Determine whether equation is parallel or perpendicular or neither 9x+3y =12 and 12x +4y =7

1 answer:

5 0

The standard linear equation is y=mx+b
To be perpendicular the slope (m) has to be a negative.
reciprocal (2 and -1/2)
To be parallel the slope (m) has to be equal.
So put the equations in standard for
First you get:
3y=-9x+12 and
4y=-12x+7
You then have to divide the terms in front of the y's. You have to divide.
You get:
y=-3x+4 and
y=-3x+7/4
The -3's are the slopes (m)
-3=-3 so:
The lines are parallel

You might be interested in

Evaluate the expression below

IRISSAK [1]

-2 times -2 is 4. 4 times 3 is 12. 5 times 3 is 15. 12-15+8. equals 5

4 0

3 years ago

Can some one tell me which is bigger 5/8 or 0.58.

quester [9]

I always find that decimals are easier to work with so 5/8 as a decimal is 0.625. So 0.625 compared to 0.58 is bigger, so 5/8 is bigger than 0.58. 15% = 0.15 and 1/5 = 0.2 So 1/5 is bigger than 15%

7 0

4 years ago

Can someone tell me what is 0.5 percent of 44$

Alex73 [517]

To get 0.5% of 44

Use a calculator and multiply 44 by 0.5%

You get 0.22

Hope this helps ✌

6 0

4 years ago

Read 2 more answers

Mr.Williams' physical education class lasts 7/8 hour.How many minutes are not spent on instructions . playing game:1/2 , instruc

alexandr1967 [171]

First you would find a common denominator. If 40 is the LCM then you would have to add playing games, instruction,warm-up, and cool-down. Then you will subtract the sum from the total class time and bam! You get your answer!

7 0

3 years ago

Read 2 more answers

At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 75 and a standard dev

AysviL [449]

Answer:

b) Chemistry

Step-by-step explanation:

To compare both scored we need to standardize the scores using the following equation:

$\frac{x-m}{s}$

Where x is the score, m is the mean and s is the standard deviation. So, 82 on chemistry is equivalent to:

$\frac{82-75}{15}=0.4667$

Because the mean of the scores on the chemistry final exam is equal to 75 and the standard deviation is 15

At the same way, 80 on Calculus is equivalent to:

$\frac{80-83}{13} =-0.2308$

Because the mean of the scores on the calculus final exam is equal to 83 and the standard deviation is 13

Now, we can compare the values. So, taking into account that -0.2308 is lower than 0.4667, we can said that the student do better in Chemistry.

5 0

3 years ago