1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ololo11 [35]
3 years ago
13

What's the equation of a line that passes through (-4,-7) and (4,-1)

Mathematics
2 answers:
Alborosie3 years ago
5 0

What's the equation of a line that passes through (-4,-7) and (4,-1)

Answer:

y=-x+3

harina [27]3 years ago
3 0

Answer:

y = 3/4x - 4

Step-by-step explanation:

Slope:

m = (y₂ - y₁) / (x₂ - x₁)

   = (-1 - (-7)) / (4 - (-4))

   = 6 / 8

   = 3/4

y-intercept:

y = mx + b

use the slope above and anyone of the given points to find b. Let's use (4, -1)

(-1) = 3/4(4) + b

-1 = 12/4 + b

- 1 = 3 + b

b = -4

Equation of a line:

y = mx + b

use the m and b from above to form the equation of a line.

y = 3/4x - 4

You might be interested in
What Is the y-intercept of y= 3 -4x?
liq [111]

Answer:

3

Step-by-step explanation:

4 0
3 years ago
A certain brand of automobile tire has a mean life span of 35,000 miles, with a standard deviation of 2250 miles. Assume the lif
yawa3891 [41]

Answer:

Step-by-step explanation:

From the information given:

mean life span of a brand of automobile = 35,000

standard deviation of a brand of automobile = 2250 miles.

the z-score that corresponds to each life span are as follows.

the standard z- score formula is:

z = \dfrac{x - \mu}{\sigma}

For x = 34000

z = \dfrac{34000 - 35000}{2250}

z = \dfrac{-1000}{2250}

z = −0.4444

For x = 37000

z = \dfrac{37000 - 35000}{2250}

z = \dfrac{2000}{2250}

z = 0.8889

For x = 3000

z = \dfrac{30000 - 35000}{2250}

z = \dfrac{-5000}{2250}

z = -2.222

From the above z- score that corresponds to their life span; it is glaring  that the tire with the life span 30,000 miles has an unusually short life span.

For x = 30,500

z = \dfrac{30500 - 35000}{2250}

z = \dfrac{-4500}{2250}

z = -2

P(z) = P(-2)

Using excel function (=NORMDIST -2)

P(z) = 0.022750132

P(z) = 2.28th percentile

For x =  37250

z = \dfrac{37250 - 35000}{2250}

z = \dfrac{2250}{2250}

z = 1

Using excel function (=NORMDIST 1)

P(z) = 0.841344746

P(z) = 84.14th percentile

For x = 35000

z = \dfrac{35000- 35000}{2250}

z = \dfrac{0}{2250}

z = 0

Using excel function (=NORMDIST 0)

P(z) = 0.5

P(z) = 50th percentile

6 0
3 years ago
Solve by factorising x² + 11x + 30 = 0<br> dont get think one could someone explain this please.
nalin [4]

Answer:

x={-5,-6}

Step-by-step explanation:

x²+11x+30=0

x²+5x+6x+30=0 (as 5*6=30 and 5+6=11)

x(x+5)+6(x+5)=0

(x+5)(x+6)=0

so

x+5=0

x+6=0

therefore

x=-5

x=-6

4 0
3 years ago
Read 2 more answers
Plz hurry Which equation is shown on the graph? A. y = x + 2 B. y = 2x C. y = x + 1 D. y = x – 2
Norma-Jean [14]
Cant see the graph so I cant help


3 0
3 years ago
Aneesha travels at a rate of 50 miles per hour. Morris is traveling 3 feet per second less than Aneesha. Which is the best estim
raketka [301]
Aneesha speed in feet/s.

50 miles/h*(5280 feet /1mile)*(1h/3600 s)=73.33 feet/s

speed (Morris)=speed (Aneesha)-3 feet/s
speed (Morrris)=73.33 feet/s-3 feet/s=70.33 feet/s.

Speed Morris=70.33 feet/s.
5 0
3 years ago
Other questions:
  • Convert 150 degrees to radian
    11·1 answer
  • Can anyone please help me
    6·1 answer
  • Problem 3 A bank charges a service fee of $7.50 per month for a checking account. A bank account has $85.00. If no money is depo
    15·1 answer
  • Give an example of when an actual net income would result in a negative number.
    13·2 answers
  • What is the rate of change of the function?<br> -2<br> -1/2<br> 1/2<br> 2
    15·2 answers
  • Helppppppppppppppppppppppppppppppppppppp
    7·1 answer
  • You roll a six-sided die and observe the number showing on the top side when the die comes to rest. What is the probability of o
    9·1 answer
  • Help please and thank u
    10·1 answer
  • Which list below shows the fractions in order from greatest to least?
    12·1 answer
  • You have five gears meshed to each other running in a line. the first gear z=100, second gear z=50, third gear z=200, fourth gea
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!