Math: section 1
question: 3 of 60
a phone company charges customers a monthly charge using the equation c = 40 + 0.3m, where cis the monthly
charge, in dollars, and m is the number of minutes ed by the customer. if someone's monthly charge is $46, how
many minutes did the person use that month?

20 minutes

Step-by-step explanation:

The monthly charge(C) of the customer is represented by:

C = 40 + 0.3m

where m is the number of minutes used by the customer. We need to find how many minutes did the customer use if the bill is $46. For this we substitute 46 in place of C and find the corresponding value of m.

So,

46 = 40 + 0.3m

46 - 40 = 0.3m

6 = 0.3m

6/0.3 = m

m = 20 minutes

This means the person used 20 minutes which makes the bill equal to $ 46

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.