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Paul [167]
2 years ago
11

Is -cos(x) the same as cos(-x)?

Mathematics
1 answer:
miss Akunina [59]2 years ago
6 0

Answer:

Not the same

Because if it derives, it will be positive and the other negative

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Lisa drew a picture of a boat. She used the scale factor 1 inch : 6 feet
kotykmax [81]

Answer:

42 feet

Step-by-step explanation:

if each inch equals 6 feet, and if her drawing is 7 inches long, then 7×6 would equal the auctual length of the boat, which is 42 feet.

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3 years ago
Jessica is hiring a plumber to remodel her bathroom. She knows that this job will take many hours to complete, so she wants to f
Eddi Din [679]

Answer:

It doesn't make sense ....

Step-by-step explanation:

180 divided by 2=90

400 divided by 7=57

220 divided by 4=55

280 divided by 3.5=80

370 divided by 5.5 =67

None of it is under 50  per hour....sorry

6 0
3 years ago
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This rectangular prism is intersected by a plane that contains points N, P, U, and R.
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The answer is 44.3 ft.

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3 years ago
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1.) You are one of five people who have been hired to mow the lawn at the local college. Each week, the dimensions of the plot y
iren [92.7K]

Answer:

1a)  Length = 7x + 3  & Width = 4x - 2

1b)  Area = 28x^2 -2x -6

1c)  Area = 2774 sq. m

2.  (x-4)(y+7)

Step-by-step explanation:

1a)

The length given as words is "3 more than 7 times x"

The width given as words is "4 times x minus 2"

The expression for length would be  7x + 3

The expression for width would be 4x - 2

1b)

The area is length * width

Since we already know the algebraic expressions for length and width from part (a) above, we use the formula:

Area = (7x+3)(4x-2) = 28x^2 -14x + 12x - 6 = 28x^2 -2x -6

Area = 28x^2 -2x -6

1c)

Given x = 10, we put this into the area expression we found in (b) above.Let's see:

28x^2 -2x -6\\=28(10)^2 -2(10) -6\\=2774

Area = 2774 sq. m

2.

We can group the first two terms and next two terms and write up:

xy-4y+7x-28\\(xy-4y)+(7x-28)\\y(x-4)+7(x-4)\\(x-4)(y+7)

That's the factored form.

8 0
3 years ago
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I'm confused on my math homework
Taya2010 [7]
What is the home work

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3 years ago
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