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4 years ago

Solve for y: 2y + 4x = 20

Mathematics

1 answer:

patriot [66]4 years ago

5 0

Answer:

2 x 4 + 4 x 3 = 20

Step-by-step explanation:

i hoped this helped!

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ILL MARK BRAINILEST !! 80 POINTS

Lilit [14]

I think it’s y = (x + 5)² - 9

Hope it helps!!!

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2 years ago

I WILL AWARD BRAINLIEST!! PLEASE HELP!!

Veseljchak [2.6K]

Answer:

$1)\\\large\boxed{x=\dfrac{a+c}{b},\ if\ b\neq0}\\\\2)\\\boxed{if\ a=\dfrac{63b}{23}\ then\ x\ is\ any\ real \ number}\\\\\boxed{if\ a\neq\dfrac{63b}{23}\ then\ x\ not\ exist\ (no\ solution)}$

Step-by-step explanation:

$1)\\a-(a+b)x=(b-a)x-(c+bx)\qquad\text{use the distributive property}\ a(b+c)=ab+ac\\\\a-ax-bx=bx-ax-c-bx\qquad\text{cancel}\ bx\ \text{on the right side}\\\\a-ax-bx=-ax-c\qquad\text{add}\ ax\ \text{to both sides}\\\\a-bx=-c\qquad\text{subtract}\ a\ \text{from both sides}\\\\-bx=-a-c\qquad\text{divide both sides by}\ -b\neq0\\\\x=\dfrac{-a-c}{-b}\\\\x=\dfrac{a+c}{b}$

$2)\\2(3x-5a)+9(2a-7b)+3(5a-2x)=0\\\\\text{use the distributive property}\ a(b+c)=ab+ac\\\\(2)(3x)+(2)(-5a)+(9)(2a)+(9)(-7b)+(3)(5a)+(3)(-2x)=0\\\\6x-10a+18a-63b+15a-6x=0\qquad\text{combine like terms}\\\\(6x-6x)+(-10a+18a+15a)-63b=0\\\\23a-63b=0\qquad\text{add}\ 63b\ \text{to both sides}\\\\23a=63b\qquad\text{divide both sides by 23}\\\\a=\dfrac{63b}{23}\\\\if\ a=\dfrac{63b}{23}\ then\ x\ is\ any\ real \ number\\\\if\ a\neq\dfrac{63b}{23}\ then\ x\ not\ exist\ (no\ solution)$

3 0

4 years ago

Summer looked at the formula for the Pythagorean Theorem, a2 + b2 = c2, she said that it didn’t matter which sides of a right tr

Black_prince [1.1K]

Answer:

Summer is incorrect

Step-by-step explanation:

It definitely matters which side is side "c". Side "c" must be the hypotenuse (the side across from the right angle).

The other two sides are the legs (sides touching the right angle), and either leg can be "a" or "b", but the hypotenuse must be "c".

Take the equation, a² + b² = c², and subtract c² from both sides:

$a^{2} +b^{2} -c^{2} =0$

It won't matter which leg is "a" or "b", because of the commutative property of addition. Note that "a²" and "b²" are added together, and due to the commutative property of addition, we can add in either order and get the same result.

However, since the c² term is connected by subtraction, and subtraction doesn't have a commutative property, it can't be subtracted in any order. Meaning which side it is is important.

6 0

2 years ago

What is the long division for 315 divided by 15

AleksAgata [21]

Simply divide 315 by 15= 21<u />

hard to illustrate but first 31/15= 2 remainder 1
15/15 =1

answer =21
hope this helps

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3 years ago

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which of the following numbers has a value between 1.4 and 1 4/5. A. 1.34. B. 170%

elena-s [515]

B is the answer, 1 4/5 is equal to 1.8 so you are looking for something between 1.4-1.8 and 1.34 is not in that range

5 0

4 years ago

Read 2 more answers