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3 years ago

Find the value of x

Mathematics

1 answer:

forsale [732]3 years ago

3 0

Answer:

4) 4

5) 6.5

6) 14

Step-by-step explanation:

Question 4 equation: $(\frac{12*5}{2} * 2) + (\frac{5x}{2} *2) = 80$ ⇒ $60 + 5x = 80$ ⇒ $5x = 20$ ⇒ $x=4$ .

Question 5 equation: $16x=104$ ⇒ $x=6.5$ .

Question 6 equation: $\frac{10x}{2} = 70$ ⇒ $5x=70$ ⇒ $x=14$ .

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3 years ago

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A taxi charges a flat fee of $4.00 plus $3.25 per mile. How much will it cost to travel 8.3 miles? Round your answer to the near

NikAS [45]

Answer:

$30.98

Step-by-step explanation:

Make an expression

It costs 3.25 per mile(x), and there is a cost of 4 no matter how many miles are traveled.

3.25x+4

To find how much 8.3 miles will cost, substitute 8.3 in for x

3.25x+4

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So, it costs $30.98 to travel 8.3 miles

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4 years ago

I need a story problem to match the equation 36÷5=7 Remainder 1

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Answer:

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3 years ago

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Which sentence is correct?<br> A. -4 > 3<br> B. -4< -6<br> C. -4 > -7<br> D. -5 > -4

prisoha [69]

Answer:

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Step-by-step explanation:

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3 years ago

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A plane traveled 240 miles. The trip was with the wind. It took 3 hours. The trip back was into the wind. The trip back took 6 h

sveta [45]

Answer:

Plane speed is 60 miles/hour

Wind speed is 20 miles/hour

Step-by-step explanation:

Lets suppose the speed of the plane in still air is s and speed of the wind is w and since speed in the formula below equals speed of the plane plus the wind's speed so speed=s+w for this journey with the wind

$Speed=\frac{Distance}{Time}$

$Distance=Speed*Time$

For the first journey the trip with the wind:

$Distance=Speed*Time\\240=(s+w)(3)\\240/3=s+w\\s+w=80$

Here we got our first equation for the second equation we use the information from the second trip which was into the wind. Which means the speed here would be speed=s-w

$Distance=Speed*Time\\240=(s-w)*6\\240/6=s-w\\s-w=40$

so now we got our two equations adding both equations would result into the following:

$s+w=80\\s-w=40\\2s=120\\s=60$

so speed of the plane is 60 miles/hour put the value of s in any our two equations to calculate the wind speed, lets take the first equation:

$s+w=80\\60+w=80\\w=80-60\\w=20$

so the wind speed is 20 miles/hour

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3 years ago