What is the solution to this system of equations?

Answer:

x=-1/2 decimal form -0.5

Step-by-step explanation:

Multiply -2 and 1 then divide by 4,-2/4. x = −1 /2

Answer:

The value of each expression when x=3 will be -20 and -20.

Step-by-step explanation:

Given the expression

-4x-8

setting x=3

= -4(3)-8

=-12-8

=-20

Given the expression

-2(x+1)-2(x+3)

setting x=3

=-2(3+1)-2(3+3)

=-2(4)-2(6)

=-8-12

=-20

so we conclude that the value of both the expressions was -20 when we substituted the value x=3.

Therefore, the value of each expression when x=3 will be -20 and -20.

Answer:

B) 2x-y=5

Step-by-step explanation:

Info we have:

The x-intercept is 2.5

The slope is 2/1=2

Therefore, our equation so far is y=2x+b

We plug in our x-intercept in and make y=0 to get b:

0=2(2.5)+b

0=5+b

-5=b

Therefore, the equation of the line is y=2x-5

Given our found equation, we can see which option works.

A is wrong because 2x+y=-5 -> y=-5-2x -> y=-2x-5

B is right because 2x-y=5 -> -y=5-2x -> y=-5+2x -> y=2x-5

C is wrong because x+2y=-5 -> 2y=-5-x -> y=-2.5-1/2x -> y=-1/2x-2.5

D is wrong because 2y-x=10 -> 2y=10+x -> y=5+1/2x -> y=1/2x+5

Answer:

I think that it is proportional

Step-by-step explanation:

Answer (-2,-3)

Step-by-te exnation:

multiply the equation by number

Answer:

-3

Step-by-step explanation:

Answer:

w = -3

Step-by-step explanation:

-4w - 4 = 8 (add 4 on both sides)

-4w = 12 (divide by -4 on both sides)

w = -3

Hope this helps!!

Answer:

f ≥ 35

Step-by-step explanation:

Took the test on Aleks, it was right! :)

Answer:

6x > 3 < 4x

Step-by-step explanation:

..................

Answer:

36,465.1875

Step-by-step explanation:

The colony grows by 5% each hour, so you take the current total of bacteria, (100%) and add 5%. Every hour, you multiply the current total by 105%.

Hope this helps :)

Answer:

y = -3

Step-by-step explanation:

Add 2 to each side to isolate the -3y. Doing this leaves you with -3y=9. You then divide each side leaving you with y = -3

Answer:

The equation has one solution at which y = -3.

Step-by-step explanation:

To find the value of y, we need to isolate it from the rest of the equation.

[tex]\displaystyle{-3y-2=7}\\\\-3y = 9\\\\\bold{y = -3}[/tex]

We can check to make sure that y = -3 by substitution.

[tex]\displaystyle{-3(-3)-2 = 7}\\\\9-2=7\\\\7= 7 \ \checkmark[/tex]

Because we got a true statement, we can determine that y = -3.

Answer:

Step-by-step explanation:

Answer:

1/3 kg/m3

Step-by-step explanation:

density= mass/volume

mass=40 kg

volume=5m×8m×3m=120m³

density=40kg/120m³=1/3 kg/m³

Answer:

1/3 kg per cubic m or 0.33kg per cubic m

Step-by-step explanation:

density = mass

                volume

=     40kg          =     40kg

5m x 8m x 3m  =    120cubic metres

= 1/3 kg per cubic m or 0.33 kg per cubic m

9514 1404 393

Answer:

  7/3

Step-by-step explanation:

The point at the right end of segment 5 is 7 units above and 3 units to the right of the point at the left end. The slope is the "rise" divided by the "run":

  slope = m = rise/run = 7/3

The slope of segment 5 is 7/3.

Answer: - 8/5

Step-by-step explanation:

M1*M2=-1

Substuting M1 as 5/8

We get

5/8*M2=-1

M2=-8/5

Answer:

(8, 25) and (14, 50)

Step-by-step explanation:

Total cost of a set of cards = price per unit x number of cards

                                             = p x n

Thus, the total cost of printing each set of cards depends on the price per unit and number of cards. So that it can be represented in ordered pair as: (p, n).

