Answer:
9. 9&16
10. 31&45
Step-by-step explanation:
9. L-W=7
2L+2W=50 (system of equations)
L=W+7
2L=-2W+50
L=-W+25
-W+25=W+7
-2W=-18
W=9
L=16
10. x=larger number y=smaller number
x+y=76
x=y+14
x=-y+76
y+14=-y+76
2y=62
y=31
x=45
Number for Breaststroke = 50
Number for Butterfly = 25
Ratio of Breaststroke to Butterfly
= 50 : 25 = 2 : 1.
The ratio value is 2/1.
Answer: 135 minutes
45/7= 6.42857142857
6.42857142857 x 21 = 135
Hi there!
~
(A)
Hope this helped you!
I'm not able to do it but I can tell you how
make the 10a-9 equal 14a-25 solve for that a then use the answer to a to then plug in thst number in all of them and that would be your answer
