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3 years ago

I need the answer been breaking my back all day

Mathematics

2 answers:

malfutka [58]3 years ago

8 0

The dot here means multiplication and so the answer is 10.35

natima [27]3 years ago

4 0

The answer is 6.21 hope I helped

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7= -5x

exis [7]

Option 2 multiple each side by -5

4 0

3 years ago

Read 2 more answers

2) At a local grocery store, three bags of peanuts and four bags of almonds cost $27 45.

Scilla [17]

Answer:

$7.60

Step-by-step explanation:

Use a linear function (again)

let x = peanuts

let y = almonds

3x+4y=27.45

5x+2y=24.05

Multiple 2nd equation by 2

3x+4y=27.45

10x+4y= 48.1

7x=20.65

x=2.95

Plug in x into either equation

10x+4y= 48.1

29.5+4y=48.1

4y=18.6

y=4.65

4.65+2.95=7.60

5 0

3 years ago

A fence borders a rectangular piece of land.The land has an area of 13,250 square feet and a width of 50 feet .

Alex787 [66]

13 250+
50
________
13 300

4 0

4 years ago

Which is the graph of the linear function that is represented by the equation Y = 5 X-22

Ronch [10]

110

Step-by-step explanation:

7 0

3 years ago

You are designing a rectangular garden. the garden will be enclosed by fencing on three sides and by a house on the fourth side.

RUDIKE [14]

Suppose the dimensions of the rectangle is x by y and let the side enclosed by a house be one of the sides measuring x, then the sides that is to be enclosed are two sides measuring y and one side measuring x.

Thus, the length of fencing needed is given by

P = x + 2y

The area of the rectangle is given by xy,

i.e.

$xy = 288 \\ \\ \\ \\ \Rightarrow y= \frac{288}{x}$

Substituting for y into the equation for the length of fencing needed, we have

$P=x+2\left( \frac{288}{x} \right)=x+ \frac{576}{x}$

For the amount of fencing to be minimum, then

$\frac{dP}{dx} =0 \\ \\ \Rightarrow1- \frac{576}{x^2} =0 \\ \\ \Rightarrow \frac{576}{x^2} =1 \\ \\ \Rightarrow x^2=576 \\ \\ \Rightarrow x=\sqrt{576}=24$

Now, recall that

$y= \frac{288}{x} = \frac{288}{24} =12$

Thus, the length of fencing needed is given by

P = x + 2y = 24 + 2(12) = 24 + 24 = 48.

Therefore, 48 feets of fencing is needed to enclose the garden.

8 0

3 years ago