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sasho [114]
2 years ago
7

What is 9x7 equal to i been stuck

Mathematics
1 answer:
ololo11 [35]2 years ago
4 0

Answer:

9x7=63

Step-by-step explanation:

just use a calculator for multiplication

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If f(x) = 2(3x) + 1, what is the value of f(2)?
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F(2)=2(3*2)+1
f(2)=2(6)+1
=13
answer is 13
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3 years ago
HURRY UP YALL FIRST ANSWER GETS BRAINLIESTTT
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3 years ago
jenna brought a spool of ribbon that was 5 3/4 meters long. she used 3 1/4 meters of ribbon for a craft project. how many meters
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Step-by-step explanation:

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8 0
3 years ago
What is the answer to this question?
steposvetlana [31]

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Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Consider the differential equation y'' − y' − 30y = 0. Verify that the functions e−5x and e6x form a fundamental set of solution
Alex Ar [27]

Answer:

Step-by-step explanation:

We have to take the derivatives for both functions and replace in the differential equation. Hence

for y=e^{-5x}:

y(x)=e^{-5x}\\y'(x)=-5e^{-5x}\\y''(x)=25e^{-5x}\\

for y=e^{6x}:

y(x)=e^{6x}\\y'(x)=6e^{6x}\\y''(x)=36e^{6x}\\

Now we replace in the differential equation  y'' − y' − 30y = 0

for y=e^{-5x}:

25e^{-5x}+5e^{-5x}-30e^{-5x}=0\\25+5-30=0

for y=e^{6x}:

36e^{6x}-6e^{6x}-30=0\\36-6+30=0

Now, to know if both function are linearly independent we calculate the Wronskian

W(f,g)=fg'-f'g

W(e^{-5x},e^{6x})=(e^{-5x})(6e^{6x})-(-5e^{-5x})(e^{6x})\neq 0

I hope this is useful for you

Best regard

7 0
3 years ago
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