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3 years ago

How to solve -2+x=19

Mathematics

2 answers:

Andrei [34K]3 years ago

8 0

The answer for the equation is 21

Andrews [41]3 years ago

4 0

21 I believe if you plus a negative it’s basically subtracting so 21+-2 =19

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URGENT WILL MARK BRAINLIEST! 50 POINTS! Find the value of x so that f(x) = 3.

Bumek [7]

Answer:

x = 2

Step-by-step explanation:

1. f(x) basically means y. So f(x) = 3 translates to y=3.

2. At y=3, you can see it meets at x=2.

3 0

2 years ago

Which of the following equations have complex roots?

mestny [16]

Answer:

Step-by-step explanation:

Complex roots of quadratic functions occur when the discriminant is negative.

Discriminant

$b^2-4ac\quad\textsf{when}\:\:ax^2+bx+c=0$

Evaluate the discriminant of each of the given equations.

$\textsf{A.} \quad 3x^2+2=0$

$\implies a=3, \quad b=0, \quad c=2$

$\implies b^2-4ac=0^2-4(3)(2)=-24$

As -24 < 0 the equation will have complex roots.

$\textsf{B.} \quad 2x^2+1=7x$

$\implies 2x^2-7x+1=0$

$\implies a=2, \quad b=-7, \quad c=1$

$\implies b^2-4ac= (-7)^2-4(2)(1)=41$

As 41 > 0 the equation does not have complex roots.

$\textsf{C.} \quad 3x^2-1=6x$

$\implies 3x^2-6x-1=0$

$\implies a=3, \quad b=-6, \quad c=-1$

$\implies b^2-4ac=(-6)^2-4(3)(-1)=48$

As 48 > 0 the equation does not have complex roots.

$\textsf{D.} \quad 2x^2-1=5x$

$\implies 2x^2-5x-1=0$

$\implies a=2, \quad b=-5, \quad c=-1$

$\implies b^2-4ac=(-5)^2-4(2)(-1)=33$

As 33 > 0 the equation does not have complex roots.

Learn more about discriminants here:

brainly.com/question/27444516

brainly.com/question/27869538

Learn more about complex roots here:

brainly.com/question/26344541

6 0

2 years ago

Solve for this please show work tysm

dalvyx [7]

Answer:

P1= -2/3

P2= -10/3

Step-by-step explanation:

take the sq rt of both sides and use both + and - roots

3P+6=4

3P+6=-4

subtract 6 from both sides for each one

3P=-2

P=-2/3

3P=-10

P= -10/3

8 0

2 years ago

P(A) = .6, P(B) = .3, P(Β | A) = .5

Reika [66]

Answer:

Step-by-step explanation:

$P(B|A)=\frac{A ~and~B}{P(A)} \\0.5=\frac{P(A and B)}{0.6} \\P(A~and~B)=0.5 \times 0.6=0.30$

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2 years ago

Part A Divide. 6,499 - 7 =

Ksenya-84 [330]

Answer:0

Step-by-step explanation:

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2 years ago