and 
use the second expression to calculate the left-hand side of the first equation:
Add 10 to both sides if this equation to get
and divide both sides by 2
this proves that x = 17, give the two initial equations
Answer:
960 metres in 240 seconds.
Step-by-step explanation:
this is because they can run 4 metres every second.
the number of seconds they ran multiplied by the length of their run in a second is your answer.
240 x 4 = 960
Answer:
y= 1/5x + 0.8
Step-by-step explanation:
Hope this helps
Answer:
Question:14
3x4 (for the left square, 3 on the side(width) and 4 on the bottom(length))
3x9 (for the right square, 3 on the side(width) and 4 on the bottom(length))
3x13 (for the entire rectangle)
Question:15
3x10 (for the left, 3 on the side(width) and 10 on the bottom(length))
3x6 (for the right, 3 on the side(width) and 6 on the bottom(length))
Step-by-step explanation:
Here is the set up:
Side 1 is 4x.
Side 2 is 5x + 3
Side 3 is 5x + 1
The perimeter is 102.
Perimeter = side 1 + side 2 + side 3
102 = 4x + 5x + 3 + 5x + 1
102 = 14x + 4
Take it from here.
