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Mashcka [7]
4 years ago
14

Emily can buy daffodil bulbs in packages of 3 for $7.38 or in packages of 2 for $5.46. How much money does she save by buying 18

bulbs at the better price?
Mathematics
1 answer:
beks73 [17]4 years ago
4 0

she would save 1.14$ by buying 18 bulbs at the better price

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Find the slope of the line.
Rom4ik [11]

Answer:

-1/2 is the slope of the graph.

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A rocket is launched from a tower. The height of the rocket, why in feet is related to the time after launch, X and seconds, by
Maru [420]

Given:

Consider the height of the rocket, in feet after x seconds of launch is

y=-16x^2+152x+74

To find:

The time at which the rocket will reach its max, to the nearest 100th of a second.

Solution:

We have,

y=-16x^2+152x+74

It is a quadratic polynomial with negative leading coefficient. So, it is a downward parabola.

Vertex of a downward parabola is the point of maxima.

To find the time at which the rocket will reach its max, we need to find the x-coordinate of the vertex.

If a quadratic function is f(x)=ax^2+bx+c, then the vertex is

Vertex=\left(-\dfrac{b}{2a},f\left(-\dfrac{b}{2a}\right)\right)

Here, a=-16,b=152,c=74.

So,

-\dfrac{b}{2a}=-\dfrac{152}{2(-16)}

-\dfrac{b}{2a}=-\dfrac{152}{-32}

-\dfrac{b}{2a}=4.75

So, x-coordinate of the vertex is 4.75.

Therefore, the rocket will reach its max at 4.75 second.

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3 years ago
in a new clothing store, she charges 21.75 for each sweatshirt she sells. what was the revenue if she sold 51 sweatshirts last m
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Answer:


Step-by-step explanation:


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I have been struggling in math lately who dose iready
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Answer:

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Step-by-step explanation:

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Give the rate in miles per hour. Round to the nearest tenth.<br> Rachel jogs 20 feet in 3 seconds.
Tanya [424]

Answer:

Rate of jogging is 4.6 miles per hour.

Step-by-step explanation:

Rachel jogs 20 feet in 3 seconds and we have to find the rate of jogging in miles per hour.

Since 1 feet = 0.000189394 miles

Therefore, 20 feet = 0.0037879 miles

Similarly, 1 second = \frac{1}{3600} hour

Therefor, 3 seconds = \frac{3}{3600}

                                  = \frac{1}{1200} hours

Formula to calculate the rate = \frac{\text{Total distance of jogging}}{\text{Time taken to cover the distance}}

                                                = \frac{0.0037879}{\frac{1}{1200} }                                                        

                                                = 1200 × 0.0037879

                                                = 4.545

                                                ≈ 4.6 miles per hour

Therefore, rate of jogging is 4.6 miles per hour.

6 0
3 years ago
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