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morpeh [17]
3 years ago
6

Question 3 (Multiple Choice Worth 6 points)

Mathematics
1 answer:
Alik [6]3 years ago
4 0

Answer:

negative 9 plus or minus the square root of 17 divided by 8

Step-by-step explanation:

move all terms to one side

4x^2 + 9x + 4= 0

Use the quadratic formula

and you get  negative 9 plus or minus the square root of 17 divided by 8

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Two cyclists start at the same point and travel in opposite directions. One cyclist travels 4 km per hour faster than the other.
yaroslaw [1]

Answer:

the rate of the first cyclist: 28km/h

the rate of the 2nd cyclist 28+4= 32km/h

Step-by-step explanation:

x= the rate of the first cyclist

x+4= the rate of the 2nd cyclist

after 4 hours: + the first cyclist travels 4x  (km)

                       + the 2nd cyclist travels 4(x+4)  (km)

because the two cyclists are 240 km apart after 4 hours

=> 4x + 4(x+4) = 240 => x= 28

i hope it's useful forr u =)))

5 0
2 years ago
If the points at (-4, 3) and (2, 3) are reflected over the x-axis to create two new points, what shape can be formed by the four
Svetllana [295]

Answer:

Step-by-step explanation:

Let (a,b)\in \mathbb{R}^{2}, a reflection over the x-axis consists in the following operation:

(a,b) \rightarrow (a,-b)

If we know that X = (-4,3) and Y = (2, 3), then the points translated over the x-axis are X' = (-4, -3) and Y' = (2,-3), respectively. The most precise description of the shape is a rectangle for the following facts:

1) XX' = YY' = 8 and XY = X'Y' = 6.

2) X and X' have the same x-component.

3) Y and Y' have the same x-component.

4) X and Y have the same y-component.

5) X' and Y' have the same y-component.

A representation of the shape is included below as attachment.

3 0
2 years ago
What 2 numbers multiply to -25 and add to -24​
S_A_V [24]

Answer: 1 and -25

Step-by-step explanation:

1 x -25 = -25

1 + -25 = -24

7 0
2 years ago
Read 2 more answers
A boat goes from 84 km/h to 42 km/h in 7 seconds. What is the deceleration?
iogann1982 [59]

Answer:41

Step-by-step explanation:

84-42=41

5 0
3 years ago
-2n divided by 3 + (4n - n), when n = 6
Sveta_85 [38]

Step-by-step explanation:

Divisor = -2n = -2 * 6 = - 12

Dividend = 3 + ( 4 * 6 - 6) = 3 + 18 = 21

Now

21 / -12

dividing numerator and denominator by 3

= - 7 / 4

4 0
2 years ago
Read 2 more answers
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