Y10 Recall Questions [3] by Christopher Sewards

chrissewards — 2016-11-07 20:02:26 UTC

chrissewards — 2016-11-07 20:03:10 UTC

chrissewards — 2016-11-07 20:03:59 UTC

Greta

2016-11-09 15:45:59 UTC

324 x 17 = 5,508. 3 significant figures = 5,510
6 x 1.9037 = 11.4222 11.4222 ≈ 11. 4 11.4 < 11.5, therefore In Euros the meal costs less.
3(2x - 5y) - 4(x - y) = 6x - 15y - 4x + 4y = 2x - 11y
6x^2 - 9xy = 3x(2x - 3y)

Josh (is very cool)

2016-11-09 16:44:10 UTC

1. 324 x 17 = 5508
To 3.s.f and standard form = 5.51x10^3

2. €6 x $1.9037 = $11.4222
$11.4222 < $11.5 so the euro is way better for people with less money

3. a) 3(2x-5y)-4(x-y) = 6x-15y - 4x-4y = 2x - 11y
b) 6x^2 - 9xy = 3x(2x - 3y)

Sofia V

2016-11-10 17:56:28 UTC

1. 324 x 17= 5,508
3sf=5510
standard form= 5.51 x 10^3
2. 6/1= 6
11.5/ 1.9037= 6.040867784
Therefore in Euros the meal was cheaper.
3. 2(2x-5y)-4(x-y)
=6x-15y-4X+4y
=2x-11y
4. 6x^2- 9xy
=3x(2x-3y)

Greta (corrected)

2016-11-11 16:11:51 UTC

324 x 17 = 5,508. 3 significant figures = 5,510 standard form= 5.51 x 10^3
6 x 1.9037 = 11.4222 11.4222 ≈ 11. 4 11.4 < 11.5, therefore In Euros the meal costs less.
3(2x - 5y) - 4(x - y) = 6x - 15y - 4x + 4y = 2x - 11y
6x^2 - 9xy = 3x(2x - 3y)

2016-11-12 08:28:35 UTC

Federica

2016-11-12 11:05:58 UTC

1. 324 x 17 = 5.508
Correct to 3 significant figures: 5,510
2. 1.9037 x 6 = 11.422
Round it = 11.4 in euros the meal who cost less
3a. 3(2x - 5y) - 4(x - y)
= 6x - 15y -4x + 4y
= 2x -11y
3b. Factorise completely: 6x^2 - 9xy
= 3x (2x - 3y)

Francesco (the coolest: more than Josh)

2016-11-12 11:31:01 UTC

1. 324 x 17= 5508
3.s.f= 5510
2. €6 x $1.9037= $11.4222
so euros il slightly better
3. 3(2x-5y)-4(x-y)=
=6x-15y-4x+4y=
=2x-11y
b. 6x^2 - 9xy= 3x(2x-3y)

Josh corrected

2016-11-12 11:41:02 UTC

you made a mistake in
3. a) you wrote
=6x-15y-4x-4y while it should be =6x-15y-4x+4y

Sofia F

2016-11-13 11:45:31 UTC

1)
324 x 17 = 5508
to 3 significant figures = 5510
in standart form = 5.51 x 10^3
2)
6 x 1.9037 = 11.4222
11.4 < 11.5
in euro it cost less
3)
a. 3(2x - 5y) - 4(x-y)
= 6x - 15y - 4x + 4y
= 2x - 11y
b. 6x^2 -9xy
= 3x(2x - 3y)

Sam (Even cooler than Francesco)

2016-11-13 13:42:32 UTC

1} 324 x 17 = 5508
to 3 s.f = 5,510
in standard form
5.51 x 10^3

2} 6 x 1.9037 =11.4222 in euros
and 11.5 in Brunei dollars which means it is slightly cheaper to pay in euros
3} a- 3(2x -5y)-4(x - y)
=6x -15y -4x + 4y
=2x - 11 y

3}b-6x^2 - 9xy
=3x(2x - 3y)

Matilda

2016-11-13 15:37:20 UTC

1. 324 x17=5,508
correct to 3 sig. figures
5,510
standard form
5.51 x 10^3

2. 6 x 1.9037=11.4222
11.5 =euros cost less

3a. 3(2x-5y)-4(x-y)
=6x-15y-4x+4y
=2x-11y
3b.6x^2-9y
=3x(2x-3y

Eloi

2016-11-14 11:52:32 UTC

1. 324*17=5,508
to 3sf=5,510
standard=5.51*10^3
2. 6* 1.9037 =11.4222
11.4<11.5
in euros it costs less
3. a) 3(2x-5y)-4(x-y)
=6x-15y-4x+4y
=2x-11y
b) 6x^s-9xy
=3x(2x-3y)

Prabhav

2016-11-14 16:40:52 UTC

1) 324*17= 5508
to 3sf= 5510
2) 6 euros* 1.903= 11.4
Therefore 11.4 euros and 11.5 Brunei dollars
Cheaper in euros.
3)
a) 3(2x-5y)-4(x-y)
= 6x-15y-4x+4y
= 2x-11y
b) 6x^2- 9xy
= 3(2x-3y)

Giacaranda

2016-11-14 17:47:49 UTC

Nicolo petrilli

2016-11-17 18:30:42 UTC

Nicolo

2016-11-17 18:33:27 UTC

1) 324 x 17 = 5,508
3sf =5,510 standard form = 5.51 x 10^3

2) 6* 1.903 = 11.422
11.4 < 11.5
Meaning in euros it's less
3a) 3(2x - 5y) - 4(x - y)
= 6x - 15y - 4x + 4y = 2x - 11y
3b) 6x^2 - 9xy
= 3x(2x - 3y)

Peer

2016-11-17 19:47:10 UTC

sorry for being late