Answer:
My answer would be y=2x+1
Step-by-step explanation:
In algebraic terms this is:

The integer is 2.
Answer: Ian's height = x+14 = 69+14 = 83 cm
Explanation :
Let the height of Jim be x
Let the height of Ian be x+4
Let the height of Lisa be x+4+10=x+14
Since their heights increase by 2cm every months
so after 7 months ,
Jim's height = x+14
Ian's height= x+4+14=x+18
Lisa's height= x+14+14=x+28
According to question,
Sum of Ian's and Jim's height = 170cm

⇒x = 
⇒ x= 69cm
∴ Ian's height = x+14 = 69+14 = 83 cm
Apply the negative exponent rule, so move the expression to the denominator to make the exponents positive.
Your answer is:
1
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r^7 + s^12