Original price is $16.45, markdown is 33%. The sales price is (only use numbers): $

Mathematics

1 answer:

brilliants [131]2 years ago

3 0

Answer:

$11.02

Step-by-step explanation:

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Ben has 3 times as many guppies as goldfish if he has a total of 20 fish how many guppies does have?

kondor19780726 [428]

Guppies: u
Goldfish: o

3 times as many guppies as goldfish
3*o = u (there are more guppies than goldfish)

o + u = 20
o = 20 - u

Substitute in (20 - u) for o in the first equation and solve:
3* (20 - u) = u
60 - 3u = u
60 = 4u
u = 15

He has 15 guppies. Then substitute in the number of guppies into either equation to find the number of goldfish:
o + u = 20
o + (15) = 20
o = 5

Hope this helps! :)

4 0

2 years ago

Write an equation for a line that is parallel to 2x+5y=15 and passes through the point (-10, 3)

Lyrx [107]

Answer:

The equation of the line is,

$y = - \frac{2}{5} x - 1$

Step-by-step explanation:

First, you have to write it in a form of y = mx + b :

$2x + 5y = 15$

$5y = 15 - 2x$

$y = 3 - \frac{2}{5} x$

$y = - \frac{2}{3} x + 5$

When both lines are parallel to each other, they will have to same gradient value. So the equation of the line is y = (-2/5)x + b. Next, you have to find the value of b by substutituting (-10,3) into the equation :

$y = - \frac{ 2}{5}x + b$