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3 years ago

What is the image of (-1, 1) after a dilation of 2? (1, 3) (-2, 2) (2, 2)

1 answer:

3 0

Answer: (-2,2)

Simply multiply each coordinate by 2
x = -1 ---> x = -2
y = 1 ---> y = 2

Note: this is assuming that the center of dilation is the origin (0,0)

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Find f(x) of -n^2 -3n if x is -5

dangina [55]

Answer:

-40

Step-by-step explanation:

f(5)= -(5)^2-3(5)

-25-15=-40

5 0

3 years ago

Find the sum of the roots of the quadratic x^2 + 7x - 13 = 0

Hoochie [10]

Answer:

-7

Step-by-step explanation:

You use the quadratic formula of $ax^{2} +bx+c = 0$ to get:

a = 1

b = 7

c = -13

then you plug that into x= (-b ± √b²-4ac)/(2a) :

x= ( -7 ± √7²- 4(1)(-13) )/(2(1))

$x=-\frac{7}{2} + \frac{\sqrt{101}}{2} \\\\x=-\frac{7}{2} - \frac{\sqrt{101}}{2}$

The sum of these two x values turns out to be:

$x=-\frac{7}{2} + \frac{\sqrt{101}}{2}+( -\frac{7}{2} - \frac{\sqrt{101}}{2} )= -\frac{14}{2} = 7$

6 0

2 years ago

What is the interquartile range of the sequence 5,5,8,8,13,14,16,16,19,22,23,27,31 ?

Romashka-Z-Leto [24]

Answer:

The Interquartile range is 10.

Step-by-step explanation:

First, we will need to find the mean, the mean of this sequence is 16, you will now need to find quartile 1 and quartile 3. Quartile 1 is 13, and quartile 3 is 23. Lastly, subtract Quartile 3 and Quartile 1 will be the answer.

So, 23-13=10

The Answer will be 10, the interquartile range is 10.

Hope this helps!

4 0

2 years ago

The local high school is hosting the last soccer game. They charged adults, x, $5 to enter, and $3 for students, y. It cost the

marin [14]

Answer:

Step-by-step explanation:

5*30+3*45>300

150+135

30+45=75

6 0

2 years ago

Read 2 more answers

A car travels m miles per hour. Which variable expression represents the number of miles traveled in 8 hours?

insens350 [35]

Answer:A Idk if this is right!

6 0

2 years ago