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Semenov [28]
4 years ago
8

The expression −8x3(7x6 − 3x5) is equivalent to?

Mathematics
1 answer:
Mama L [17]4 years ago
3 0

Answer:

-56x^9+24x^8

Step-by-step explanation:

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It cost $19.50 for 3 t-shirts.what is the cost of 4 -t shirts
schepotkina [342]

Answer:

i am pretty positive the answer is 26 :)

8 0
3 years ago
Read 2 more answers
Given a triangle has side lengths of 4 inches and 6 inches, which of the following could be a length of the third side? (Check a
Solnce55 [7]
10 inches your hypotenuse is always going to be equal or bigger than the sum of the two sides
3 0
3 years ago
D^2(y)/(dx^2)-16*k*y=9.6e^(4x) + 30e^x
MA_775_DIABLO [31]
The solution depends on the value of k. To make things simple, assume k>0. The homogeneous part of the equation is

\dfrac{\mathrm d^2y}{\mathrm dx^2}-16ky=0

and has characteristic equation

r^2-16k=0\implies r=\pm4\sqrt k

which admits the characteristic solution y_c=C_1e^{-4\sqrt kx}+C_2e^{4\sqrt kx}.

For the solution to the nonhomogeneous equation, a reasonable guess for the particular solution might be y_p=ae^{4x}+be^x. Then

\dfrac{\mathrm d^2y_p}{\mathrm dx^2}=16ae^{4x}+be^x

So you have

16ae^{4x}+be^x-16k(ae^{4x}+be^x)=9.6e^{4x}+30e^x
(16a-16ka)e^{4x}+(b-16kb)e^x=9.6e^{4x}+30e^x

This means

16a(1-k)=9.6\implies a=\dfrac3{5(1-k)}
b(1-16k)=30\implies b=\dfrac{30}{1-16k}

and so the general solution would be

y=C_1e^{-4\sqrt kx}+C_2e^{4\sqrt kx}+\dfrac3{5(1-k)}e^{4x}+\dfrac{30}{1-16k}e^x
8 0
3 years ago
if your car gets 28 miles per gallon, how much does it cost to drive 310 miles when gasoline cost $3.50 per gallon?
Butoxors [25]
Hi,


Work:

28miles = 1gallon

To find the cost of gallons spend for 310 miles you need to first find the amount of gallons consumed on 310 miles path.

310 \div 28 = 11.07gallons

If each costs 3.5$ you need to multiply gallons with money.

3.5 \times 11.07 = 38.745

You would spend 38.745$ to drive 310 miles.

Hope this helps.
r3t40
3 0
4 years ago
Given: 3x + 1 = -14; Prove: x = -5<br> Statements
WINSTONCH [101]

Step-by-step explanation:

3x + 1 = -14

3x = -14 - 1

3x = -15

x= -15÷3

x= -5

4 0
3 years ago
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