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2 years ago

GUYS I NEED HELP PLS

Mathematics

1 answer:

grandymaker [24]2 years ago

5 0

Answer:

Since there is no y-intercept start the graph at (0,0)

Plot a point at (0,0)

Move up to 14.25 on the graph since it is the slope

Then move across 1 on the x-axis

This is how you should plot on the graph.

___________________________________________________________

The slope represents the cost per meal plan

Hope this helped! :D

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An electrician charges a flat fee for each job plus an hourly rate . He charged one customer $90 for a job that took him 3 hours

lianna [129]

Answer:

let x equal the service charge.

let y equal the per hour charge.

for the job that cost 450, the equation is 450 = x + 6y

for the job that cost 330, the equation is 330 = x + 4y

these two equations needs to be solved simultaneously.

subtract the second equation from the firs to get 120 = 2y

solve for y to get y = 60.

in the first equation, replace y with 60 to get 450 = x + 6*60.

simplify to get 450 = x + 360.

subtract 360 from both sides of the equation to get 90 = x.

it appears that the service charge is equal to 90 and the per hour charge is equal to 60.

for the job that cost 450, the equation becomes 450 = 90 + 6*60 = 90 + 360 = 450.

for the job that cost 330, the equation becomes 330 = 90 + 4*60 = 90 + 240 = 330.

the numbers check out.

the service charge is 90.

the per hour charge is 60.

i believe your solution is that the electrician charges a flat fee of 90 plus an hourly fee of 60 for a service call.

Step-by-step explanation:

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2 years ago

How do you know if a situation represents<br> a proportional relationship?

kvasek [131]

If the relationship between two quantities is a proportional relationship, this relationship can be represented by the graph of a straight line through the origin with a slope equal to the unit rate. For each point (x, y) on the graph, ž is equal to k, where k is the unit rate. The point (1, k) is a point on the graph.

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HELP! (Urgent pre-calculus question.)

marishachu [46]

2. means that for every x, there is eactly one y
basically, we can use the vertical line test to see if it crosses at any 2 points

first one works
2nd one works
3rd works
4th works
5th works
they are all one to one functions

3.
easy
steps
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replace f(x) with y
switch x and y
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replace y with f⁻¹(x)
so

$f(x)=(1+x)^3-2$
replace
$y=(1+x)^3-2$
switch
$x=(1+y)^3-2$
solve
$x+2=(1+y)^3$
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replace
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first option

4.
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domain is $(-\infty,0) \cup(0,\infty)$
hmm, range
as x approaches negative or positive infinity, f(x)=5
as x approaches 0 from the left, f(x) appraoches negative infintiy
as x approaches 0 from the right , f(x) appraoches positive infintiy
so range is $(-\infty,5) \cup(5,\infty)$

domain is $(-\infty,0) \cup(0,\infty)$
range is $(-\infty,5) \cup(5,\infty)$
answer is the 4th option

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Answer:

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Step-by-step explanation:

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