Answer:
Step-by-step explanation:
Charge for additional calls = ( 170 - 150)* 13
= 20* 13
= 260 p = £ 2.60
Charge for additional texts = (182-150)*15
= 32 * 15
= 480 p = £ 4.80
Total charge = 16 + 2.60 + 4.80
= £ 23.40
The first diagram, because there are two of the same inputs (3 has two different outputs)
Step-by-step explanation:
angle measure a =48/2=24°
the arc measure =360°-48°=312°
<h3>stay safe healthy and happy.</h3>
Using Pythagoras theorem :
C = sqrt(a^2 + b^2)
C = sqrt(36+64)
C = sqrt(100)
C = 10 feet
f-¹(x)=![\frac{2-7x}{x+2}](https://tex.z-dn.net/?f=%5Cfrac%7B2-7x%7D%7Bx%2B2%7D)
Answer:
Solution given:
f(x)=![\frac{-2x+2}{x+7}](https://tex.z-dn.net/?f=%5Cfrac%7B-2x%2B2%7D%7Bx%2B7%7D)
Let f(x)=y
y=![\frac{-2x+2}{x+7}](https://tex.z-dn.net/?f=%5Cfrac%7B-2x%2B2%7D%7Bx%2B7%7D)
Interchanging role of x and y
x=![\frac{-2y+2}{y+7}](https://tex.z-dn.net/?f=%5Cfrac%7B-2y%2B2%7D%7By%2B7%7D)
doing crisscrossed multiplication
x(y+7)=-2y+2
now solve it:
xy+7x=-2y+2
keep like terms in one side
xy+2y=2-7x
take common
y(x+2)=2-7x
make a value of y
y=![\frac{2-7x}{x+2}](https://tex.z-dn.net/?f=%5Cfrac%7B2-7x%7D%7Bx%2B2%7D)
So,
f-¹(x)=![\frac{2-7x}{x+2}](https://tex.z-dn.net/?f=%5Cfrac%7B2-7x%7D%7Bx%2B2%7D)