Answer:
Nicole is now 15 years old
Christine is now 5 years old
Step-by-step explanation:
x = age Nicole
y = age Christine
x = 3y
x+5 = 2×(y+5) = 2y + 10
3y + 5 = 2y + 10
y + 5 = 10
y = 5
x = 3y = 3×5 = 15
Answer: the height of the television screen is 20 inches
Step-by-step explanation:
The diagram of the rectangular television screen is shown in the attached photo. The rectangle is labelled as ABCD. The diagonal forms a right angle triangle, ABC. This means that angle B is 90 degrees. The height it labelled as h. To determine h, we will apply Pythagoras theorem. Pythagoras theorem is expressed as
Hypotenuse ^2 = opposite ^2 + adjacent ^2
From the diagram,
hypotenuse = 29 inches
Adjacent = 21 inches. Therefore,
29^2 = 21^2 + h^2
h^2 = 29^2 - 21^2 = 841 - 441
h = √400
h = 20 inches
Answer:
The value of f(3)=12.4
Step-by-step explanation:
Average rate of change = 3.4
Interval: -2 < x < 3
f(-2) = 9
We need to find f(3)
The formula used to calculate Average rate of change is: 
here we have a=-2 and b=3
Now finding f(3)

So, The value of f(3)=12.4
Answer:
hope this helps
Step-by-step explanation: