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Gala2k [10]
1 year ago
13

Please help a b c or d

Mathematics
1 answer:
AfilCa [17]1 year ago
4 0

Answer:

c hope this helps have a great day god bless you

Step-by-step explanation:

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You have the choice of logging on at one of two Internet cafés. Their posted rates are as follows: Log-On Café: $5.50 plus $0.15
erastovalidia [21]
1. 5.50 + 0.15 * 45 = 12.25

2. 4 + 0.20 * 45 = 13

So the first option is slightly better, you can save 13-12.25= $0.75.
4 0
3 years ago
What are the coordinates of the vertex of the parabola represent by the equation y=-5x^2+30x-25
Jobisdone [24]

Answer:

The coordinate of the  vertex of the parabola is (h,k) =  (3,20)

Step-by-step explanation:

The given equation of the parabola is y=-5x^2+30x-25

Now, the General Parabolic Equation is of the form:

y = a (x-h)^2 + k, then the vertex is the point (h, k).

Now, to covert the given equation in the standard form:

y=-5x^2+30x-25   = -5(x^2  -6x   + 5)

Using the COMPLETE THE SQUARE METHOD,

-5(x^2  -6x   + 5)  = -5(x^2  -6x  +  (3)^2 +  5  - (3)^2)\\\implies -5(((x^2  -6x +(3)^2)  + 5 - 9)\\= -5((x-3)^3 -4)\\= -5(x-3)^2 + 20

ory = -5(x-3)^2 + 20

⇒The general formed equation of the given parabola is

y  = -5(x-3)^2 + 20

Comparing this with general form, we get

h = 3, k = 20

Hence, the coordinate of the  vertex of the parabola is (h,k) =  (3,20)

5 0
3 years ago
Help me with this!!!
geniusboy [140]

Answer:

-7

Step-by-step explanation:

4 0
3 years ago
Will mark brainliest for whoever answers
Ostrovityanka [42]

Answer:

A

Step-by-step explanation:

A

5 0
2 years ago
Read 2 more answers
Davis Electronics manufactures a certain type of radio that requires 18 working resistors per radio. If one out of 22 resistors
REY [17]

Since One Radio in Davis Electronics requires 18 working resistors, then 2,145 radios will require 18\times2145=38610 resistors.

Now we know that one out of 22 resistors is defective. This means that the number of non defective or perfect resistors in a set of 22 resistors is 21.

So, obviously, if we pick a set of 40,370 resistors then the set of working resistors we will get is 40370\times \frac{21}{22} =38535.

As can be clearly seen from the above calculations the required amount of working resistors is 38610 and the amount of working calculators available to us is 38535.

Thus, since the required amount of working resistors is greater than the amount of working resistors available, 40,370 resistors are not enough to assemble 2,145 radios.

7 0
2 years ago
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