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3 years ago

What is y-2=-3x(x-7) written in standard form?

Mathematics

1 answer:

Len [333]3 years ago

8 0

Answer:

The equation in standard form is

−

Explanation:

The standard form for a linear equation is

, where

and

are numbers, and

and

are variables.

−

Subtract

from both sides of the equation.

−

Multiply both sides by

−

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A house has increased in value by 27% since it was purchased. If the current value is $254,000 , what was the value when it was

Westkost [7]

$254,000 x 0.27= $68,580
$254,000 -$68,580 = $185,420

3 0

4 years ago

Paul has 2/3 as many postcards as Shawn. The number of postcards Shawn has is 4/5 of the number of postcards Tim has. If the thr

ahrayia [7]

Tim has 56 more postcards than Paul.

Step-by-step explanation:

Total postcards boys have = 280

Let,

x = Paul's postcards

y = Shawn's postcards

z = Tim's postcards

According to given statement;

x + y + z = 280 Eqn 1

$x=\frac{2}{3}y$ Eqn 2

$y = \frac{4}{5}z$ Eqn 3

Putting value of y from Eqn 3 in Eqn 2

$x=\frac{2}{3}*\frac{4}{5}z\\\\x=\frac{8}{15}z$ Eqn 4

Putting value of x and y from Eqn 4 and Eqn 3 in Eqn 1

$\frac{8}{15}z+\frac{4}{5}z+z=280\\\\\frac{8z+12z+15z}{15}=280\\\\\frac{35z}{15}=280\\\\$

Multiplying both sides by $\frac{15}{35}$

$\frac{15}{35}*\frac{35}{15}z=280*\frac{15}{35}\\z=120$

Putting z=120 in Eqn 3

$y=\frac{4}{5}*120\\y=96$

Putting y=96 in Eqn 2

$x=\frac{2}{3}*96\\x=64$

Difference of Tim and Paul = 120-64 = 56

Tim has 56 more postcards than Paul.

Keywords: linear equation, substitution method

Learn more about substitution method at:

#LearnwithBrainly

7 0

3 years ago

after every eighth visit to a restaurant you receive a free beverage.after every tenth visit you receive a free appetizer. if yo

Alik [6]

On the 40th and the 80th you will receive both a free beverage and a free appetizer. You can find this by simply finding the multiples of both number up to 100 (or a little more than 100) to find out on which dates you'd get bothe an appetizer and beverage for free. Here are the multiples of both, to prove this answer.

8: 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104.
10: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

Thus making 40 and 80 the answers. I hope this helps!

3 0

3 years ago

4 x y -7y +9 x y + 12y

yulyashka [42]

Answer:13xy+5y

Step-by-step explanation:

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4 years ago

Toni can carry up to 22lb in her backpack,her lunch weighs 1 lb,her gym clothes weighs 3lb and her books (b) 3lb each.how many b

Nadusha1986 [10]

The answer is 6 books

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3 years ago