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polet [3.4K]
3 years ago
9

Students are painting the backdrop for the school play the backdrop is 15 feet wide and 10 feet high every 16 inches on the scal

e drawing represents 5 feet in the backdrop what is the area of the scale drawing
Mathematics
1 answer:
laiz [17]3 years ago
5 0
Actual:
15 ft wide and 10 ft high.

Area = 15ft * 10ft
Area = 150ft²

Scale drawing.
Every 16 inches represent 5 feet in the back drop.

15ft ÷ 5ft = 3 * 16 inches = 48 inches
10ft ÷ 5ft = 2 * 16 inches = 32 inches

Area = 48 in * 32 in
Area = 1536 in²

Area of the scale drawing is 1,536 square inch.
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Write the standard form equation of the ellipse shown in the graph, and identify the foci.
vlada-n [284]

Answer option A

From the given graph is a Vertical ellipse

Center of ellipse = (-2,-3)

Vertices are (-2,3)  and (-2,-9)

Co vertices are (-6,-3) and (2,-3)

The distance between center and vertices = 6, so a= 6

The distance between center and covertices = 4 , so b= 4

The general equation of vertical ellipse is

\frac{(x-h)^2}{b^2} + \frac{(y-k)^2}{a^2}=1

(h,k) is the center

we know center is (-2,-3)

h= -2, k = -3 , a= 6  and b = 4

The standard equation  becomes

\frac{(x+2)^2}{4^2} + \frac{(y+3)^2}{6^2}=1

\frac{(x+2)^2}{16} + \frac{(y+3)^2}{36}=1

Foci  are (h,k+c)  and (h,k-c)

c=\sqrt{a^2-b^2}

Plug in the a=6  and b=4

c=\sqrt{6^2-4^2}

 c=\sqrt{20}

  c=2\sqrt{5}, we know h=-2  and k=-3

Foci  are   (-2,-3+2\sqrt{5})  and  (-2,-3-2\sqrt{5})

Option A is correct

6 0
3 years ago
What is the value of x (81) (7x+15)
scoray [572]

Answer:

9 if I am correct also I rounded to a whole number, am not sure

3 0
3 years ago
Plot G(8,−6) , H(2,−6) , J(7,4) , and K(7,10) in a coordinate plane. Are GH and JK congruent?
Zarrin [17]
GH and JK planes are congruent!

5 0
3 years ago
In a group of 60 students, 18 students take Algebra I, 20 students take Algebra II, and 10 students take both subjects. How many
frosja888 [35]
Your answer is B. 12. 

12 kids are unaccounted for after you subtract the kids that take A1, then A2, the both subjects. 
6 0
3 years ago
What is the side length b in the triangle below?<br> Please help!
pashok25 [27]

Answer:

5

Step-by-step explanation:

This is a special right triangle: 5, 12, 13

Or you can solve using the Pythagorean Theorem (a^2+b^2=c^)

--> 13^2-12^2=b^2

-->169-144=b^2

-->25=b^2

b=5

6 0
3 years ago
Read 2 more answers
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