination of three digits can be set to open the lock. how many combinations are possi
    9·1 answer
  • PLZ SOLVE THIS FOR ME!!!!!!!
    15·2 answers
  • Help lol easy
    11·1 answer
  • A convex hexagon has exterior angles that measure 80, 68, 84, 56, and 40. Which of the following the measure of the 6th exterior
    14·1 answer
  • What is the domain and range
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!