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2 years ago

Solve the equation: x2 + 7x − 3 = 0

Mathematics

1 answer:

patriot [66]2 years ago

4 0

X = 1/2 ( If the 2 is not an exponent)
x = -7/2 ± √61/2 ( if 2 is the exponent)

Hoped I helped.

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One factor in flood safety along a levee is the area that will absorb water should the levee break. The coordinates that make up

Anit [1.1K]

Let

$A(0,0)\\ B (2.8, 2.1)\\C(4.3, 4.4)$

using a graph tool

see the attached figure

The figure is a triangle

we know that

The Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.

Hero's Formula is equal to

$Area=\sqrt{p*(p-a)*(p-b)*(p-c)}$

where

p is is half the perimeter of the triangle

a,b,c are the lengths of the sides of a triangle

Step $1$

Find the length sides of the triangle

a) Find the distance AB

$d =\sqrt{(y2-y1)^{2} +(x2-x1)^{2}}$

Substitute

$d =\sqrt{(2.1-0)^{2} +(2.8-0)^{2}}$

$d =3.5\ mi}$

b) Find the distance AC

$d =\sqrt{(y2-y1)^{2} +(x2-x1)^{2}}$

Substitute

$d =\sqrt{(4.4-0)^{2} +(4.3-0)^{2}}$

$d =6.15\ mi}$

c) Find the distance BC

$d =\sqrt{(y2-y1)^{2} +(x2-x1)^{2}}$

Substitute

$d =\sqrt{(4.4-2.1)^{2} +(4.3-2.8)^{2}}$

$d =2.75\ mi}$

Step $2$

Find the perimeter of the triangle

$Perimeter= 3.5+6.15+2.75 =12.4\ mi$

Find the half of the perimeter

$p=\frac{12.4}{2} = 6.2\ mi$

Step $3$

Find the area of the triangle

$Area=\sqrt{6.2*(6.2-3.5)*(6.2-6.15)*(6.2-2.75)}$

$Area=\sqrt{6.2*(2.7)*(0.05)*(3.45)}$

$Area= 1.69\ mi^{2}$

therefore

the answer is the option

a) 1.65 mi^2.

4 0

3 years ago

Read 2 more answers

How do I solve this problem step by step?

Rom4ik [11]

Answer:

V = 3

Step-by-step explanation:

Given:

Perimeter of the pentagon is 52 units.

Solve for value of v.

Solve:

Let first put it into a equation base on the given;

6v + 8 + 8 + 3v + 1 + v + 5 = 52

Add the numbers

6v + 22 + 3v + v = 52

Combine like terms

10v + 22 = 52

Subtract 22 from both sides

10v + 22 - 22 = 52 - 22

Simplify

10v = 30

Divide both sides by 10

10v/10 = 30/10

Simplify

v = 3

Check Answer:

6(3) + 8 + 8 + 3(3) + 1 + (3) + 5

18 + 8 + 8 + 3(3) + 1 + (3) + 5

18 + 16 + 9 + 1 + 8

18 + 16 + 9 + 9

18 + 16 + 18

36 + 16

52

Hence, v = 3

For more information:

brainly.com/question/18640399

Kavinsky

6 0

1 year ago

Read 2 more answers

What type of line would the equation y < 7x + 8 have? A dashed line or A solid line?

-BARSIC- [3]

Answer:

A dashed line

Step-by-step explanation:

Because it is just a less than sign but if it was a less than or equal to it would be a solid line.

Hope That Helped :)

5 0

2 years ago

The football team plays at a stadium with

12345 [234]

Answer:

1,100

Step-by-step explanation:

6 0

2 years ago

Can someone answer this question please answer it correctly if it’s corect I will mark you brainliest

lana [24]

Answer:

1/21

Step-by-step explanation:

Cards: 2,3,4,5,6,7,8 7 cards

1st card :5

P(5) = number of 5's / total

= 1/7

Then we keep the card

Cards: 2,3,4,6,7,8 only 6 cards left

card less than 4: 2,3

P (card less than 4) = number of cards less than 4/ total cards

= 2/6 = 1/3

P (5, no replacement, card less than 4) = P(5) * P( less than 4)

= 1/7 * 1/3

=1/21

4 0

3 years ago

Read 2 more answers