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3 years ago

Which is the equation of a line that is perpendicular to 6x – 4y = 9?

Mathematics

1 answer:

natulia [17]3 years ago

8 0

6x – 4y = 9

4y = 6x - 9

y = 6/4 x - 9/4

y = 3/2 x - 9/4 this line has slope = 3/2

perpendicular line, slope is opposite and reciprocal so slope of this line = -2/3

answer:

A. y= - 2/3 x - 4 (only this line has slope = -2/3)

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Mackenzie ran the olympic marathon of 26 1/5 miles in a time of 5 4/5 hours. How far did she run in a 1 hour?

padilas [110]

Answer:

Step-by-step explanation:

v=d/t (average velocity equals distance divided by time)

26.2mi/5.8h=4.5mi/h

So Mackenzie runs approximately 4.5 miles in an hour (rounded to nearest tenth of a mile)

8 0

2 years ago

The population of a town doubled every 5 years from 1960 to 1975. What is the percentage increase in population in this period ?

777dan777 [17]

Answer:

Step-by-step explanation:

Let p represent the population

in 1965 → the population becomes 2p

in 1970 → the population becomes 2(2p) = 4p

in 1975 → the population becomes 2(4p) = 8p

p ——————> 100%

8p ————-—-> x%

then

$x=\frac{8p*100}{p}=800$

5 0

3 years ago

(Can someone help I'm taking a math quiz.) Seventy parents showed up for a parent meeting at school. Mrs. Quinn set up 12 tables

il63 [147K]

Answer:

for every 2 tables there are 10 chairs, so for 12 tables there are 60 chairs

4 0

3 years ago

Read 2 more answers

Can someone please help with these

nataly862011 [7]

3. The simplest form of √42 is √42

4. √75

Rewrite 75 as 5^2 * 3

Now you have √(5^2*3)

Pull squared terms out from the radical to get 5√3

3 0

3 years ago

Find the slope of the line.

Anika [276]

The equation for working out the slope of a linear line is: $\frac{y_2 - y_1}{x_2 - x_1}$ , where x and y are the coordinate pairs.

So just pick two of the purple dots on the graph and fill in the equation.

I'll pick the dot that's (-4, 1) and (4, -7).

Now I just do $\frac{7 - 1}{4 - -4}$ , which is just $\frac{3}{4}$ when simplified.

6 0

3 years ago