All categories

3 years ago

Complete the square to solve LaTeX: 0=-x^2+4x-5 Also written as 0= -x^2+4x-5

Mathematics

1 answer:

Feliz [49]3 years ago

7 0

X=2+-(plus or minus)i

You might be interested in

What is f(-5) if f(x) = |2x-1| + 10?

Alex777 [14]

Substitute x = -5
|2* -5 -1| + 10
|-10-1| + 10
21

8 0

3 years ago

Solve equation for y: -4x+8y=24

Nesterboy [21]

-4x +8y = 24

8y = 24+ 4x
y = 24/8 + 4x/8
y = 3+ x/2

Hope it helps!
#MissionExam001

4 0

3 years ago

In triangle ABC, AB = 11 cm, BC = 9 cm and CA = 10 cm. Find the area of triangle ABC.

max2010maxim [7]

Answer:

Area = 42.43 square cm

Step-by-step explanation:

Using Heron's Formula :

$Area = \sqrt{s\times (s-a) \times (s-b) \times(s -c)} \ , \ where \ s \ =\ \frac{a+ b+ c}{2}$

Find Area :

$s = \frac{11 + 9 + 10 }{2} = \frac{30}{2} = 15$

$Area = \sqrt{15 \times ( 15 - 11 ) \times { (15 - 9 ) \times ( 15 -10)}\\\\$

$= \sqrt{15 \times 4 \times 6 \times 5}\\\\=\sqrt{1800}$

$= 42 . 43 \ cm^2$

7 0

3 years ago

Find the surface area of the ball shown to the right d=20

netineya [11]

Answer:

<h3>Surface Area = 1,256 cm</h3>

Solution:

formula: Surface Area of a Sphere: 4π · r²

Surface area = 4π · r²

SA = 4(3.14) (10)²

SA = (12.56)(100)

SA = 1,256

7 0

2 years ago

Graph a line with a slope of -3 that contains the point (4, -2)

Crank

Answer:

Step-by-step explanation:

Given that

Slope m=-3

A point (x, y)=(4,-2)

Equation of a line can generally be written as

y=mx+c

Where, m is the slope

And c is the intercept on y-axis

Since we are given m=-3

Then, y=mx+c becomes

y=-3x+c

To get c, let substitute the point given, i.e x=4 and y=-2

y=-3x+c

-2=-3(4)+c

-2=-12+c

-2+12=c

c=-2+12

c=10

y=mx+c, then m=-3 and c=10

Then, the equation the line becomes y = -3x + 10

This is the required line equation

5 0

3 years ago