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3 years ago

Please help, operation with rational numbers XXIV

Mathematics

1 answer:

kifflom [539]3 years ago

3 0

1. D
2. A
3. 79

I'm not confident with 3 but 1 and 2 are for sure correct

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Three friends attended a carnival. John rode the rollercoaster twice, the bumper cars three times, and the Ferris wheel once. He

Paha777 [63]

Answer:

The system of equations is the option A

Step-by-step explanation:

Let

x ------> the number of tickets for the roller-coaster

y ------> the number of tickets for the bumper

z ------> the number of tickets for the Ferris wheel

we know that

The system of equations is equal to

John

2x+3y+z=42

Darren

3x+y+2z=36

Shelley

x+2y+3z=32

therefore

The system of equations is the option A

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3 years ago

I’m kinda confused. Can someone help.

horsena [70]

Answer:

PQ = $PM\cos MPQ + MQ\cos MQP=2PM\cos MQP$

Step-by-step explanation:

given MQR = 60, PQR = 75

MQP = 75 -60= 15 $QR = ((18(1+\cos 30))^{2}-(2\cos 15)^{2})^{\frac{1}{2}}$

WE KNOW THAT MQR +QRM +QMR = 180

MPQ = MQP AS ANGLE OPPOSITE TO EQUAL SIDES ARE EQUAL

THEREFORE QMR = 90 - 60 = 30

therefore PQM = 75 - 60 = 15

PM = PQ because M is the mid point

therefore PR = PM + $MQ\cos QMR$

PR = $18(1+\cos 30)$

$QR = (PR^{2}-PQ^{2}))^{\frac{1}{2}}$

PQ = $PM\cos MPQ + MQ\cos MQP=2PM\cos MQP$

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3 years ago

What is the common ratio of the geometric sequence 16, 24, 36, 54, ...?

erastovalidia [21]

Answer:

Step-by-step explanation:

16 x 3/2 = 24

24 x 3/2 = 36

36 x 3/2 = 54

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(x + 2)*(x^2 -2*x+4) - (x^3 -12)

Ivahew [28]

Answer:

$\large{ \boxed{ \tt{20}}}$

- Please see the attached picture for full solution!:)

------------ HappY LearninG <3 -----------

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inessss [21]

Answer:

A≈113.1

Step-by-step explanation:

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