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Hatshy [7]
3 years ago
12

There’s this one as well

Mathematics
1 answer:
Doss [256]3 years ago
6 0

Answer:

V= area of cross-section x length

V = 0.5x(8x9) x 11

V = 396cm^3

Hope this helps!

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A motor is 85.4 % efficient: that is, the output is 85.4 % of the input. What is the input if the motor delivers 10.75 hp. ( Rou
Ludmilka [50]

Answer:

12.6 hp

Step-by-step explanation:

Represent the input by n.                              10.75 hp

Then 0.85n = 10.75 hp, and n (the input) is --------------- = 12.6 hp

                                                                           0.85

5 0
4 years ago
3x+2y=23<br> 1/2x-4=y<br><br> What should I do for this one...? I dont really understand
Hitman42 [59]

Since you have y alone on one side of the equation......

Use substitution and plug in 1/2x-4 for y in the other equation.


3x+2(1/2x-4)=23\\

Distribute

3x+x-8=23

Combine like terms

4x-8=23

Add 8 to both sides

4x=31

Divide by 4

and x=31/4

Plug this value in for x

31/4*1/2-4=y

Simplify

31/8-4=y

Multiply everything by 8 and simplify

31-32=8y\\-1=8y

Divide.....

y=-1/8


Your answers are:

y=-1/8\\x=31/4



8 0
3 years ago
Solve the system of equations<br> 3x – 2y + 4z = -14<br> -4x + y + 4z = -16<br> -3x - y - 4z = 2
Naddika [18.5K]

Answer:

x,y,x = 2,4, -3

Step-by-step explanation:

8 0
3 years ago
Someone pls help me
evablogger [386]

Answer:

a, f

Step-by-step explanation:

3 0
3 years ago
What is the estimate of 615
Yakvenalex [24]
Estimate to nearest hundreds is 600

Estimate to nearest tens is 610 or 520
8 0
3 years ago
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