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2 years ago

B^2 – 4ac if a = 2, b = 9, and c = 4

Mathematics

1 answer:

babymother [125]2 years ago

4 0

Answer:

Step-by-step explanation:

$(b)^{2} - 4(a)(c) \\(9)^{2} - 4(2)(4) \\81 - 4(2)(4) \\81 - 32 \\49$

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What is the value of n in the equation 1/2(n-4)-3=3-(2n+3) ?

bulgar [2K]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Flying against the wind, an airplane travels 4560 kilometers in 6 hours. Flying with the wind, the same plane travels 3720 kilom

Flura [38]

Answer:

The speed rate of the plane in still air is 1006.67 km/h

The speed rate of the wind is 246.67 km/h

Step-by-step explanation:

To answer the question, we let the speed of the plane in still air = x km/h

Let the speed of the wind = y km/h

Therefore,

4560/(x - y) = 6 hours and

3720/(x + y) = 3 hours

4560 = 6·x - 6·y.........(1)

3720 = 3·x + 3·y ........(2)

Multiplying equation (2) by 2 and add to (1) gives

12080 = 12·x

x = 12080/12 = $1006\frac{2}{3}$ km/h

Substituting the value of x in (1) gives

4560 = 6040 - 6·y

6·y = 1480

y = 1480/6 = $246\frac{2}{3}$

The speed rate of the plane in still air = 1006.67 km/h

The speed rate of the wind = 246.67 km/h.

7 0

4 years ago

What is less than 1/2 but greater than 2/8 what could I be

leva [86]

Ok, so first let's convert 1/2 to eights. Now we need to find something greater than 2/8, but less than 4/8. So you can draw a number line, or do it mentally. So at the end you should get 3/8, which is LESS than 4/8 but GREATER than 2/8.

6 0

3 years ago

Explain in your own words using appropriate vocabulary on how you determine what side is opposite, adjacent and the hypotenuse.

cupoosta [38]

Answer:

You can determine the hypotenuse easily, since it's the longest side of the triangle. To find the hypotenuse you use the Pythagorus Theoreom. To determine an adjacent angle, just find the opposite of the given angle. The hypotenuse of a right triangle is always the side opposite the right angle.

Hope this helps :) - genius423

5 0

3 years ago

Roisin is a price analyst for a food distributor. One week she put together bids for 680 cases, 507 cases, 830 cases, 391 cases,

sineoko [7]

Answer: The average number of cases per bid is 599.

Step-by-step explanation:

Given: One week she put together bids for 680 cases, 507 cases, 830 cases, 391 cases, and 587 cases.

Total cases = 680 + 507 + 830 + 391+587

= 2995

Number of bids = 5

Now, average number of cases per bid = $\dfrac{\text{Total cases }}{\text{Number of bids}}$

$=\dfrac{2995}{5}\\\\=599$

Hence, the average number of cases per bid is 599.

6 0

3 years ago