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4 years ago

COMBINING LIKE TERMS! I need help!

Mathematics

1 answer:

ASHA 777 [7]4 years ago

5 0

Answer:

- 28a + 18

Step-by-step explanation:

-7a - 12a - 9a = -28a

3 + 15 = 18

-28a + 18

Hope this helps :]

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Solve this equation 5+3=2+21

ss7ja [257]

Answer:

8 ≠ 23

Step-by-step explanation:

. . . . .

5 0

3 years ago

CALCULUS:

slamgirl [31]

Answer:

$E(p)=\frac{p^2}{40-p^2}$

E(3) = 0.29

2. See Below

Step-by-step explanation:

According to the formula we would need the derivative, so lets first calculate the derivative of f(p) given.

The rules to use would be $f(x)=ax^n\\f'(x)=nax^{n-1}$

Also, remember to use chain rule if there is a function inside a function. So we differentiate the "inside" function again.

Now, lets differentiate:

$f(p)=\sqrt{40-p^2}\\f(p)=(40-p^2)^{\frac{1}{2}}\\f'(p)=\frac{1}{2}(40-p^2)^{\frac{1}{2}-1}*(-2p)\\f'(p)=\frac{1}{2}(40-p^2)^{-\frac{1}{2}}*(-2p)\\f'(p)=-\frac{p}{\sqrt{40-p^2}}$

Now, the E(p):

$E(p)=-\frac{pf'(p)}{f(p)}\\E(p)=-\frac{p*(-\frac{p}{\sqrt{40-p^2}})}{\sqrt{40-p^2}}\\E(p)=\frac{p^2}{40-p^2}$

We find E(3) by substituting 3 into "p":

$E(p)=\frac{p^2}{40-p^2}\\E(3)=\frac{3^2}{40-3^2}\\E(3)=\frac{9}{31}\\E(3)=0.29$

When E(p) = 1, it means the price elasticity of demand is "1". It is the called Unitary Elastic Demand. It means that for every unit change in price, there is the same unit change in demand. The changes of demand and price are proportional to each other.

7 0

3 years ago

Simplify. rewrite the expression in the form b^nb n b, start superscript, n, end superscript. b^{-6}\cdot b^{11}

bixtya [17]

This is the concept of indices. To re-write the question as instructed we proceed as follows:
b^-6×b^11
according to the rules of indices, when we multiply the number which have the same base, we add their powers. In our case this will be:
b^-6×b^11
adding their powers we get:
b^(-6+11)
=b^5
the answer will therefore be b^5

7 0

4 years ago

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If you are driving 60km/h and you speed up to 70km/h over a period of 5 seconds, what is

quester [9]

Answer:

fast as heck 0.o (i think 170

Step-by-step explanation:

5 0

3 years ago

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Triangle XYZ with vertices X (1,-2) Y (3,-5) and Z (4,1) translated 5 units left and 3 units up