MISSY18 asked:
1.Anita and Joelle bowl together, and their combined total scores for one game was 425 points. Anita’s score was 40 less than twice Joelle’s. What were their scores? Write a system of equations to model the problem if x represents Joelle’s score, and y represents Anita’s score.whats their sores?
2.Elena has bought 320 tropical fish for a museum display. She bought 7 times as many triggerfish as parrotfish. How many of each type of fish did she buy?
BEST ANSWER GETS 10 POINTS.
1. 2x-40=y
2. 40 Parrotfish 280 Triggerfish
y = 2x – 40
425 = x + y
sub in our equation model
425 = x + (2x – 40)
425 = 3x – 40
465 = 3x
155 = x
plug back into orginal equation
425 = 155 + y
270 = y
Joelle scored 270
Anita scored 155
2.
let x = triggerfish and y = parrotfish
320 = x + y
x = 7y
320 = 7y + y
320 = 8y
40 = y
320 = x + 40
280 = x
280 triggerfish
40 parrot fish
425=x+2x-40
425=3x-40
465=3x
x=155
Joelle-155
Anita-270
320=7x+x
320=8x
x=40
parrotfish-40
triggerfish-280
By the way, here’s a little trick. Type in the problem into google word for word, and sometimes it gives you a result with the problem and how to work it out. Hoped I helped you.
1-
Equations:
2x – 40 = y
x + y = 425
Solve:
2x – 40 = y
425 – x = y
2x – 40 = 425 – x
3x = 465
x = 155 *Joelle’s Score
2(155) – 40 = y
y = 270 *Anita’s Score
#2-
320 = 7x + x
320 = 8x
x = 40 *parrotfish
7(40) = 280 *triggerfish
1. A=X J=2X+40
X+2X+40=425
3X=385
X=128.33
Anita=128.33
Joelle=296.67
2. parrotfish=X
triggerfish=7X
7X+X=320
8X=320
X=40
Parrotfish=40
Triggerfish=280