Four families went out for lunch. The total food bill came to $220. The families also left a $30 tip for the waitress. If each family spent the same amount, about how much did each family spend on dinner? Complete the explanation on how you found your answer.

First, add $
and $30 to find the total bill.

$
is between $
and $
, but closer to $
. $
× 4 = $240, so each family spent about $
on lunch.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?