Answer:
Step-by-step explanation:
Question One
Multiply through by 2
2*1/2 * (2x + y ) = 21/2 * 2
Combine
2x + y = 21
Subtract 2x from both sides
y = 21 - 2x
Now equate the two given equations
y = 21 - 2x
y = 2x
Add 2x to both sides
2x = 21 - 2x
2x + 2x = 21
4x = 21
x = 21/4
x = 5 1/4
or
x = 5.25
Question 2
multiply numerator and denominator of the second fraction by (x + 2)
Remove the numerator brackets in the right hand fraction. Look out for the minus sign.
Answer:
she was left with 28$ I'm in high school i think I'm right
Step-by-step explanation:
I'm guessing you mean laps here
Let's find out how many meters are in a kilometer. Kilo is 1000 more than a single unit, so for every kilometer you have 1000 meters.
so divide 1000/6 to find the amount of laps to swim 1 kilometer
166.6667
Answer:
21:9
Step-by-step explanation:
when you divide 21 and 9 by 3, you get 7 and 3 respectively
Answer:
290/s
Step-by-step explanation:
Basically, the question is asking you to find:
290/s miles per hour
The only problem is translating words to math.
Hope this helps!
