Me im confused levi earns $6.25 per hour working after school. he needs at least $143.75 for a stereo system. how many hours h does he have to work to reach his goal?

h/6.25 > 143.75; h > 23; 23 hours
6.25h ≤ 143.75; h ≤ 23; 23 hours
h/6.25 < 143.75; h < 23; 23 hours
6.25h ≥ 143.75; h ≥ 23; 23 hours

6.25h ≥ 143.75; h ≥ 23; 23 hours

Step-by-step explanation:

Levi earns $6.25 per hour after school. Since he needs at least $143.75 to get a stereo the amount he wants should be equal to or greater than  $143.75.

Let

h = number of hours worked

The expression can be written as follows:

6.25 × h ≥  143.75

6.25 h ≥  143.75

divide both sides by 6.25

h ≥ 143.75/6.25

h ≥ 23 hours

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

the correct answer is

c. 4

step-by-step explanation:

the given polynomial is

the degree of the polynomial is the highest exponent which is 4.

the -4 is called the leading coefficient.

this polynomial has only one term so it is a monomial.

the correct answer is option c.