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sammy [17]
2 years ago
5

Which equation represents a line that passes through (–2, 4) and has a slope of 2/5? y – 4 = 2/5 (x 2) y 4 = 2/5 (x – 2) y 2 = 1

/3 (x – 4) y – 2 = 1/3 (x 4)
Mathematics
2 answers:
Natali5045456 [20]2 years ago
7 0
Equation of a line is given by y - y1 = m(x - x1); where m is the slope.
y - 4 = 2/5 (x - (-2))
y - 4 = 2/5 (x + 2)
Alla [95]2 years ago
4 0

Answer:

The required equation of line is:

y-4=\frac{2}{5}(x+2)

Therefore, option 1 is correct.

Step-by-step explanation:

We have been given a slope and a point

And we need to form the equation of line

We will use the formula for equation of line which is:

y-y_1=m(x-x_1)

Where m is the slope of the line.

here, y_1=4,x_1=-2

On substituting the values we get:

y-4=\frac{2}{5}(x-(-2))

y-4=\frac{2}{5}(x+2)

Therefore, the required equation of line is:

y-4=\frac{2}{5}(x+2)

Therefore, option 1 is correct.

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timama [110]

Answer: 2\ minutes

Step-by-step explanation:

We know that:

d=rt

Where "d" is distance, "r" is rate and "t" is time.

Solved for the time "t":

t=\frac{d}{r}

The first step is to convert the distance from miles to feet.

Since 1\ mile=5,280\ feet, we get:

d=(0.2\ mi)(\frac{5,280\ ft}{1\ mi})\\\\d=1,056\ ft

Knowing that:

r=8.8\ \frac{ft}{s}

We can substitute values into t=\frac{d}{r} in order to find the time in seconds:

t=\frac{1,056\ ft}{8.8\ \frac{ft}{s}}\\\\t=120\ s

Since:

1\ minute = 60\ seconds

The time in minutes is:

t=(120\ s)(\frac{1\ min}{60\ s})\\\\t=2\ min

7 0
2 years ago
In 2004, a magazine's circulation was about 1,000,000 readers. In 2014, the magazine had about 2,000,000 readers. Write a linear
professor190 [17]

Answer:

r(t)=100,000t+600,000

Step-by-step explanation:

Let

r ----> the number of readers (y-coordinate or dependent variable)

t ----> the number of years after 2000 (x-coordinate or independent variable)

Remember

2004 ----> represent t=4 years

2014 ----> represent t=14 years

we have the ordered pairs

(4,1,000,000) and (14,2,000,000)

step 1

Find the slope

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

m=\frac{y2-y1}{x2-x1}

substitute the values

m=\frac{2,000,000-1,000,000}{14-4}

m=\frac{1,000,000}{10}

m=100,000\frac{readers}{year}

step 2

Find the equation of the line in point slope form

r-r1=m(t-t1)

we have

m=100,000\\point\ (4,1,000,000)

substitute

r-1,000,000=100,000(t-4)

step 3

Convert to slope intercept form

r=mt+b

isolate the variable r

r-1,000,000=100,000t-400,000\\r=100,000t-400,000+1,000,000\\r=100,000t+600,000

step 4

Convert to function notation

r(t)=100,000t+600,000

6 0
1 year ago
Tracie rides the bus home from school each day. The graph represents her distance from home relative to the number of minutes si
Semmy [17]

Step-by-step explanation:

Tracie’s bus travels towards her home at an average speed of StartFraction one-half EndFraction mile per minute.

4 0
1 year ago
Read 2 more answers
the total reimbursement (in dollars) for driving a company car m miles can be modeled by the function f(x) = 0.45m +5. After a p
Luba_88 [7]

Answer:

The slope becomes 0.5625 and y intercept becomes 12.5.

$65.9375

Step-by-step explanation:

Given that

the total reimbursement function in terms of m miles:

f(x) = 0.45m +5

After the policy change, 5 more dollars are added and then total amount is multiplied by 1.25.

To find:

How to transform the graph of f.

Total reimbursement for a trip of 95 miles?

Solution:

f(x) = 0.45m +5 can also be written as:

y = 0.45m +5

It is nothing but slope intercept form, comparing with Y = M X+ C

M is the slope and C is the y intercept.

Slope of the graph is 0.45.

Y intercept is 5.

After change in the function, first of all add $5.

0.45m +  5+5 = 0.45m+10

Now, multiply with 1.25

Resulting function becomes:

f(x) =1.25\times (0.45m+10)\\\Rightarrow f(x) =0.5625m+12.5

Kindly refer to the attached image for the graph of the two functions.

Now, the slope becomes 0.5625 and y intercept becomes 12.5. This is the transformation.

To find the reimbursement for a trip of 95 miles:

Put m = 95

f(95) =0.5625\times 95+12.5 = \bold{\$65.9375 }

8 0
1 year ago
Gavin has 460 baseball players in his collection of baseball cards,and %15 of the players are pitchers.How many pitchers are in
Yanka [14]
460 times 0.15
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3 0
1 year ago
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