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Studentka2010 [4]
3 years ago
7

30 POINTS!

Mathematics
2 answers:
Alona [7]3 years ago
8 0

Answer:

Area = 3,656.6 m²

Step-by-step explanation:

Area enclosed by the track is composed of two semicircles and a rectangle.

Area = area of two semicircles + area of rectangle

= 2(½*πr²) + L*W

Where,

radius of semicircle (r) = ½of 40 m = 20 m

Length of rectangle (L) = 60 m

Width of rectangle (W) = 40 m

Plug in the values

Area = 2(½*π*20²) + 60*40

Area = 400π + 2,400

Area = 3,656.6 m² (aooroximated to nearest tenth)

Hoochie [10]3 years ago
4 0

Answer:

The mathematics bro xD

Step-by-step explanation:

You might be interested in
50 POINTS PLEASE HELP
MrMuchimi

Answer:

  • ∠ZXW and ∠ZXY are right angles

Step-by-step explanation:

  • <em>Two right triangles are congruent if the hypotenuse and one corresponding leg are equal in both triangles</em>

<u>We have indication of:</u>

  • WZ = YZ
  • ZX is common leg

Missing information is just confirmation that both of them are right triangles

<u>This is:</u>

  • ∠ZXW and ∠ZXY are right angles

Correct answer option is B

7 0
3 years ago
If f(x)=5x+a and f-1(10)=-1, find a
zhenek [66]

Answer:

15

Step-by-step explanation:

Given the function

f(x)=5x+a

and f^{-1} (10)=-1(f^{-1} \text{is the inverse function of f})

let f(x)=y

Substitute in f(x)

y=5x+a\\y-a=5x\\x=\frac{y-a}{5}

From the definition inverse function

if f(x)=y    ⇒   f^{-1} (y)=x

Substitute this in the above expression

f^{-1} (y)=\frac{y-a}{5}

Substitute y=10

⇒

f^{-1} (10)=\frac{10-a}{5}\\-1=\frac{10-a}{5}\\-5=10-a\\a=10+5\\a=15

Therefore a=15

4 0
3 years ago
Dsfsdfsdfsdfdfsdfwekjlfsdf
Verizon [17]

Answer:

SDFGHJKLJJS HI

Step-by-step explanation:

8 0
2 years ago
Log7 (-5k-3)=log7 -4k
exis [7]

Answer:

k = -3

Step-by-step explanation:

log7(-5k - 3) = log7 (-4k)

---> -5k - 3 = -4k

-k - 3 = 0

k = -3

5 0
3 years ago
Brooklyn Middle School has 345 students. The principal is planning a field trip. If 60% of the school will be going on the field
Studentka2010 [4]
207 students will attend the trip
5 0
3 years ago
Read 2 more answers
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