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2 years ago

Which function represents a parabola that opens downward and intersects the x-axis at (3,0) and (-4,0)?

Mathematics

2 answers:

Sindrei [870]2 years ago

6 0

It would be C for personal reasons only

Gennadij [26K]2 years ago

4 0

Answer:

Step-by-step explanation:

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Find the derivative of f(x) = -9/x at x = 6

Svet_ta [14]

F(x)=-9/x which is equal to:

f(x)=-9x^(-1) So the power rule for differentiation is used...

Power rule: f(x)=x^e, df/dx=ex^(e-1) so:

df/dx=-9(-1)x^(-1-1)

df/dx=9x^(-2) or if you prefer...

df/dx=9/x^2

df/dx(6)=9/36=1/4

3 0

3 years ago

A bottle contains 255 coins. 1/3 of the coins are ?1.00. 110 of the coins are 50p coins. the rest are 20p coins. work out the to

aliina [53]

Answer:

£152.

Step-by-step explanation:

We have been given that a bottle contains 255 coins. 1/3 of the coins are £1.00.

Let us find 1/3 of 255 to find the number of £1 coins.

$\£1\text{ coins}=\frac{1}{3}\times 255$

$\£1\text{ coins}=85$

This means we have £85.

We are also told that 110 of the coins are 50 p coins.

$\text{Value of 50 p coins}=\£0.50\times 110$

$\text{Value of 50 p coins}=\£55$

Let us figure out number of 20 p coins by subtracting the number of £1 coins and 50 p coins from 255.

$\text{Number of 20 p coins}=255-(85+110)$

$\text{Number of 20 p coins}=255-(195)$

$\text{Number of 20 p coins}=60$

$\text{Value of 20 p coins}=\£0.20\times 60$

$\text{Value of 20 p coins}=\£12$

Now let us find total value of the coins contained in the bottle by adding the values of £1 coins, 50 p coins and 20 p coins.

$\text{The total value of the coins}=\£85+\£55+\£12$

$\text{The total value of the coins}=\£152$

Therefore, the total value of the coins contained in the bottle is £152.

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2 years ago

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Summer vacation is 68 days long and 3/4 of the vacation has gone by. How many days are left? Explain!!

Stells [14]

17 days are left. 68/4*3 gives you that

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3 years ago

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in a sale a store gives a reduction of 25% off the ticket price. a summer coat is marked in the sale at £97.50 how much is the o

eduard

9+10 = 21 you stupid you stupid no I’m not

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2 years ago

Integers -4-(-7)<br><br> How would I do this

alukav5142 [94]

Answer:

Step-by-step explanation:

-4-(-7)=

-4+(7)=

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2 years ago