Answer:
176 seconds
Step-by-step explanation:
By using regression line calculator,
Equation of the line of best fit will be,
T = -12.55x + 276.52
Here , T = time taken to cover one lap
x = Age
If the age of Marsha's son is 8 years then expected time taken by her son to cover one lap will be,
T = -12.55(8) + 276.52
T = -100.4 + 276.52
T = 176.12 seconds
Therefore, approximate time taken by Marta's son will be 176 seconds.
Well...
ABC = 53 degrees
Because;
Add 40 and 13.
(4/5)(1/2)=4/10=2/5
...............................
Answer: ![3\sqrt{10}](https://tex.z-dn.net/?f=3%5Csqrt%7B10%7D)
Step-by-step explanation:
By the geometric mean theorem,
![\frac{y}{3}=\frac{27}{y}\\y^{2}=81\\y=9](https://tex.z-dn.net/?f=%5Cfrac%7By%7D%7B3%7D%3D%5Cfrac%7B27%7D%7By%7D%5C%5Cy%5E%7B2%7D%3D81%5C%5Cy%3D9)
So, by the Pythagorean theorem,
![3^{2}+9^{2}=z^{2}\\90=z^{2}\\z=\boxed{3\sqrt{10}}](https://tex.z-dn.net/?f=3%5E%7B2%7D%2B9%5E%7B2%7D%3Dz%5E%7B2%7D%5C%5C90%3Dz%5E%7B2%7D%5C%5Cz%3D%5Cboxed%7B3%5Csqrt%7B10%7D%7D)
the answer is 89
Step-by-step explanation:
it does not matter if the number is negative the absolute value is the number inside the lines