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3 years ago

120 pupils went on a feildtrip . 55% of the pupils were girls and the rest were boys. How many boys went on the trip?

Mathematics

2 answers:

wlad13 [49]3 years ago

4 0

Answer:

54 boys went in the trip

Step-by-step explanation:

55% of 120 is 66 and 66 minus 120 is 55

weeeeeb [17]3 years ago

3 0

Answer:

number of boys are 54. ...

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Find an equation of the tangent line to the curve at the given point. y = x3 âˆ’ 3x + 2, (3, 20)

lisov135 [29]

Answer:

$y - 20 = 24(x - 3)$

Step-by-step explanation:

Equation of a line:

The equation of a line, in point-slope form, has the following format:

$y - y_0 = m(x - x_0)$

In which the point is $(x_0,y_0)$ and the slope is m.

(3, 20)

This means that $x_0 = 3, y_0 = 20$ . So

$y - y_0 = m(x - x_0)$

$y - 20 = m(x - 3)$

Slope:

The slope is the derivative of the function at the point:

The function is:

$y = x^3 - 3x + 2$

The derivative is:

$y^{\prime}(x) = 3x^2 - 3$

At the point, we have that $x = 3$ . So

$m = y^{\prime}(3) = 3*3^2 - 3 = 27 - 3 = 24$

So the equation to the tangent line to the curve a the point is:

$y - 20 = 24(x - 3)$

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Step-by-step explanation:

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Read 2 more answers

If ab= 53 and ac= 81, find bc

Snowcat [4.5K]

If you know the total length, and the length of one part, and you're trying to find the other part, just subtract.

81-53=28

bc=28

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