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photoshop1234 [79]
3 years ago
12

Can someone please help me with these two parts

Mathematics
1 answer:
alex41 [277]3 years ago
3 0
7a) do 400 take 24 to get 376 then divide that by 4
376 ÷ 4 = 94

so you can fit 94 railroad cars
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Rewrite the function f(x)=2x^2-16x-15 in vertex form
Dmitry_Shevchenko [17]

Answer: y=2 (x-4)^2 -47

and the vertex is (4,-47)

Step-by-step explanation:

your welcome :)

8 0
3 years ago
Two pipes are used to fill a water storage tank. The first pipe can fill the tank in
oksano4ka [1.4K]

Answer:

2 hours for the 2 pipes

Step-by-step explanation:

1 pipe for a tank is 4 hours, but since 2 pipes is 2 hours less, it would take the two pipes together 2 hours

7 0
3 years ago
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An artist created the sculpture shown with concrete. The radius of the bottom hemisphere is double that of the top hemisphere. F
klemol [59]

<u>Answer:</u>

Vt = 4071.5 ft^3

<u>Step-by-step explanation:</u>

Givens:

  • R = 12
  • R = 2r => r = 6

Equations

  1. V = (4/3)(pi)r^3

Find: Vt (Total Volume)

Vt = (1/2)V1 + (1/2)(V2)

Vt = (1/2)(V1 + V2)                 <em>[Factor out (4/3) and (pi) from volumes]</em>

Vt = (1/2)(4/3)(pi)(R^3 + r^3)  <em>[Sub in Values]</em>

Vt = 4071.5 ft^3

5 0
3 years ago
Factor x2 – 6x – 7.
SpyIntel [72]
You can make an cb chart. so to equal -6 you need the numbers -7, 1. so now the equation is ( x - 7 )( x + 1 ). if you want to solve it set it equal to 0 and solve. 
5 0
3 years ago
Luke’s that seven pieces of wood on top of one another if each piece was 4/8 of a foot tall how tall was his pile
Ludmilka [50]

Answer:

6 1/2 feet or 78 inches tall

Step-by-step explanation:

You have to multiply 4/8 by 7/1

First you multiply the nominators: 4 × 7 = 28

Then you multiply the denominators: 8 × 1 = 8

So the fraction would be 28/8 and it simplifies to 7/2

You can turn it into an improper fraction by seeing how many times 2 will go into seven evenly, which would be 6 times with 1 half left over

Therefore it would be 6 1/2 feet or 78 inches tall

8 0
3 years ago
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