The ratio of boys to girls in a group is 7:1. If there are 42 more boys than girls, work out how many girls there are.

7 girls

Step-by-step explanation:

The ratio of boys : girls = 7 : 1 = 7x : x ( x is a multiplier )

There are 42 more boys than girls, thus

7x = x + 42 ( subtract x from both sides )

6x = 42 ( divide both sides by 6 )

x = 7

Hence

there are 7 girls

and 7x = 7 × 7 = 49 boys

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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