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3 years ago

Find the equation of the line (-4,-7) and (12,1)

1 answer:

3 0

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Kyle wants to find the equation of the line that passes through the points (1, –7) and (–1, 1) .

Harrizon [31]

Answer: Option 'c' is correct.

Step-by-step explanation:

Since we have given that

There are two points as follows:

$(1,-7)\ and\ (-1,1)$

As we know the formula for "Two point slope form":

$m=\frac{y_2-y_1}{x_2-x_1}$

Now, we put the values in the above equation ,

$m=\frac{1+7}{-1-1}\\\\m=\frac{8}{-2}\\\\m=-4$

Now, we use this form " $y=mx+b$ "

So,

$-7=-4(1)+b\\\\-7+4=b\\\\-3=b$

Hence, Option 'c' is correct.

4 0

3 years ago

Jim and his dad are bricklayers. Jim can lay bricks for a fireplace and chimney in 5 days. With his father's help he can build i

kati45 [8]

we are given

Jim can lay bricks for a fireplace and chimney in 5 days

Jim's 1 day work is

$=\frac{1}{5}$

we are given

With his father's help he can build it in 2 days

so, both can do same work in 2 days

so, both's 1 day work is

$=\frac{1}{2}$

Let's assume

his father to build it alone in x days

his father 1 day work is

$=\frac{1}{x}$

so, both's 1 days work is

$=\frac{1}{x}+\frac{1}{5}$

so, we can set it to 1/2

we get

$\frac{1}{2}=\frac{1}{x}+\frac{1}{5}$

now, we can solve for x

$\frac{1}{2}=\frac{5*1}{5*x}+\frac{1*x}{5*x}$

$\frac{1}{2}=\frac{5+x}{5x}$

now, we can cross multiply

$5x=2(5+x)$

$5x=10+2x$

$3x=10$

now, we can solve for x

$x=\frac{10}{3}$

so,

his father to build it alone is

$=\frac{10}{3}days$ ............Answer

8 0

3 years ago

What should I do I don't know if I did it right<br>

yKpoI14uk [10]

Answer:

$\frac{7}{8}$

Step-by-step explanation:

you first need to change the mixed number to an improper fraction

$\frac{13}{8}-\frac{3}{4}$

then multiply the second fraction by 2 so that the denominator is the same in both fractions

$\frac{13}{8} -\frac{6}{8}$

$\frac{7}{8}$

5 0

2 years ago

URGENT! Geometry, I am completely lost

NeX [460]

You are correct. For any polygon, the sum of the exterior angles is 360 degrees. You have the correct equation which leads to the correct answer. Nice work on that.

7 0

3 years ago

13. This month a band has 6 musicians. This is a 50% increase from the

mihalych1998 [28]

There were 4 musicians in the bad last month

7 0

3 years ago