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3 years ago

Three months ago David could walk 2 miles in 40 minutes. Today he can walk 2 miles in 25 minutes what is the percent of change

Mathematics

1 answer:

aliya0001 [1]3 years ago

3 0

There is a 60% change or 63%

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Find the set of values of k for which the equation 3x² - 12x + k >. 0 has no real roots.

anzhelika [568]

Answer:

k > 12

Step-by-step explanation:

If a quadratic equation has no real roots the values of b^2 - 4ac

( for the general form ax^2 + bx + c = 0) is negative,

So we have the inequality:

(-12)^2 - 4*3* k < 0

144 - 12k < 0

12k > 144

k > 12

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2 years ago

A fruit bowl has 5 apples 7 oranges and 4 bananas. What is the ratio of apples to bananas?

Korolek [52]

Answer:

5 apples to 4 bananas

Step-by-step explanation:

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3 years ago

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Pic attached for further detail

marissa [1.9K]

I dont get what you asking

8 0

3 years ago

A line in the xy-plane that passes through the coordinate points (3, -6) and (–7, –4) will never intersecta line that is represe

anyanavicka [17]

Answer:

option A

Step-by-step explanation:

given coordinate (3, -6) and (–7, –4)

to find the equation of line

slope of the line passing through both the point will be

$m = \dfrac{y_2-y_1}{x_2-x_1}$

$m = \dfrac{-4+6}{-7-3}$

$m = -\dfrac{2}{10}$

equation of line

( y - y₁ ) = m ( x - x₁ )

$y + 6= -\dfrac{2}{10}(x - 3)$

x + 5 y = -27

line which will not intersect will be parallel to it so option A has same slope as our line equation i.e. -1/5

hence, correct answer is option A

3 0

3 years ago

Which of the following is not equal to cos⁡(520°)?

Gnoma [55]

The cosine repeats itself every 360 degrees, and it mirrors at 0 and 180 degrees. It inverts around 90 and 270.
So without using a calculator, you can tell that:

cos(520)=cos(520-360)=cos(160)
cos(160) = cos(180-20) = cos(180+20) = cos(200)
cos(160) is NOT equal to cos(20), it would be -cos(20).
cos(160) = -cos(20) = -cos(-20)

So C is the only one unequal.

8 0

3 years ago

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