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3 years ago

Which is the correct simplified version of the expression -7(2x-3)

Mathematics

1 answer:

satela [25.4K]3 years ago

7 0

A. -14x+21

because -7 times 2x is -14x and -7 times -3 is 21

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Dana reflects point A(2,5) across line small script letter lℓ to get image point Upper A primeA′(6,1). What is an equation for

valentinak56 [21]

Firstly, we will draw diagram of the scenario

Dana reflects point A(2,5) across line small script letter lℓ to get image point Upper A primeA′(6,1)

It means that AA' is perpendicular bisects of line(l)

so, let's assume it intersects at point M

so, M will be mid-point between A and A'

$M=(\frac{2+6}{2},\frac{5+1}{2})$

$M=(4,3)$

M is a point on line (l)

now, we will find slope of line on AA'

x1=2 , y1=5

x2=6 , y2=1

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

now, we can plug values

$m=\frac{1-5}{6-2}$

$m=-1$

now, we know that line (l) and AA' are perpendicular to each other

so, slope of line(l) is -1/m

slope=1

so, we have slope and a point

$m=1$

$M=(4,3)$

now, we can use point slope form of line

$y-y_1=m(x-x_1)$

now, we can plug values

$y-3=1(x-4)$

$y=x-1$

so, the equation of line (l) is

$y=x-7$ ..............Answer

7 0

3 years ago

Read 2 more answers

30% discount at $300 purchase is

Molodets [167]

Answer:

Thus, a product that normally costs $300 with a 30 percent discount will cost you $210.00, and you saved $90.00. You can also calculate how much you save by simply moving the period in 30.00 percent two spaces to the left, and then multiply the result by $300 as follows: $300 x .

Step-by-step explanation:

3 0

3 years ago

Helppp btw the number are (0,5) (2,2) (3,1) (4,-1)

boyakko [2]

Your answer is (3,1) because if you graph the line that is the on off the line the other follow through

4 0

4 years ago

Please look at the image and answer it correctly

Vaselesa [24]

Answer:

Its B

Hope it helps!......

8 0

3 years ago

Read 2 more answers

You are training to compete in a 10-kilometer race, and you know the circular running trail at your park is one mile long. How m

iren [92.7K]

So to run 10km, you need to run 6.25 times the trail. (Or 7 if you only accept whole numbers as answers, we need to round up).

<h3>How many times will you need to run this trail in order to run 10 kilometers?</h3>

If you run the trail x times, then you will run:

y = x*1mi

Now remember that:

1 mi = 1.6 km

Replacing that, we get the linear equation:

y = x*1.6km

Now we want to find the value of x such that:

x*1.6km = 10km

Dividing both sides by 1.6km

x = 10km/1.6km = 6.25

So to run 10km, you need to run 6.25 times the trail. (Or 7 if you only accept whole numbers as answers, we need to round up).

If you want to learn more about linear equations:

brainly.com/question/1884491

#SPJ1

5 0

2 years ago