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3 years ago

10

Help please? Giving brainliest and points! Please explain!

2 answers:

skelet666 [1.2K]3 years ago

8 0

A, because $1.68 per mile is your rate, and since you don't know how many miles you will be going, you represent it with x. The initial fee of $2.15 is added to $1.68x so you can get your total cost. If you went 8 miles, your equation would be $1.68(8)+$2.15, however since there isnt a specific number of miles, we will use x.

IRINA_888 [86]3 years ago

3 0

The initial fee is the base, so that will not change.

Without knowing how many miles you're going you need x to substitute them, so the equation would be (using slope intercept form)

y= 1.68x + 2.15

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The graph shows the cost of some taxi journeys<br><br> work out a formula for c in terms of n

Vitek1552 [10]

Answer:

$c=\frac{3}{5}(n)+2.5$

Step-by-step explanation:

see the attached figure to better understand the problem

Let

c -----> the cost of some taxi journeys

n ----> the number of miles

we know that

The graph is a line

The equation of a line in slope intercept form is

$c=m(n)+b$

where

m is the slope

b is the c-intercept (value of c when the value of n is equal to zero)

Observing the graph we have the points

(0,2.5), (5,5.5)

<em>Find the slope</em>

The formula to calculate the slope between two points is equal to

$m=\frac{c2-c1}{n2-n1}$

substitute the values

$m=\frac{5.5-2.5}{5-0}$

$m=\frac{3}{5}$

we have

$b=2.5$ -----> because the point (0,2.5) is the c-intercept

substitute in the equation of slope-intercept form

$c=\frac{3}{5}(n)+2.5$

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

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kotykmax [81]

Answer:

$y = -3$

$x=2$

Step-by-step explanation:

$3x + 2y = 0$

$x - 5y=17$

to use the elimination you have to make one of the numbers same

so

$3(x-5y=17)$

and you would have to change the sign so that both of the 3x could cancel out.

New system of equation

$3x + 2y = 0$

$-3x+15y=-51$

$17y=-51$

$y = -3$

so we know the y value so now you could find the x value take one equation

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$x +15=17$

$x = 2$

you could try it with both of the equations

$3x + 2y = 0$

$3x + - 6=0$

$3x-6=0$

$3x=6$

$x=6/3$

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6 0

3 years ago