Sarah used her calculator to work out the value of a number y.

The answer on her calculator display b

7.8

Complete the error interval for y.

SI

1

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4