Helen wrote and solved the equation. x minus 17 = 56. x minus 17 + 17 = 56 minus 17. x = 39. What was Helen’s error?
a. Helen only needed to add 17 to the left side of the equation.
b. Helen should have added 17 to both sides of the equation.
c. Helen’s work is correct.
d. Helen made a subtraction error when subtracting 17 from 56.

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

i would pic false cause it goes down towards negative

step-by-step explanation:

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92