4 years ago

Need help with 18- 23 . I tried doing them but come up with different answers not on the paper

Mathematics

1 answer:

rjkz [21]4 years ago

8 0

18. 2/7 or b

19. 3/4 or b

20. Unable to see

21. 9/20 or a

22. 1/4 or a

23. 27/35 or b

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Um litro de suco é dividido entre três amigos. O primeiro fica com 14 do todo, o segundo fica com 1/3 do total e o terceiro fica

kkurt [141]

Answer:

a) 1/24 do total

Step-by-step explanation:

We have that:

The total is 1.

The first friend gets 1/4 of the total.

The second friend gets 1/3 of the total

The third friend gets 3/8 of the total.

The remaining is x.

$\frac{1}{4} + \frac{1}{3} + \frac{3}{8} + x = 1$

The least common multiple between 4, 3 and 8 is 24. So

$\frac{6 + 8 + 3*3 + 24x}{24} = 1$

$23 + 24x = 24$

$24x = 1$

$x = \frac{1}{24}$

So the correct answer is:

a) 1/24 do total

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4 years ago

What is the square root of -16? е в -87 0 ООО 8

Monica [59]

$4i$

$i=\sqrt{-1}$

$\sqrt{-16}=\sqrt{-1}*4$

$\sqrt{-16}=i*4$

$4i$

Hope this helps.

頑張って!

8 0

3 years ago

Solve. 2x/21= 32/42 a. 8 b. 27.1 c. 32 d. 16

inna [77]

Answer:

a. 8

Step-by-step explanation:

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3 years ago

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Ilia_Sergeevich [38]

Answer:

x = 2

Step-by-step explanation:

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3 years ago

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5x + 2y = 6 3x + y = 4 Which of the following is part of the solution to the system of equations?

BabaBlast [244]

5x + 2y = 6
3x + y = 4....multiply by -2
-------------
5x + 2y = 6
-6x - 2y = -8 (result of multiplying by -2)
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-x = -2
x = 2

5x + 2y = 6
5(2) + 2y = 6
10 + 2y = 6
2y = 6 - 10
2y = -4
y = -4/2
y = -2 <=== here it is

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4 years ago

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