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3 years ago

Which integer represents 50 degree below zero? A- 50 B- 0 C- -25 D- -50

Mathematics

2 answers:

scZoUnD [109]3 years ago

6 0

Answer:

D) -50

Step-by-step explanation:

The answer is D.

Numbers below zero would be negative. This eliminates B and A, as they are positive.

Numbers above zero are positive.

The answer is not C because that would be 25 degrees below zero, not 50 below.

That leaves us with D. D is -50, which is also stated as "50 below zero".

So, our best answer would be D.

Tamiku [17]3 years ago

3 0

Answer:

A 50

Step-by-step explanation:

B is 0 degrees

C is minus 20 degrees

D is -50 degrees

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4x + 5y = 3 2x + 3y = 1Solve by elimination

Lesechka [4]

Answer:

The solution to the system of equations is:

x = 2, and y = -1

Explanation:

Given the pair of equations:

4x + 5y = 3 ..........................................................................(1)

2x + 3y = 1............................................................................(2)

To solve this by elimination:

Multiply equation (2) by 2, to eliminate x

Equation (2) becomes

4x + 6y = 2 .........................................................................(3)

Subtract equation (1) from (3)

4x - 4x + 6y - 5y = 2 - 3

y = -1 ....................................................................................(4)

Multiply equation (1) by 3 and equation (2) by 5 to eliminate y

Equation (1) becomes

12x + 15y = 9 .......................................................................(5)

Equation (2) becomes

10x + 15y = 5 ........................................................................(6)

Subtract equation (6) from (5)

12x - 10x + 15y - 15y = 9 - 5

2x = 4

Divide both sides by 2

x = 4/2 = 2 ............................................................................(7)

From equations (7) and (4)

x = 2, and y = -1

7 0

1 year ago

What is the value of x? A) 3 B) 6 C) 8 D) 1

makvit [3.9K]

It is c because it is I just did if give me Brainly

4 0

3 years ago

Read 2 more answers

Give the equation for each of the following statements.

emmasim [6.3K]

Answer:

Step-by-step explanation:

1. Y varies jointly as R and T

Y = k*R*T

Y = kRT

Where,

k = constant of proportionality

2. B is directly proportional to the square of A and inversely proportional to the cube of C.

B = k(A²) / C³

B = kA²/C³

Where,

k = constant of proportionality

4 0

3 years ago

According to a survey of 100 people regarding their movie attendance in the last year, 40 had seen a science fiction movie, 55 h

erastovalidia [21]

Answer:

The probability that at least one movie had seen P(S∪(AD)∪H) = 0.75

Step-by-step explanation:

The total number of movie attendance in the last year n =100

Let 'S' be the event had seen science fiction movie

The probability of that the event had seen science fiction movie

P(S) = 40/100 = 0.4

Let 'AD' be the event had seen adventure movie

the probability of that the event had seen adventure movie

P(AD) =55/100 = 0.55

Let 'H' be the event had seen Horror movie

The probability of that the event had seen Horror movie

P(H) =20/100 = 0.2

given data 25 had seen a science fiction movie and an adventure movie

The probability of that the seen a science fiction movie and an adventure movie

that is P(S∩(AD)) = 25/100=0.25

Given 5 had seen an adventure movie and a horror movie

The probability of that the seen adventure movie and a horror movie

That is P((AD)∩ H) = 5/100=0.05

Given 5 had seen an science movie and a horror movie

The probability of that the seen science movie and a horror movie

That is P((S∩ H) = 15/100=0.15

Given only 5 people had seen a movie from all three categories.

The probability of that the seen a movie from all three categories.

That is P(S∩(AD)∩H) =5/100=0.05

The probability that at least one movie had seen P(S∪(AD)∪H) =

= P(S)+P(AD)+P(H) - P(S∩(AD)-P((AD)∩ H)-P((S∩ H) + P(S∩(AD)∩H)

= 0.4+0.55+0.2-0.25-0.05-0.15+0.05

= 0.75

3 0

4 years ago

∠A and \angle B∠B are vertical angles. If m\angle A=(3x-30)^{\circ}∠A=(3x−30)

Yuki888 [10]

Answer:

$x=21\textdegree$

Step-by-step explanation:

So we know that:

$\angle A=3x-30 \text{ and}\\\angle B=2x-9$

And that the two angles are vertical angles.

Since they are vertical angles, their measurements are equivalent. Thus, to find x, set the equations equal to each other:

$\angle A=\angle B\\(3x-30)=(2x-9)$

Now, solve for x. Add 30 to both sides. The left side cancels:

$(3x-30)+30=(2x-9)+30\\3x=2x+21$

Now, subtract 2x from both sides. The right cancels:

$(3x)-2x=(2x+21)-2x\\x=21$

Thus, the value of x is 21.

8 0

4 years ago