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3 years ago

To which set or sets does -20 belong?

Mathematics

2 answers:

il63 [147K]3 years ago

8 0

Answer:

B: integer and rational number

Step-by-step explanation:

whole numbers: 0, 1, 2, 3, 4, ...

integer: ..., -4, 3, -2, 1, 0, 1, 2, 3, 4, ...

rational number: any number that can be written as a fraction of integers

Answer: B: integer and rational number

Tema [17]3 years ago

5 0

Answer:

B and C.

Step-by-step explanation:

-20 is a negative integer.

It is also rational.

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Read 2 more answers

There are 3 people pulling on an object, the first person pulls with a force of 226 newtons at a direction of 145 degrees the se

Alona [7]

Answer:

$R=883.74N$

Step-by-step explanation:

From the question we are told that:

Force 1 $F_1=226N$

Force 2 $F_2=331N$

Force 3 $F_3=377N$

Direction 1 $\theta_1=145 degrees \approx 35 \textdegree (2nd qudrant)$

Direction 2 $\theta_2=303 degrees \approx 57 \textdegree (3rd qudrant)$

Direction 3 $\theta_3=77 degrees$

Generally Resolving forces to X axis is mathematically given by

$\sum f_x=337cos77+331cos57+226sin35$

$\sum f_x=351.596N$

Generally Resolving forces to Y axis is mathematically given by

$\sum f_y=337sin77+331sin57+226cos35$

$\sum f_x=810.788N$

Generally the equation for Resultant force R is mathematically given by

$R=\sqrt{\sum f_x^2+\sum f_x^2}$

$R=\sqrt{351.596^2+810.788^2}$

$R=883.74N$

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