At a rap concert, the ratio of the number of boys to the number of girls is 9: 5. If there are 320 more boys than girls, how many boys and how many girls are at the concert?

177.78

Step-by-step: Let's solve your equation step-by-step.

9

5

=

320

x

Step 1: Cross-multiply.

9

5

=

320

x

9*x=(320)*(5)

9x=1600

Step 2: Divide both sides by 9.

9x

9

=

1600

divided by 9 which will give you 177.78

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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