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3 years ago

Which equation contains the points (-1,-8) and (3,4)

Mathematics

1 answer:

katrin [286]3 years ago

8 0

Answer:

y = 3x –5

Step-by-step explanation:

for slope-intercept form, y = mx + b

find the slope, m

(-8 -4)/(-1-3) = m

-12/-4 =m

3 = m

Substitute for m and use either coordinate for y and x to calculate b

4 = 3(3) + b

4 = 9 + b. Subtract 9 from both sides

4 –9 = b

–5 = b. Rewrite the equation with the calculated values for m and b

y = 3x –5

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Taisha uses the elliptical cross- trainer at the gym. Her general goal is to burn 280 calories per workout, but she varies by as

Fed [463]

Given - Taisha has a general goal is to burn the 280 calories.

she is varies by the 25 calories.

Find out the maximum and minimum of calories burn by the taisha.

To proof -

let us assume that the calories burn by the taisha be x.

as given the calories are varies by the 25 calories.

then the maximum calories equation becomes

x-25 = 280

x = 280 + 25

x = 305

the maximum calories burn by the taisha is 305 calories.

minimum calories equationbecomes

x + 25 = 280

x = 255

The minmum calories burn by the taisha is 255 calories.

Hence proved

8 0

3 years ago

Read 2 more answers

A student charges twenty dollars per hour to type college papers. The student's average typing speed is fifty words per minute.

coldgirl [10]

Answer:

The student should charge $210 for typing the paper ⇒ answer C

Step-by-step explanation:

* Lets explain how to solve the problem

- The rate of the student's typing is 50 words per minute

- The students charges twenty dollars per hour to type the college

papers

- There is a paper contains 31,500 words

- We want to now how much the student should charge for it

* At first lets find his rate per hour

∵ 1 hour = 60 minutes

∴ 1 minute = 1/60 hours

∵ His rate = 50 words / 1 minute

- Lets change the minute to hour

∴ His rate = 50/(1 × 1/60) = 3000 words per hour

* Lets find the time he needs to finish the paper

∵ The paper contains 31,500 words

∵ Time = The number of words ÷ his rate of typing

∵ his rate is 3000 words per hour

∴ Time = 31,500 ÷ 3000 = 10.5 hours

∴ He needs 10.5 hours to finish the paper

∵ He charges $20 per hour

∵ The time to finish the paper is 10.5 hours

∵ The price of typing the paper = the charge per hour × number

of hours

∴ The price of typing the paper = 20 × 10.5 = 210

∴ The student should charge $210 for typing the paper

7 0

3 years ago

Read 2 more answers

The answer of this question

dolphi86 [110]

Answer:

i think it is c

Step-by-step explanation:

not 100% sure tho

4 0

3 years ago

One angle of an isosceles triangle measure 30*. Which other angles could be in that isosceles triangle? Choose all that apply.

Elodia [21]

Answer: 75 degrees

Step-by-step explanation:

75+75+30=180

5 0

3 years ago

MARK AS BRAINLEST

Ierofanga [76]

Answer:

Option C $3n^{2}+n-2$

Step-by-step explanation:

<u><em>Verify each expression</em></u>

case A) we have

$5n^{2}+6n-1$

In this expression the term of n is 6n

has a coefficient of positive 6

case B) we have

$2n^{2}-5n+1$

In this expression the term of n is -5n

has a coefficient of negative 5

case C) we have

$3n^{2}+n-2$

In this expression the term of n is n

has a coefficient of positive 1

case D) we have

$4n^{2}-n+9$

In this expression the term of n is -n

has a coefficient of negative 1

6 0

3 years ago