All categories

3 years ago

What is the value of the following expression?

Mathematics

1 answer:

monitta3 years ago

6 0

The expression (−81)(−9) will give the value of 729.

Step-by-step explanation:

The given expression is (−81)(−9) .

The both numbers in the expression are negative numbers and they are given inside the brackets.

This means that, the negative numbers must be multiplied to get a final value.

The rules in multiplication are :

Positive number × Positive number = positive number
Negative number × Positive number = negative number
Positive number × Negative number = negative number
Negative number × Negative number = positive number

From the rules, it can be determined that the result of any two negative numbers will be a positive number.

So, eliminate option A) and B) because they have negative sign.

The expression (−81)(−9) = -81 × -9

⇒ 729.

Therefore, the option C) and D) are not in match with 729. None of the options are not the value of the given expression (−81)(−9).

You might be interested in

What is the equation of the line that had a slope of 4 and a y-intercept of -7?

nikklg [1K]

The correct answer would be D.Y=4X-7

6 0

2 years ago

****WILL GIVE BRAINLIEST TO FIRST ANSWERER****

xz_007 [3.2K]

Let's plug in each coordinate and see what we get:

(2, 0, 0)
-> 2A + 0 + 0 = D
-> 2A = D
-> A = D/2

(0, 6, 0)
-> 0 + 6B + 0 = D
-> 6B = D
-> B = D/6

(0, 0, 5)
-> 0 + 0 + 5C = D
-> 5C = D
-> C = D/5

plugging this back into the equation:
(D/2)x + (D/6)y + (D/5)z = D [then divide through by D]
(1/2)x + (1/6)y + (1/5)z = 1
and since we have to have integer coefficients,
multiply through by 30

so we get
15x + 5y + 6z = 30

Second question

Take a look at the bottom-left point in the picture.
If you move three points in the y-direction, you'll reach to the point A.
If you instead move up 4 points (or in the z-direction), you reach D.
And finally, if you walk back to point F from point E, you'll have moved back 4 points in the x direction. 

This gives us our measurements, or dimensions: 3 x 4 x 4.
If this were a rectangular prism, the dimensions would just be each of them multiplied.
But since it's triangular, you need to divide it by two. That gives you a total volume of
(3x4x4)/2 = 24.

5 0

3 years ago

(Ch. 6, p. A man bought a trampoline for his children to use. The trampoline has a diameter of 17 feet. If the man wishes to put

iVinArrow [24]

Diameter D of the trampoline = 17 feet

The circumference C, of the trampoline is calculated by the formula:

$C=\pi D$

Put D = 17 feet, π=3.14

$\begin{gathered} C=3.14\times17\text{feet} \\ C=53.38\text{feet} \end{gathered}$

The cirucmference o

8 0

9 months ago

Evaluate -5x-6y when x=-4 y=4

Georgia [21]

Answer:

-4

Step-by-step explanation:

8 0

2 years ago

I literally need help.

Paha777 [63]

Answer:

$4P+2G=96\\3P+1G=60 or 3P+G=60$

Step-by-step explanation:

Given in the question:

a) A family paid $96 for 4 pool passes and 2 gym memberships.

b) Later that day, an individual bought pool passes for herself and 2 of her friends , and 1 gym membership for her . She paid $60.

Let's write the system of equation for each purchase that happened in the scenario.

Let,

P= Price of each pool passes

G= Price of each gym membership

We get,

a) A family paid $96 for 4 pool passes and 2 gym memberships:

$4P+2G=96$

b) Later that day, an individual bought pool passes for herself and 2 of her friends , and 1 gym membership for her . She paid $60:

$3P+1G=60$

Therefore, the equations generated in the scenario were:

$4P+2G=96\\3P+1G=60 or 3P+G=60$

Where,

P=Price of each pool passes

G=Price of each gym membership

PLEASE MARK ME AS BRAINLIEST

5 0

2 years ago