Rick received better results for his maths test than for his english test. if the sum of his two marks is 163 and the difference is 31, find the mark for each subject.

Let x= Maths marks

and y= English marks

Step-by-step explanation:

x + y = 163

x - y = 31

-(x-y) = -(31)

.: 2y = 132

y = 66

.: x - 66 = 31

x = 31 + 66 = 97

.: maths marks= 97

English marks= 66

Step-by-step explanation:

LET MATHS MARKS BE X AND ENGLISH BE Y

GIVEN,

X+Y =1631

X-Y=312

FROM 1 AND 2 ,

2X=194

X= 97

Y=66

x=half

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl