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marusya05 [52]
3 years ago
5

A convex polyhedron is made of 12 congruent faces like the one shown below. What is the name of the solid? A) dodecahedron ANSWE

R: A B) icosahedron C) pentagonal pyramid D) pentagonal prism

Mathematics
1 answer:
Anvisha [2.4K]3 years ago
6 0

Answer: dodecahedron

Step-by-step explanation:

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A dress is on sale for $192. What was the original price of the dress if the discount was 1/5 of the original price?
Alexeev081 [22]

Answer:

$240

Step-by-step explanation:

Let x = the original price:

x - 0.2x = 192

0.8x = 192

x = 240

6 0
2 years ago
Blank divided by 9 equals 6
Airida [17]
X ÷ 9 = 6

Multiply both sides by 9

x ÷ 9 • 9 = 6 • 9

x = 54
4 0
3 years ago
Read 2 more answers
HELPPP <br> I HATE LINKS
scZoUnD [109]

Pretty sure it´s 12.25

61.25 /5=12.5

you can check this by doing 12.5 x 5 ; 15 or 30 and you´ll get the same product in monthly earned

8 0
3 years ago
SUppose the total cost C(x) to manufacture a quantity x of insecticide (in hundreds of liters) is given by
Hitman42 [59]

Answer:

a) C(x) is increasing in two regions: (i) (+\infty, 8\,s) and (ii) (10\,s,+\infty).

b) C(x) decreases in (8\,s, 10\,s).

Step-by-step explanation:

Let C(x) = x^{3}-27\cdot x^{2}+240\cdot x +850, where x is the quantity of insecticide, measured in hundreds of liters, and C(x) is the total manufacturing cost as a function of the quantity of the insecticide, measured in US dollars. A possible approach to determine which regions of C(x) are decreasing and increasing by means of the first derivative and graphing tools. The first derivative of the function is:

C'(x) = 3\cdot x^{2}-54\cdot x+240 (1)

Please notice that regions where C(x) is increasing has C'(x) > 0, whereas C'(x) < 0 when C(x) < 0.

We notice that C(x) is increasing in two regions: (i) (+\infty, 8\,s) and (ii) (10\,s,+\infty). Besides, C(x) decreases in (8\,s, 10\,s).

6 0
3 years ago
A land owner is planning to build a fenced-in, rectangular patio behind his garage, using his garage as one of the "walls." He w
GrogVix [38]

Answer:  800 feet²

Step-by-step explanation:

Lets remove the brackets from the function's expression

A(x) = -2x²+80x

So we got the quadratic function and we have to find the x that corresponds to function's maximum. Let it be X max

As we know Xmax= (X1+X2)/2 , where X1 and X2 are the roots of the function A(x)

Lets find X1 and X2

x(80-2x)=0

x1=0   80-2*X2=0

x2=40

So Xmax= (0+40)/2=20

So Amax= A(20)= 20*(80-2*20)=20*40=800 feet²

3 0
3 years ago
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