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3 years ago

Write the equation of the line that passes through the points (-4, -7)

Mathematics

1 answer:

Firlakuza [10]3 years ago

6 0

Step-by-step explanation:

To find the equation of the line in slope intercept form, we must have the slope and the y intercept. Finding the slope is easy:

So now we want the y intercept. We can use either points to do this, so for simplicity let's use the second one since the numbers are smaller. First of all, we have:

y=-3x+b. Plugging in 6 for x and 2 for y we have, 2=-18+b which means b=20. Checking our answer we have:

y=-3x+20 which means 8=-3*4+20, which is true. So our equation is indeed y=-3x+20

PLZ MARK BRAINLEST

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Paul’s dad drives on the highway at an average rate of 70 miles per hour. If the entire trip is driven on a highway, how many dr

tino4ka555 [31]

Answer:

The answer would be based off of how many miles the dad went so if he went to say 140 miles then it would be 2 hours.

Step-by-step explanation:

Just go to your calculator and divide how many miles he went by 70 then it will give you the amout of hours he went.

Have a great day! :)

6 0

3 years ago

Given the function f(x)=2(3x+7)−4(x−2), what would be the value of input, x, if f(x)=18?

Hatshy [7]

Answer: x=-2

Step-by-step explanation:

Given

f(x)=2(3x+7)-4(x-2)

f(x)=18

Use substitution method

2(3x+7)-4(x-2)=18

Expand parenthesis

6x+14-4x+8=18

Combine like terms

2x+22=18

Subtract 22 on both sides

2x+22-22=18-22

2x=-4

Divide 2 on both sides

2x/2=-4/2

x=-2

Hope this helps!! :)

Please let me know if you have any questions

7 0

3 years ago

HELPPPPPPPPPPPPPPPPPP IM DESPERATE

Cerrena [4.2K]

Chandra will have 55 baseball cards

Step-by-step explanation:

Total baseball cards = 152

Let

Chandra's collection = p

Chandra has 42 baseball cards less than Simon so Simon will have 42 cards more:

Simon's Collection = p+42

We need to find Chandra's collection.

Total baseball cards will be 152 so, the equation will be:

$p+(p-42)=152$

Solving and finding value of p (Chandra's card)

$p+p-42=152\\2p=152+42\\2p=110\\p=110/2\\p=55$

So, Chandra will have 55 baseball cards.

Keywords: Word Problems

Learn more about Word Problems at:

#learnwithBrainly

6 0

3 years ago

WILL VOTE BRAINLIEST PLEASE HELP!

DanielleElmas [232]

A.) is the correct answer.

7 0

3 years ago

The sum of two numbers is 72. Their differences is 18.whats the numbers

Vinvika [58]

The two numbers are 45 and 27.

I really hope this helped you! c:

4 0

4 years ago