An iron rod of length 25cm weighs 196.5g. What will be the weight of an iron rod of length 1.6m?

1257.6 g

Step-by-step explanation:

1 m = 100 cm

1.6 m = 1.6 * 100 cm = 160 cm

Use a proportion.

196.5/25 = x/160

25x = 196.5 * 160

25x = 31,440

x = 1,257.6

1257.6 g

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

answer:  

123455421

step-by-step explanation: easy