Decrease £28 by 7%
increase £28 by 7%

decrease = 26.04

increase = 29.96

Step-by-step explanation:

Decrease of £28.00 by 7% = £28 -(7% of 28)

                                             = £28 - (0.07 × 28)

                                             = £28 - 1.96

                                             = £26.04

Increase of £28 by 7% = £28 +(7% of 28)

                                      = £28 +(0.7 × 28)

                                      = $28 + 1.96

                                      = £29.96

Decrease £28 by 7% would be £26.04

and increase £28 by 7% would be £29.96

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

1. 16.64

a^2+b^2=c^2

pr^2=pq^2+qr^2

pr^2=14^2+ 9^2

pr^2=196+81

pr= sqr root of 277

16.64

2. 11.31

c^2-a^2=b^2

18^2- 14^2=b^2

b^2=324-196

b=sqr root of 126

b=11.31

hope it ! (btw im in connections academy to, good luck! )