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3 years ago

9

Can someone please help me

1 answer:

Mandarinka [93]3 years ago

4 0

The answer that I got for this problem is 40

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Solve 10e^2x - 5 =23^x for x.

yawa3891 [41]

$10e^{2x}-5=23e^x\qquad\text{subtract}\ 23e^x\ \text{from both sides}\\\\10e^{2x}-23e^x-5=0\\\\10(e^x)^2-23(e^x)-5=0\\\\\text{substitution:}\ e^x=t > 0\\\\10t^2-23t-5=0\\\\10t^2-25t+2t-5=0\\\\5t(2t-5)+1(2t-5)=0\\\\(2t-5)(5t+1)=0\iff2t-5=0\ \vee\ 5t+1=0\\\\2t=5\ \vee\ 5t=-1\\\\t=\dfrac{5}{2} > 0\ \vee\ t=-\dfrac{1}{5} < 0\\\\\text{therefore}\ e^x=\dfrac{5}{2}\to\ln e^x=\ln\left(\dfrac{5}{2}\right)\\\\\boxed{x=\ln\left(\dfrac{5}{2}\right)}$

5 0

3 years ago

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can i help me find four numbers such that when the first of them is divisible by 4, when the second is multiplied by 4, when the

FromTheMoon [43]

Answer:

1

Step-by-step explanation:

4÷1=4 4×1=4 4+1 = 5 5-1 = 4

4 0

3 years ago

Which expression can be used to find mU?<br> 19.5<br> 7.5<br> vo

Xelga [282]

Answer:

C

Step-by-step explanation:

I know because I know that how

8 0

3 years ago

Can someone please help me

sergij07 [2.7K]

Answer:

m∠TSP = 53°

Step-by-step explanation:

m∠RSU and m∠TSP are vertical angles

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3 years ago

PLEASE HELPPPP IM ALMOST DONE IM REALLY SLEEPY AND I HAVE TO DO THIS TEST BEFORE I GO TO BED

enyata [817]

Answer:

the tens place

Step-by-step explanation:

just need to know long division

7 0

3 years ago

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