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Leni [432]
3 years ago
5

A computer tech charges a $30 initial fee to come and fix a household computer plus $15 per hour. Which of the following linear

equations does this follow?
Mathematics
1 answer:
kkurt [141]3 years ago
6 0

Answer:

I don't see the choices, but the answer will be  y = 15x + 30, or maybe

c = 15h + 30    with c being the cost, and h being the amount of hours.

Step-by-step explanation:

$30 is a flat rate charged just for showing up, so that value is constant and will not change.  

$15 is the per hour charge, so the total charge will be $30 plus $15 for every hour the tech is there.  The $15 is a constant charge per hour, so let x or h represent the number of hours the tech is there, so the total cost is

c = 15h + 30

Every time h increases by 1, the total cost goes up by $15.

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Calculate the perimeter and area of this shape.
Bond [772]

area = 25.5 cm²

Step-by-step explanation:

i have shown in the image you have to rotate it to see how i worked the area out

i am very sorry i cant work the perimeter out since i have no idea what the length of the two sides of the triangle are . if you need help on understanding how i worked out the area please let me know .

hopefully i was able to help you in half of the question i am sorry for not helping on the perimeter :)

8 0
2 years ago
Two of the 240 passengers are chosen at random. Find the probability that
hjlf

Step-by-step explanation:

there are in total 240 passengers.

out of these 240, there are 150+30=180 passengers that are in holiday.

and 240-180 = 60 passengers are not.

if we pick one passenger then the probability is 180/240 = 3/4 = 0.75 that he/she is on holiday.

remember : desired "events" over total "events".

i)

now we pick 2 passengers.

the probabilty for the first one to be on holiday is again

3/4 or 0.75.

if that event happens, then we have only 179 passengers out of now 239 to be on holiday.

and to pick one out of that pool to be on holiday is then

179/239 = 0.748953975...

and for both events to happen in one scenario we need to multiply both probabilities (it is an "and" relation, while an addition would be for an "exclusive or" relation).

the probabilty that we pick 2 passengers on holiday is

3/4 × 179/239 = 0.561715481... ≈ 0.5617

we cannot simply square the basic probability of 0.75 (0.75² = 0.5625), because that would mean we pick one passenger, then put him back into the crowd, and then pick a second time (with a chance to pick the same person again). like with rolling a die.

but that is not the scenario as I understand it. it is to pick a passenger, then keep that person singled out and pick a second passenger. hence the difference.

ii)

exactly one of the two is in holiday.

that means

either the first one is on holiday and the second one is not, or the the second one is and the first one is not.

now we model this logic statement in probabilty arithmetic.

please note that after the first pull we need to update the numbers for the remaining pool depending on the result of the first pull.

the total remaining is in both cases 239. but either the remaining people on holiday go down to 179 (and not in holiday stays 60), or the remaining people not on holiday go down to 59 (and on holiday stays 180).

so, the first one is on holiday, and the second one is not :

3/4 × 60/239 (remember : "and" relation)

= 3 × 15/239 = 45/239 = 0.188284519...

the first one is not on holiday, and the second one is :

60/240 × 180/239 = 1/4 × 180/239 = 45/239 =

= 0.188284519...

since there is no overlap of the potential events (there is no event that could be in both cases), this is an exclusive or relation, and we can add the probabilities.

so, the probability for exactly one of the picked passengers to be on holiday is

2×0.188284519... = 0.376569038... ≈ 0.3766

8 0
2 years ago
Consider the roller coaster on the track. If you want to increase the kinetic energy of the roller coaster as it proceeds throug
just olya [345]
Make it go higher the height of the roller caster will gain more potential energy than a short so go high
5 0
3 years ago
Read 2 more answers
RSTUV - EABCD. Find AE.
larisa86 [58]

9514 1404 393

Answer:

  AE = 3

Step-by-step explanation:

First of all, we need to find corresponding sides that are defined in both figures. The table below shows the given values.

From the table, we can write the proportion ...

  EA/RS = BC/TU . . . corresponding sides are proportional

  EA/6 = 4/8 . . . . . . . substitute given lengths

  EA = 6(4/8) = 3

The length of AE is 3 units.

3 0
2 years ago
What are the following numbers from least to greatest 14/5, -2.46, -10/4, 2.5
Vera_Pavlovna [14]

Answer:

-2.46, -10/4, 14/5, 2.5.

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
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