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Maksim231197 [3]
3 years ago
15

Line n passes through points (7, 12) and (4, 15). What is the slope of a line that

Mathematics
1 answer:
vitfil [10]3 years ago
3 0
So anytime we have a slope and want to find the slope of a perpendicular line, we just have to remember a perpendicular line's slope is the negative reciprocal (reciprocal means flip the fraction). So if we had a slope of 3/4, the slope perpendicular to it would be - 4/3.


First we need to find our slope, to do this we take the change in y over the change in x like so:

(15-12)/(4-7) = - 3/4

The slope perpendicular to this is 4/3.
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PLEASE ANSWER QUICK One year, the population of a city was 164,000. Several years later it was 182,040. Find the percent increas
Katena32 [7]

Answer:

There was an 11% increase.

Step-by-step explanation:

The formula to find a percent increase is this: (original amount - new amount / original amount) * 100

If you fill in the formula, you get this:

(164,000 - 182,040 / 164,000) * 100

Solve:

(-18,040 / 164,000) * 100 ---> If the number being divided is negative, find the absolute value.

(18,040 / 164,000) * 100 =

0.11 * 100

11%

5 0
3 years ago
Boof<br>$543.51 is subtotal.
antiseptic1488 [7]

Answer:

The total of the sales price and sales tax is  $ 588.35 .

Step-by-step explanation:

As given

$543.51 be the subtotal .

8.25% is the sales tax .

8.25% is written in the decimal form.

= \frac{8.25}{100}

= 0.0825

Sales tax price = 0.0825 × 543.51

                         = $ 44.84  (Approx)

Total of sales price with sales tax = Sale price + Sales tax price

Putting the values in the above

                                                       = $543.51 + $44.84

                                                       = $ 588.35

Therefore the total of the sales price and sales tax is  $ 588.35 .

6 0
3 years ago
Math help &lt;3............
Anna007 [38]
1.)18 = 2(4 + x) ||
2.) 18 = 8 + 2x --- Distribute. ||
3.) 10 = 2x --- Isolate the variable by collecting like terms ||
4.) 5 = x 

I'd say A. is a good choice.
8 0
3 years ago
Read 2 more answers
3-2/3= ?<br><br><br> 2/3 is half
Helga [31]
Exact form = 7/3

Decimal = 2.3

Mixed number Form = 2 1/3
8 0
3 years ago
13 percent of what is 78
Brums [2.3K]
13% of what is 78

"what" is the unknown, so use x for what.
"of" in math usually means a multiplication.
"is" means "="

13% * x = 78

0.13x = 78

x = 78/0.13

x = 600

Answer: the number is 600
3 0
3 years ago
Read 2 more answers
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