Can someone explain this?

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

8 0

Whenever you go to check your answer since x can only be greater than -7 you have to use a number bigger than -7 to make sure the solution is correct.

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Jermaine wants to know how fast he is traveling in a school bus, but he cannot see the speedometer. He records that the bus trav

Advocard [28]

<h3>Answer:</h3>

48 mph

<h3>Explanation:</h3>

The rate in miles per second can be converted to the rate in miles per hour by multiplying by the number of seconds in an hour:

$\dfrac{1\,mi}{75\,s}\cdot\dfrac{3600\,s}{1\,h}=\dfrac{3600\,mi}{75\,h}=48\,mi/h$

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4 years ago

Find the perimeter of this shape<br>

Margaret [11]

The answer is 257.08m. Explanation: you know that one side of the square in the middle is 50m. This is the same as the diameter of one of the half circles on each side. The perimeter of a circle is the formula C=2(pi)r, where r is the radius. Dividing 50 by two will get you the size of the radius, then just plug it into the equation to find the perimeter of both rounded sides (a full circle). The two circular sides equal 157.08m, so then you just need to add the flat sides, which are both 50m since they’re congruent. 157.08m + 50m + 50m = 257.08m, so the perimeter of the shape is 257.08m.

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4 years ago

How is the graph of Y=√X) -5 translated from the graph of √X ?

Tom [10]

Shifted 5 units to the left.

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3 years ago

What is the most likely meaning of the word endangered?

schepotkina [342]

Answer:

exposed is another word for endangered

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3 years ago

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The parabolic arch of a bridge over a one-way road can be described by the equation y = -x^2 + 6, where x and y ar emeasured in

Vladimir [108]

So check the picture below

if we check the solutions or zeros for the equation, we get $\bf y=-x^2+6\implies 0=-x^2+6\implies x=\pm \sqrt{6}$

and as you can see in the picture, the value of "x" when y = 3.5, or the height of the truck is $\bf y=-x^2+6\implies 3.5=-x^2+6\implies x=\pm \sqrt{2.5}$

the truck, ends up with a clearance of $\bf \sqrt{2.5}-1.5$ on either side, so, the maximum clearance, the truck can have, those two clearances added together, $\bf 2(\sqrt{2.5}-1.5)$

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3 years ago