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erastova [34]
3 years ago
5

How long will it take bernando to make the trip if he drives at 80 miles per hour?

Mathematics
1 answer:
brilliants [131]3 years ago
7 0
How long is the trip?
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Write these fractions in least common denominator2/5x+15y 1/2x+6y
Over [174]
Look at deonomators

assuming that the deonomenators are 5x+15y and 2x+6y

find their LCM
factor

5x+15y=5(x+3y)

2x+6y=2(x+3y)

LCM=10(x+3y)=10x+30y

multiply 2/(5x+15y) by 2/2=4/(10x+30y)
multiply 1/(2x+6y) by 5/5=5/(10x+30y)

if we add them
9/(10x+30y)
3 0
3 years ago
Tyler was shoving an equation and his last line of work read -12=12. What does this mean
wolverine [178]

Answer:

Step-by-step explanation:

-12 = 12 ....this is incorrect...meaning no solutions

**

if it ended in :

x = a number, or y = a number...means there is 1 solution

if it ended in :

-12 = 12....incorrect answer, means there is no solutions

if it ended in :

2 = 2 or -4 = -4....correct answer, but not variable...means infinite solutions

6 0
3 years ago
Read 2 more answers
If f(x)=ln(sin(2x)), f''(π/4) is equal to​
Licemer1 [7]

Use the chain rule to compute the second derivative:

f(x)=\ln(\sin(2x))

The first derivative is

f'(x)=(\ln(\sin(2x)))'=\dfrac{(\sin(2x))'}{\sin(2x)}=\dfrac{\cos(2x)(2x)'}{\sin(2x)}=\dfrac{2\cos(2x)}{\sin(2x)}

f'(x)=2\cot(2x)

Then the second derivative is

f''(x)=(2\cot(2x))'=-2\csc^2(2x)(2x)'

f''(x)=-4\csc^2(2x)

Then plug in π/4 for <em>x</em> :

f''\left(\dfrac\pi4\right)=-4\csc^2\left(\dfrac{2\pi}4\right)=-4

4 0
3 years ago
Find the length of the third side. If necessary, round to the nearest tenth.
viva [34]

Answer:

the question states if necessary, round the nearest tenth and by using the pythagoras theorem the answer should be 10 since its 9.21 and its nearest 10th is 10? im not quite sure though

5 0
2 years ago
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Your restaurant bill is $123.50. if you want to leave a 15% tip, how much will you spend?
EleoNora [17]

Answer:

$142.03

Step-by-step explanation:

123.50 x 0.15 = 18.53

123.50 + 18.53 = 142.03

4 0
3 years ago
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