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3 years ago

PLEASE HELP !!!!!

Mathematics

1 answer:

Anastaziya [24]3 years ago

8 0

Answer:

-10%

Step-by-step explanation:

price elasticity of demand = % change in demand / % change in price

Here, the "price" changes from 15 to 45, so its percent change is ...

((new value)/(old value) -1) × 100%

= (45/15 -1) × 100%

= 200%

The % change in demand is given as -20%, so the price elasticity is ...

price elasticity of demand = (-20%)/(200%) = -0.10 = -10%

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.Adam is 3 times as old as his sister Naya , in 4 years he will be twice as old as Naya , how old are Adam and Naya now ?

galben [10]

Step-by-step explanation:

The answer is

If naya is 4 years old then 3 times Adam age is 12

After 4 years naya is 8 years old and Adam is 16

We can check it because twice of 8 is 16

So now Adam is 12 years and Naya is 4 years old

5 0

3 years ago

The Davidson Winery is noted for its Regal Champagne. It takes the blending of 1,000 bushels of a mixture of two varieties of gr

aniked [119]

Answer: 600 bushels of 10% alcohol content and 400 bushels of 15% alcohol content.

Step-by-step explanation:

Let we add x quantity of 10% of alcohol content and y quantity of 15% alcohol content for making 12% of alcohol content mixture.

Then according to the question, 10% of x + 15 % of y = 12% of 1000

⇒ 0.1x + 0.15y = 120

⇒ 10x + 15y = 1200

⇒ 2x +3y = 2400 -------- (1)

And, x + y = 1000

⇒ 2x + 2y = 2000 ---------(2)

Equation 1) - equation 2)

We get y = 400

By putting the value of y in equation 1),

⇒2x + 1200 = 2400

⇒ 2x = 1200

⇒ x = 600

Thus, he needs to mix 600 bushel of 10% of alcohol content with 400 bushels of 12% of alcohol content for getting 1000 bushels of 12% of alcohol content.

5 0

3 years ago

What is the sum? StartFraction 3 y Over y squared 7 y 10 EndFraction StartFraction 2 Over y 2 EndFraction.

uranmaximum [27]

You can take LCM and then can add to see what's the sum.

The sum result of given expressions is given by: $\dfrac{5}{y+5}$

<h2>Given that:</h2>

To find sum of $\dfrac{3y}{y^2 + 7y + 10}$ and $\dfrac{2}{y+2}$

<h2>Finding LCM and summing:</h2>

You can take LCM and then can add to see whats the sum.

$\begin{aligned}\dfrac{3y}{y^2 + 7y + 10} + \dfrac{2}{y+2} &= \dfrac{3y}{(y+2)(y+5)} + \dfrac{2}{y+2}\\&= \dfrac{3y + 2(y+5)}{(y+2)(y+5)}\\&= \dfrac{5y+10}{(y+2)(y+5)}\\&= \dfrac{5(y+2)}{(y+2)(y+5)}\\&= \dfrac{5}{y+5}\\\end{aligned}$