For the first set of greeting cards,

the cost of printing a card = $8.0

number of cards printed = 25

This can be represented in ordered pair as (8, 25)

For the second set of greeting cards,

the cost of printing a card = $14.0

number of cards printed = 50

This can be represented in ordered pair as (14, 50)

Thus, the two ordered pairs that can represent the situations are (8, 25) and (14, 50).

Answer:

Step-by-step explanation:

y = a(x - h)² + k        - vertex form of  the equation of the parabola with vertex (h, k)  

So  the equation of the parabola with vertex (5, 7):

y = a(x - 5)² + 7

The parabola passes through point (2, -2) so if x=2 then y=-2

- 2 = a(2 - 5)² + 7

- 2 -7 = a(-3)² + 7 -7

- 9 = 9a

a = - 1

So, the equation written in vertex form of a parabola with a vertex of (5, 7) that passes through (2, -2):

                                        y = - 1(x - 5)² + 7

Answer:

f(t)=18,000(0.85)^t

Step-by-step explanation:

18,000 is the a value, and since it is depreciating 15% becomes -.15

so we are going to set it up like f(t)=18,000(1-0.15)^t

Final answer is f(t)=18,000(0.85)^t

The exponential function that gives the value of the car t years after its purchase is f(t) = $18,000(0.85^t).

The car would cost less with the passage of time. This is because it loses its value with the passage of time.

The formula that can be used to determine the value of the car is:

FV = P (1 - r)^n

f(t) = $18,000 x (1 - 0.15^t)

f(t) = $18,000(0.85^t)

To learn more about exponential function, please check: https://brainly.com/question/18760477

Answer:

C. 16

Step-by-step explanation:

If you have 44 in space and 2 cups already on there ( 4 in) you now only have, 36 in space left.

So, 16 multiplied by 2 1/4 or 2.25 in decimal is 44 in total.

Therefore you need approximately 16 more cups.

Brainliest pls?

Answer:

3 meters

Step-by-step explanation:

Distance covered in 1 second

[tex] = \frac{7.5}{2.5} \\ \\ = 3 \: m[/tex]

Answer:

The first integer is: -49

The second integer: -49+1 = -48

Solution Check:

-49+(-48) = -97

Step-by-step explanation:

Let the first integer: [tex]x[/tex]

As we are looking for a consecutive integer, so

The second integer would be: [tex]x+1[/tex]

We know the sum of these two integers is -97. Thus, we can write this equation and solve for 'x'.

[tex]x+\left(x+1\right)=-97[/tex]

[tex]x+x+1=-97[/tex]

[tex]2x+1=-97[/tex]

[tex]2x=-98[/tex]

Divide both sides by 2

[tex]\frac{2x}{2}=\frac{-98}{2}[/tex]

[tex]x=-49[/tex]

Therefore,

The first integer is: -49

The second integer: -49+1 = -48

Solution Check:

-49+(-48) = -97

Answer:

The answer is C. 2 pounds

Step-by-step explanation:

Add all the numbers up and then divide by the numbers of sets. The average is the same as the mean.

This is for the ones on Plato

Answer:

69.7

Step-by-step explanation:

[tex]x^{2} + 6^{2} = 70^{2}\\x^{2} + 36 = 4,900\\4,900 - 36 = 4,864\\\sqrt{4,864}\\69.7 = x[/tex]

Answer:

A= -1

Step-by-step explanation:

Answer:

Hmm this is a fun question,

its

STARTING

This turns into: Starting, Staring, String, Sting, Sing, Sin, In, I

All of which are words

Step-by-step explanation:

Though, I know this is a common answer.

I am unsure if there are others .

Answer:

The answer is C.

Step-by-step explanation:

Answer:

Step-by-step explanation:

x is positive and y is negative

Answer:

(x,-y)

Step-by-step explanation:

Answer:

1-4/5

Step-by-step explanation:

Answer:

20%

Step-by-step explanation:

4/5 = 80

80 is the price percentage.

5/5 - 4/5 = 1/5

1/5 = 20

so, 20%