4x^2-8x-45=0 how to solve

Answer:

1: 18.75

Step-by-step explanation:

We multiply both sides by 5.

Step-by-step explanation:

[tex]2 |5 - n| - | - 3| \\ = 2 |5 - 10| - 3 \\ = 2 \times 5 - 3 \\ = 10 - 3 \\= 7[/tex]

[tex]\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘[/tex]

Answer:

1. it is given

2. the definition of angle bisector

3. the reflexive property

4. SAS

5. corresponding parts of congruent triangles are congruent

120.

Trust me.  It is correct using a formula.

Answer:

The triangle is a right triangle

Step-by-step explanation:

We use the pythagorean Theorem which is a^2+b^2=c^2

Now we have 12^2+16^2=20^2

Solve: 144+256=400

400=400

Answer:

81.64

Step-by-step explanation:

Answer:

Step-by-step explanation:

Please be explicit in labeling the radius.   I will assume y ou meant r = 13 m.

Circumference formula:  C  = 2πr; area formula:  A = πr²

Here, with r = 13 m, C = 2π(13 m) = 26π m = C = 81.68 m

and

with r = 13 m, A = π(13 m)^2 = 169π = A = 530.93 m^2

Answer:

80

Step-by-step explanation:

f(3)=4(3)^3-3(3)^2+5(3)-16

f(3)=4(3*3*3)-3(3*3)+15-16

f(3)=4(27)-3(9)+15-16

f(3)=108-27+15-16

f(3)=81+15-16

f(3)=96-16

f(3)=80

Answer:

b = -6

Step-by-step explanation:

14.4 = -2.4b (swap the sides of the equation)

-2.4b = 14.4 (divide both sides of the equation by -2.4)

b = -6

d I think d

Step-by-step explanation:

yayasjsjamaaak

Answer: $8.91

Step-by-step explanation:

Answer:

Y = 4

Step-by-step explanation:

Answer:

16 sq units

Step-by-step explanation:

the area of the polygon =

(4×3)+(½×4×2)

= 12+4

= 16 sq units

Answer:

Part A

False

Part B

True

Part C

True

Part D

True

Step-by-step explanation:

A scatter diagram created with MS Excel shows the data as on the dot plot in a similar question obtained online

The number of students in the group = 92

Part A

The number of students that spend more than 10 hours watching television = 39

Therefore, given that less than half of the student spend more than 10 hours watching television, the statement is false

Part B

The number of students that watch 3 hours of television is the highest than any other time range with 16 students, therefore, the statement is true

Part C

The maximum hours watched by a student in the dot plot is 20 hours, therefore, the statement is true

Part D

The number of hours for which the student watched and which has the highest frequency is 3 hours, therefore, the statement is true as more students have 3 hours as the number of hours watched (16 students) than any other number of hours

Answer:

$42.14

Step-by-step explanation:

Given data

Cost of meal= $98

tax= 9%

Tip= 20%

Let us find the amount of the tax and the tip

Tax

=9/100*98

=0.09*98

=$8.82

Tip

=20/100*98

=0.2*98

=$19.6

Hence the total amount paid is

=98+8.82+19.6

=126.42

The amount paid by Pryia

=126.42/3

=$42.14

Answer:

answer is 9.5 I hope you understand what I wrote

Answer:

m =(-7-√73)/2=-7.772

Step-by-step explanation:

Answer:

m=−7/2+1/2√73 or m=−7/2+−1/2√73

Step-by-step explanation:

Let's solve your equation step-by-step.

m2=−7m+6

Step 1: Subtract -7m+6 from both sides.

m2−(−7m+6)=−7m+6−(−7m+6)

m2+7m−6=0

For this equation: a=1, b=7, c=-6

1m2+7m+−6=0

Step 2: Use quadratic formula with a=1, b=7, c=-6.

m=−b±√b2−4ac/2a

m=−(7)±√(7)2−4(1)(−6)/2(1)

m=−7±√73/2

m=−7/2+1/2√73 or m=−7/2+−1/2√73

Answer:

Mansah obtained 150 mark out of 240 mark in an English test .what was her percentage score

Answer:

135.5"

Step-by-step explanation:

Answer:

8509.4

Step-by-step explanation:

Answer:

[tex]\displaystyle V = 2144.66 \ ft^3[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Geometry

Volume of a Sphere Formula: [tex]\displaystyle V = \frac{4}{3} \pi r^3[/tex]

Step-by-step explanation:

Step 1: Define

Identify variables

r = 8 ft

Step 2: Find Volume

Answer:

54.5

Step-by-step explanation:

Answer:

54.5

Step-by-step explanation:

Hope this helps!! Do you need it in a fraction?

Answer:

D) f(x) = 6x

Step-by-step explanation:

Answer:

I think (c) is the correct answer.

Step-by-step explanation:

The diagonals bisect each other.

Answer: The diagonals are congruent

Step-by-step explanation: (if this is wrong I am sorry) There are Different Types of Quadrilaterals

Trapezium.

Parallelogram.

Rectangle.

Rhombus.

Square.

Kite.

If this is wrong I am very sorry

Answer:

-2(3) + 4x -4 =-14

-6 + 4x -4=-14

4x = -14 + 6 + 4

4x = -4

x=-1

To verify this...Input -1 into the original equation... You'd get -14

Answer:

1. Physical Hazards

2. Ergonomic Hazards

3. Chemical Hazards

4. Biological Hazards

Step-by-step explanation:

Answer:

Ratio = 3:2:1

Let the Values be 3x:2x:x

3x+2x+x=180

=> 6x=180

=> x =180/6

=> x = 30

3×30=90

2×30=60

1×30=30

Answer:

The number you would add to both sides of the equation to use the "Completing the Square" method would be 16.

Step-by-step explanation:

To find the number to add to both sides of an equation to complete the square, divide the first-degree term's coefficient by 2 and square your remainder. In this case, the coefficient of the first-degree term is -8. After dividing by 2 and squaring it, you'll get 16, so that is the number you must add to both sides of the equation in order to complete the square.

Answer:

give him brainliest

Step-by-step explanation:

lol

Answer:

I'm sorry I don't know the answer to it