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Nimfa-mama [501]
3 years ago
13

Which choice is equivalent to the expression below? -81

Mathematics
1 answer:
mixas84 [53]3 years ago
7 0

Answer:

Well, The expression -81 is equal to -81.

Step-by-step explanation:

-81=-81

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How would you also do this??
Vesna [10]

4(5x + 7) = 128

First, I'd do distributive property and get:

20x + 28 = 128

Then, subtract 28 from each side.

20x = 100

Next, I'd divide 100 by 20 = 5

x = 5

4 *(5(5) + 7) = 128

5 * 5 = 25

4 * (25 + 7)

4 * 32 = 128

Therefore, the perimeter = 2l + 2w

l = 4

w = 5x + 7

BUT we know that x = 5

w = 5(5) + 7 = 32

2(4) + 2(32)

8 + 64 = 72

Therefore, the perimeter would be 72 inches.

5 0
3 years ago
If f(x) = 8, what is f(x) when x = 10?
poizon [28]
F(x) = 8.

This is a constant function. No matter the value of x, f(x) will always be = 8

Therefore when x = 10,   f(x) = 8.
4 0
3 years ago
Read 2 more answers
Amanda is building a soft triangular kennel for her dog. She has four wooden planks of lengths 2 feet, 3 feet, 5 feet, and 6 fee
viva [34]

Answer:

3 ft, 5ft, 6ft

Step-by-step explanation:

To build a kennel of my dog, I would try to make it the largest possible with what I have.

So, I would go with the 3 longest planks: 3ft, 5ft and 6ft.

By looking at the length, I see I could make something very close to a right triangle since I could use the 6ft as an hypotenuse, and have the two other sides as 3ft and 5 ft  (6² is almost 3²+5², which equal 34).

That means my corner angle would be slightly over 90 degrees.

4 0
3 years ago
What is the horizontal asymptote of f(x) = (2x+1)/ (x^2-4x+3) +2
evablogger [386]

Answer:

x=3 and x=1

Step-by-step explanation:Horizontal asymptote will occur at x=3 and x=1.

You have to factorize the denominator and find the zeroes of the denominator.  That is how you find out the horizontal asymoptote.

6 0
3 years ago
Need some help with the question in the image​
goldfiish [28.3K]

Step-by-step explanation:

cost of 1 kg of jam = x

cost of 1 kg of butter = y

3x + 2y = 29 .....1

6x + 3y = 54 .....2

.....1 × 2 both sides of equation

6x + 4y = 58 .....3

.....3 - ......2

y = 4

replace y = 4 in 1......

3x + 8 = 29

x = 7

6 0
2 years ago
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