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3 years ago

One package of blackberries costs $3. How many packages of blackberries can you buy for $15?

Mathematics

1 answer:

Lostsunrise [7]3 years ago

5 0

Answer:

5 packages

Step-by-step explanation:

One package of blackberries cost $3

Let x represent the number of packages that will cost $15

1 = $3

x= $15

3x= 15

Divide both sides by the coefficient of x which is 3

3x= 15/3

x= 5

Hence 5 packages of blackberries will cost $15

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Area of square= 625 m sq Perimeter =??

sveticcg [70]

Answer:

Step-by-step explanation:

<u>Given</u> :

Area of square = 625 m²

<u>#1) Finding the side length</u>

Area = (side length)²
⇒ side length = √Area
⇒ side length = √625
⇒ side length = 25 m

<u>#2) Calculating perimeter</u>

Perimeter = Total length of the sides of the shape
Perimeter = 4 x side length [a square has 4 equal sides]
⇒ Perimeter = 4 x 25
⇒ Perimeter = <u>100 m</u>

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2 years ago

Read 2 more answers

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nydimaria [60]

Answer:

2+0.15x=3.20

Step-by-step explanation:

So you have the original or starting point $2 which b in y=Mx+b then it’s 0.15 per day but you don’t know how many days so you use x and she owed a total of 3.20

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2 years ago

Pllllllllllllzzzzzzzzzzzzz Heeeeeeeellllllllllppppppppppp!!!!

FrozenT [24]

Answer:

Option C. Independent Variable: time, Dependent Variable: net profit

Graph starts out rising and starts falling mid-year. At the beginning of 2006 it is at the minimum value and begins rising again before staying at a fairly constant rate for the remainder of the year

Step-by-step explanation:

In this problem

Let

x------> the time

y-----> the net profit

we know that

The independent variable is the time (variable x)

The dependent variable is the net profit (variable y)

see the attached figure to better understand the problem

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2 years ago

I needs help with it

Slav-nsk [51]

Answer:

a) initial height = 0 m

b) 8 s

c) vertex = (4, 32)

maximum height = 32 m

Step-by-step explanation:

<u>Given equation</u>:

$h=-2t^2+16t$

where:

h is the height of the arrow about the ground (in metres)
t is the time (in seconds)

The initial height of the arrow will be at the beginning of its journey, so when t = 0

Substitute t = 0 into the equation and solve for h:

$\implies h=-2(0)^2+16(0)$

$\implies h=0$

Therefore, the initial height of the arrow is 0 m.

The arrow will hit the ground when the height is 0 m.

Substitute h = 0 into the given equation:

$\implies -2t^2+16t=0$

Factor out -2t:

$\implies -2t(t-8)=0$

Therefore:

$\implies -2t=0 \implies t=0$

And:

$\implies t-8=0 \implies t=8$

Therefore, the arrow will hit the ground at 8 seconds.

The vertex is the <u>turning point</u> of a parabola - it's minimum or maximum point.

As the leading coefficient for the given equation is <u>negative</u>, the parabola <u>opens downwards</u> and so its <u>vertex</u> is its <u>maximum point</u>.

There are different ways to find the vertex of a parabola. The easiest way to find the x-coordinate is by calculating the midpoint of the x-intercepts.

We have determined that the arrow has a height of 0 m at 0 seconds and 8 seconds. Therefore, t = 0 and t = 8 are the x-intercepts. The midpoint is halfway between zero and 8, so the midpoint is t = 4

To find the y-coordinate, substitute t = 4 into the equation and solve for h:

$\implies h=-2(4)^2+16(4)$