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Artyom0805 [142]

2 years ago

14

Determine whether the equation below has a one solutions, no solutions, or an infinite number of solutions. Afterwards, determin

e two values of
x
x that support your conclusion.

−5x=35

1 answer:

timurjin [86]2 years ago

3 0

-5x=35
x=35/-5
x=-7

Therefore the equation has only one solution

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Find a quadratic model for the set of values: (-2, -20), (0, -4), (4, -20). Show your work.

Ivahew [28]

Ok... so this question can be solved by using simultaneous equations.

Use the general from of a parabola

$y = ax^2 + bx + c$

you know the value of c, the y-intercept... y = -4

which means the equation is

$y = ax^2 + bx - 4$

now use the other 2 points to get 2 equations in 2 unknowns

(-2, -20) just substitute

$-20 = (-2)^2a + (-2)b - 4 ~~~or~~~ -20 = 4a - 2b - 4$

this becomes

$4a - 2b = -16$

now the other equation using (4, -20)

The simplified form is

6 0

3 years ago

Solve the system by elimination 4x-y=2 and x+3y=7

alexdok [17]

Answer:

x=1 y=2

Step-by-step explanation:

Isolate x for 4x -y=2: X=2+y/4

Substitute x= 2+y/4

(2+y/4 )+3y=7

simplify 2+13y/4=7

Isolate y for 2+13y/4=7

y=2

Forx= 2+y/4

Substitute y = 2

x= 2+2/4

Simplify

X=1

3 0

2 years ago

Definition of the identity property of addition and the commutative property of addition

Novay_Z [31]

Let x, y be numbers.
The addition identity property states that 0 + x = x.
The commutative property states that x + y = y + x

6 0

4 years ago

Read 2 more answers

Um feirante usava uma balança de dois pratos com pesos de 2 kg, 1 kg, 500 g, 200 g

andrew-mc [135]

Answer:

hola si mui bein

Step-by-step explanation:

3 0

3 years ago

Describe and correct the error in finding the area of a sector with a radius of 6 centimeters and a central angle of 40

Jet001 [13]

Answer:

12.56

Step-by-step explanation:

Remark

Since we don't have anything other than the question, all I can do is answer the question. You are left with the task of figuring out the error.

Formula

Area = (central angle divided by 360 ) * pi r^2

Solution

Area = (40 /360) * 3.14 * 6^2

Area = 1/9 * 3.14 * 36

Area = 4 * 3.14

Area = 12.56

8 0

3 years ago