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3 years ago

12

In the equation y = -2x, if x is doubled, what happens to y? stays the same doubles quadruples unknown, since a value for x is n

ot given

1 answer:

OLEGan [10]3 years ago

3 0

In an equation like that, y would double into 2y. But just keep in mind that what happens to one side must happen to another.

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Look at the image attached below.

SSSSS [86.1K]

Step-by-step explanation:

<u>Step 1: Subtract the first part</u>

<u /> $1\frac{1}{2} - \frac{1}{4}$

$\frac{3}{2} - \frac{1}{4}$

$\frac{6}{4}-\frac{1}{4}$

$\frac{5}{4}$

<u>Step 2: Multiply both to get how much the brother drank</u>

<u /> $\frac{5}{4} * \frac{2}{5}$

$\frac{2}{4}$

$\frac{1}{2} \ L$

Answer: 1/2 Liters

4 0

3 years ago

Read 2 more answers

A fruit stand has to decide what to charge for their produce. They need $5 for 1 Apple and 1 orange. They also need $15 for 3 ap

lakkis [162]

Answer:

x + y = 5

3x + 3y = 15

Step-by-step explanation:

let x represent apple and y represent orange

Hence x + y = 5

and 3x + 3y = 15

Solving both equations simutaneously

From first equation, x = 5-y

Substitute x=5-y into the second equation

3(5-y)+3y = 15

y= 0

x = 5-0 = 5

6 0

3 years ago

Read 2 more answers

There are 30 teams in the NBA. What is the probability of randomly choosing the champion

Ganezh [65]

Answer:

1/30

Step-by-step explanation:

P(champion)= 1/30

5 0

2 years ago

What is the relationship between exponentials and logarithms? How can you use these to solve equations? Provide an example in yo

Sveta_85 [38]

Answer:

Exponentials and logarithms are inverses of each other.

Step-by-step explanation:

Exponentials and logarithms are inverses of each other.

For logarithmic function:

Domain = $\left ( 0,\infty \right )$ , Range = $\left ( -\infty ,\infty \right )$

Vertical asymptote is y - axis.

x - intercept is (1,0)

For exponential function:

Domain = $\left ( -\infty ,\infty \right )$ , Range = $\left ( 0,\infty \right )$

Horizontal asymptote is x - axis.

y- intercept is (0,1)

Both exponential and logarithmic functions are increasing.

For example:

Solve: $\log x=\frac{\log 5+\log 3}{\log 3^2}$

$\log x=\frac{\log 5+\log 3}{\log 3^2}\\\log x=\frac{\log (5\times 3)}{2\log 3}\,\,\left \{ \because \log (ab)=\log a+\log b\,,\,\log a^b=b\log a \right \}\\=\frac{\log 15}{2\log 3}$

$\Rightarrow \log x=\frac{\log 15}{2\log 3}\\\Rightarrow x=e^{\frac{\log 15}{2\log 3}}\,\,\left \{ \because \log x=y\Rightarrow x=e^y \right \}$

4 0

3 years ago

A ladder is leaning against a building.The distance from the bottom of the ladder to the building is 6ft shorter than the length

Akimi4 [234]

Answer:

15 ft

Step-by-step explanation:

Hi, the illustration for the problem is a right triangle with:

hypotenuse (C)= the length of the ladder = L

horizontal side(A) = distance from bottom of the ladder to the building = L - 6

vertical side(B) = distance from the top of the ladder to the bottom of the building = L - 3

So, we can use Pythagoras formula:

A2 +B2= C2

(L – 6 )² + (L-3)² = L²

L²-12L+36+L²-6L+9 =L²

L2 -18L+45 =0

APPLYING QUADRATIC FORMULA WE OBTAIN:

L =15 OR L=3

If L=3

Vertical side = L-3 = 0 (Length can´t be 0)

So L=15

6 0

4 years ago