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4 votes
Pls help with year 8 maths

Pls help with year 8 maths-example-1
User Daryal
by
7.4k points

2 Answers

6 votes

Answer:

see explanation

Explanation:

Given a point (x, y ) then its distance from the origin is

d =
√(x^2+y^2)

(a) (2, 3 ) , then

d =
√(2^2+3^2)

=
√(4 + 9)

=
√(13) ≈ 3.6 units ( to 1 dec. place )

------------------------------------------------

(b) ( - 5, 7 ) , then

d =
√((-5)^2+7^2)

=
√(25+49)

=
√(74) ≈ 8.6 units ( to 1 dec. place )

-------------------------------------------------

(c) (- 1, 4 )

d =
√((-1)^2+4^2)

=
√(1+16)

=
√(17) ≈ 4.1 units ( to 1 dec. place )

------------------------------------------------------

(d) (- 4, - 5 ) , then

d =
√((-4)^2+(-5)^2)

=
√(16+25)

=
√(41) ≈ 6.4 units ( to 1 dec. place )

User CR Drost
by
8.1k points
4 votes

Answer:

a) 1

b)11

c)4

d)1

I hope it helps you...

User Anson Tan
by
8.5k points

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