At Rome in 1987 Candian Ben Johnson reduced the world record time for 100m, 9.93 seconds, by 1%. What was the new world record (correct to 2 decimal places).

new record for 100m is 9.83seconds

Step-by-step explanation:

1% decrease = 1/100 × 9.93 seconds

=0.0993

New record = 9.93-0.0993

9.83 seconds

Step-by-step explanation:

Reduced by 1% means 99% of the previous

(99/100)×9.93 = 9.8307

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1