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Katena32 [7]
3 years ago
7

- 2y + 7y + 4 Can someone help

Mathematics
1 answer:
sladkih [1.3K]3 years ago
6 0
Hi !
the answer is 5y+4

please let me know if im wrong (:
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500 people fill up 4/9 of the hall. What is the seating capacity of the hall?
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Times that by 9 and you have your answer which is 1125 people.
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What is the y-intercept of the graph?
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Answer:

6

Step-by-step explanation:

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Semielliptical Arch Bridge An arch for a bridge over a highway is in the form of half an ellipse. The top of the arch is 20 feet
photoshop1234 [79]

Answer:

the span of the bridge is 73.7 feet

Step-by-step explanation:

The equation of an ellipse with a vertical major axis(i.e major axis parallel to y axis) is given by:

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

where (h,k) are the coordinates of the center of the ellipse, a is the length of the major axis and b is the length of the minor axis

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Therefore:

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

The top of the arch is 20 feet above the ground level (the major axis), therefore a=20

length of the major axis = 2a= 2*20 = 40

\frac{x^{2} }{b^{2} } + \frac{y^{2} }{20^{2} }= 1\\\frac{x^{2} }{b^{2} } + \frac{y^{2} }{400 }= 1

The coordinates of the ellipse (x,y) = (28,13)

\frac{28^{2} }{b^{2} } + \frac{13^{2} }{400 }= 1

\frac{28^{2} }{b^{2} } + 0.4225= 1

\frac{784 }{b^{2} } = 0.5775

b² ≅ 1358

b≅36.85

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the span of the bridge is 73.7 feet

7 0
3 years ago
Please show the work for it as well thank you
AlexFokin [52]

Answer:

2x^4+4x^2+2

Step-by-step explanation:

f(x) = x^2+1

g(x) = 2x^2

g(f(x))=

Replace x in the function g(x) with the function f(x)

         =2( x^2+1)^2

         = 2( x^2 +2x^2 +1)

         = 2x^4+4x^2+2

       

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3 years ago
What is 48:12 simplified
Zigmanuir [339]
The answer is 4:1

48/12 is 4
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3 years ago
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