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scoundrel [369]
2 years ago
14

Find the equation of the line that contains the given point and is perpendicular to the given line. Write the equation in slope-

intercept form, if possible, (-7,-1);y=-7x+9

Mathematics
1 answer:
Colt1911 [192]2 years ago
4 0

Answer:

what is the value of X by the way

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Please help me solve this for 15 points! <br><br>-x2 + 4x - 54 = 0​
Mazyrski [523]

Answer:

x1 =2-5i*sqrt(2)

x2 =2+5i*sqrt(2)

Step-by-step explanation:

-x^2 +4x-54=0 (quadratic equation)

a=-1, b=4, c=-54

x1=(-b+sqrt(b^2-4ac))/2a

x1=(-4+sqrt(4^2 - 4*(-1)(-54))/2*(-1)

x1=(-4+sqrt(16-216))/(-2)

x1 =(-4+sqrt(-200))/(-2)

x1 =(-4+sqrt(200i^2))/(-2) i^2=-1

x1 =(-4+sqrt(100*2*i^2))/(-2)

x1 =(-4+10i*sqrt(2))/(-2)

x1 =2-5i*sqrt(2)

x2 =(-b-sqrt(b^2-4ac))/2a

x2 =(-4-10i*sqrt(2))/(-2)

x2 =2+5i*sqrt(2)

7 0
3 years ago
Read 2 more answers
Find the angle between the given vectors to the nearest tenth of a degree. u = (8, 4), v = (9, -9)
Usimov [2.4K]

Answer:

<em>71.6 degrees </em>

Step-by-step explanation:

The formula for calculating the angle between two vectors is expressed as;

u.v = |u||v|cos theta

u.v = (8, 4).(9, -9)

u.v = 8(9)+4(-9)

u.v = 72-36

u.v = 36

|u| = √8²+4²

|u| = √64+16

|u| = √80

|v| = √9²+(-9)²

|v| = √81+81

|v| = √162

36 = √80*√162 cos theta

36 = √12960 cos theta

36 = 113.84 cos theta

cos theta = 36/113.84

cos theta = 36/113.84

cos theta = 0.3162

theta = arccos (0.3162)

<em>theta = 71.6 degrees </em>

<em>Hence the angle between the given vectors is 71.6 degrees </em>

7 0
3 years ago
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Jesse is collecting signatures for a petition. (See the current details of his collection below.) Jesse wants to collect the sam
borishaifa [10]

Answer:

Step-by-step explanation:

Ggjj

4 0
3 years ago
What number is 30% of 20%
vfiekz [6]
0.06 or you can just put 6.

Basically, you have to multiply 30% x 20.

Glad I could help☺️
4 0
2 years ago
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What is the volume of a sphere with a radius of 25.6 cm, rounded to the nearest tenth of a cubic centimeter?
NARA [144]
You sure that’s the radius and not diameter? But if it is, the volume would be 70,276.2 cm
8 0
3 years ago
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