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3 years ago

Find the y intercept of the line y+2x-1=0

Mathematics

1 answer:

Anni [7]3 years ago

5 0

Answer:

Y intercept= 1

Step-by-step explanation:

First you need to put this in slope intercept form (y=mx+b) so heres the steps:

y+2x-1=0 (given)

y-1=-2x (subtract 2x from both sides)

y=-2x+1 (add 1 to both sides)

y=-2x+1 is the y=mx+b form

The y intercept is b so your answer is 1

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3. What are the roots of the polynomial y = x³ - 8?

zzz [600]

Step-by-step explanation:

x^3 is a perfect cube, 8 is a perfect cube, so we use difference of cubes.

${a}^{3} - {b}^{3} = (a - b)( {a}^{2} + ab + {b}^{2} )$

Cube root of x^3 is x.

Cube root of 8 is 2

a=x

b= 2.

$(x - 2)( {x}^{2} - 2x + 4)$

Set these equations equal to zero

$x - 2 = 0$

$x = 2$

${x}^{2} - 2x + 4 = 0$

If we do the discriminant, we get a negative answer so we would have two imaginary solutions,

Thus the only real root is 2.

If you want imaginary solutions, apply the quadratic formula.

$1 + i \sqrt{ 3 }$

and

$1 - i \sqrt{3}$

4 0

1 year ago

A new movie opened in a local theater. On opening day, 985 people saw the movie. Each day after opening day, the number of peopl

zysi [14]

Answer:

About 3891 people saw that movie.

Step-by-step explanation:

Day 1: 985 people

Day 2: (985*8)/10 (20% gone) = 788

Day 3: (788*8)/10 (20% gone) = 630.4

Day 4: (630.4*8)/10 (20% gone) = 504.32

Day 5: (504.32*8)/10 (20% gone) = 403.456

Day 6: (403.456*8)/10 (20% gone) = 322.7648

Day 7: (322.7648*8)/10 (20% gone) = 258.21184

Adding this up:

985+788+630.4+504.32+403.456+322.7648+258.21184=

985+788+630+504+403+323+258=3891

4 0

3 years ago

Mr Tarun earns dollar $12.50 a day how much would he earn if he works for 6 days

WARRIOR [948]

Answer:

$75

Step-by-step explanation:

Question:Mr Tarun earns dollar $12.50 a day how much would he earn if he works for 6 days?

Solution:$12.50 in a day

12.50 multiple by 6

=75

Ans.$75

HOPE IT HELPS

CARY ON LEARNING

8 0

2 years ago

Read 2 more answers

Is the graph increasing, decreasing, or constant where -3 < X <-1?

Romashka [77]

Answer:

decreasing

Step-by-step explanation:

since its negative it will slope down

8 0

3 years ago

ANSWER ASAP!!!

mr_godi [17]

Answer:

Step-by-step explanation:

got it right on edjenuity

6 0

2 years ago