In a newspaper, it was reported that yearly robberies in Springfield were up 50%to 279 in 2012 from 2011. How many robberies were there in Springfield in 2011.

hi there! here's my answer for you...

There were 186 Springfield robberies in 2011.

hope this helped. i have included a step-by-step explanation below in case you need it. have a good one!

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Think about what happens when you double a number.

You multiply it by 2. Since it's been doubles, we say is has had a 100% increase.

Likewise a 50% increase correlates to multiply by 1.5

Since we are trying to find the previous amount that experienced the increase, we divide by 1.5 to find the original amount because that amount*1.5 gives us 279.

Calling the original r, it is clear that 1.5r=279.

Solving for r, we find the original # of robberies to be 186.

168g

Step-by-step explanation:

We have to split 240g of sweets in the ratio 7:3 where Jordan gets '7' and Liza gets '3'. So the first step in solving ratio problems like this is to add the ratio together because then it gives the total. Then the second step is to divide the 240g by the added ratio which gives how much 1 part is. Finally after we have worked 1 part we multiply it by 7 to calculate the amount Jordan receives so,

→ First step in solving this is to add the ratios

7 + 3 = 10

→ Then the second step is to divide the 240g by the added ratio which gives how much 1 part is.

240 ÷ 10 = 24

→ Finally after we have worked 1 part we multiply it by 7 to calculate the amount Jordan receives

24 × 7 = 168

So Jordan receives 168 grams of sweets