Answer:
Step-by-step explanation:
If two vertices of your triangle touch the circle and the third angle (a right angle located at the center) then x + y + 90 degrees = 180 degrees, or
x + y = 90 degrees.
Answer:
you need to minus it , the answer is 12 , the key word is what percent increase
Step-by-step explanation:
88 - 76 = 12
37.5*0.010=.375 (or press % button on calculator)
80*.375=30
Answer:
![13.51\ \text{s}](https://tex.z-dn.net/?f=13.51%5C%20%5Ctext%7Bs%7D)
Step-by-step explanation:
= Average speed of Sandra = ![7.4\ \text{m/s}](https://tex.z-dn.net/?f=7.4%5C%20%5Ctext%7Bm%2Fs%7D)
= Distance Sandra ran = ![100\ \text{m}](https://tex.z-dn.net/?f=100%5C%20%5Ctext%7Bm%7D)
Time is given by
![t=\dfrac{d}{s}](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7Bd%7D%7Bs%7D)
![\Rightarrow t=\dfrac{100}{7.4}](https://tex.z-dn.net/?f=%5CRightarrow%20t%3D%5Cdfrac%7B100%7D%7B7.4%7D)
![\Rightarrow t=13.51\ \text{s}](https://tex.z-dn.net/?f=%5CRightarrow%20t%3D13.51%5C%20%5Ctext%7Bs%7D)
The time it takes Sandra to run the given distance is
.
Answer:
x² - 4x = 21
x² - 4x - 21 = 0
x² - 7x + 3x - 21 = 0
x( x - 7 ) + 3 ( x - 7 ) = 0
( x + 3 ) ( x - 7 ) = 0
x + 3 = 0 and x - 7 = 0
x = -3 and x = 7