WILL MARK BRAINLIST please help me ive done this like 9 times and i cant figure this out
will mark brainlist if correct

Answer:

C. x^2 + 2x - 1 = 3

Step-by-step explanation:

The standard form of a quadratic equation is

ax^2 + bx + c = 0

We need to use the quadratic formula and the given expression to find the values of a, b, and c.

The quadratic formula is

[tex] x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} [/tex]

Where the formula has -b, the problem has -2, so b = 2.

Now we have

ax^2 + 2x + c = 0

In the denominator, where the formula has 2a, the problem has 2(1), so a = 1.

Now we have

x^2 + 2x + c = 0

Inside the root, the quadratic formula has -4ac. the problem shows -4(1)(-4). Since we already know that a = 1, then c = -4.

Now we have

x^2 + 2x - 4 = 0

Let's look at choice A.

x^2 + 1 = 2x - 3

Subtract 2x from both sides. Add 3 to both sides.

x^2 - 2x + 4 = 0   This is not it!

Let's look at choice B.

x^2 - 2x - 1 = 3

Subtract 3 from both sides.

x^2 - 2x - 4 = 0     This is not it!

Let's look at choice C.

x^2 + 2x - 1 = 3

Subtract 3 from both sides.

x^2 + 2x - 4 = 0     This is it!

Answer: C. x^2 + 2x - 1 = 3

[tex]x^{2} +2x -1=3[/tex] equation could be solved using this application of quadratic formula.

Option D is correct.

A quadratic equation is an algebraic equation of the second degree in x. The quadratic equation in its standard form is  [tex]ax^{2} +bx +c =0[/tex], where a and b are the coefficients, x is the variable, and c is the constant term.

The quadratic formula is used to find the roots of a quadratic equation.

[tex]x=\frac{-b \pm \sqrt{b^{2} -4ac} }{2a}[/tex]

According to the question

[tex]x=\frac{-2 \pm \sqrt{2^{2} -4(1)(-4)} }{2.1}[/tex]

We all know the quadratic formula for finding the factors of a quadratic equation

[tex]x=\frac{-b \pm \sqrt{b^{2} -4ac} }{2a}[/tex]

By comparing two formulas we get a = 1, b = 2, c = -4

Standard form of quadratic equation is [tex]ax^{2} +bx +c =0[/tex]

Substitute a = 1, b = 2, c = -4 in the standard form of quadratic equation

⇒ [tex]x^{2} +2x-4=0[/tex]

We can write it as

⇒ [tex]x^{2} +2x -1=3[/tex]

[tex]x^{2} +2x -1=3[/tex] equation could be solved using this application of quadratic formula.

Option D is correct.

Find out more information about quadratic formula here

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Answer:

20x-6

Step-by-step explanation:

20x-6

because the product of 20 and a number would be 20 multiplied by that number (in this case, we're representing that number with x), and it says six less than which means 20x subtracted by 6

Answer:

these numbers are greater than not less than

Answer: 816, 81.6%, 0.816, or 81600

Step-by-step explanation:

552 + 264 = 816

81600 as a percent(81.6%)

0.816 as a decimal

102/125 as a fraction

Answer:

9

Step-by-step explanation:

open the bracket, you will have

5x-2x+13=40

collect like terms

5x-2x=40-13

3x=27

divide both side by 3

3x/3=27/3

x=9

Answer: 9

Step-by-step explanation:

5x-(2x-13)=40

Open bracket by -1

5x-2x+13. = 40

3x. = 40-13

3x. =. 27

Divide both sides by 3

x. = 27/3.

x. = 9

PLEASE IF YOU HAVE ANY MORE QUESTIONS PLEASE COMMENT BELOW.

Answer:

Step-by-step explanation:

outer area=

first need to find the circumference of outer diameter

= π×4.8

= 15.079644.... cm

to find the outer curved area you would then do

= 77×15.079644

(ii) =1161.13264 cm²

inner curve area

circumference= π×4

=12.5663706.... cm

77×12.5663706

(i) =967.610537 cm²

total surface area=

as the outer and inner curved areas are already found only the top and bottom surfaces need to be

= area of larger circle

=π×4.8²

=72.382294.... cm²

smaller circle

=π×4²

=50.2654824.... cm²

72.382...-50.265

=22.1168116 x 2

=44.2336232 cm²

total surface area

(iii)= 2172.9768 cm²

(round this to however many decimals you need)

I hope this is understandable and useful!

also how many marks is this for?

take x =initial deposit amount. then make equation:

x+75.5+55.25-25.15-18.65 = 210.85

simplify:

x+86.95 = 210.85

x=210.85 - 86.95

x=123.90

so Initial deposit amount is $123.90

check:  210.85+18.65+25.15-55.25-75.5 = 123.9

123.9 = 123.9

Answer:

A) Parallelogram

B) Rhombus

C) Rectangle

D) Square

Step-by-step explanation:

Quadrilateral ABCD has at least one pair of opposite angles congruent. What types of quadrilaterals meet this condition?

A quadrilateral is a 4 sided polygon or a shape that has 4 sides.

When we say opposite angles are congruent or means that they are similar or equal to each other.

Quadrilateral ABCD has at least one pair of opposite angles congruent. The types of quadrilaterals that meet this condition are:

A) Parallelogram

B) Rhombus

C) Rectangle

D) Square

Answer-

in decimal from: 5.5

in mixed number form: 5 1/2

Answer:

D

Step-by-step explanation:

I dont think this needs explained

Answer:

The last option, it is greater than the distance from the Movie Theater to the Arcade

Step-by-step explanation:

Distance from food court to store is 6 units

Distance from movie theater to arcade is 5 units

Answer:42

Step-by-step explanation:

16+16+10

[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Equations.

[tex]7 {a}^{2}b + 3 {b}^{2} [/tex]

1.) Polynomial ==> Binomial

2.) Degree ==> 2

3.) Terms ==> 2

4.) Name ==> Quadratic Equation in two variables.

5.) Coefficient => 7 and 3

Answer:

1.) Polynomial ==> Binomial

2.) Degree ==> 2

3.) Terms ==> 2

4.) Name ==> Quadratic Equation in two variables.

5.) Coefficient => 7 and 3

Step-by-step explanation:

1.) Polynomial ==> Binomial

2.) Degree ==> 2

3.) Terms ==> 2

4.) Name ==> Quadratic Equation in two variables.

5.) Coefficient => 7 and 3

Answer:

59/8 or 7 3/8

Step-by-step explanation:

make improper fractions, then multiply 1st one by to make denominator equal then subtract

Answer:

7 3/8

Step-by-step explanation:

You have to make 17 1/2 and 10 1/8 into improper fractions, which would be 35/2 and 81/8. Then you have to find a common denominator, which is 16, so you get 280/16 - 162/16. You subtract and get 118/6, which simplifies to 7 3/8. Hope this helps :)

Answer:

44 I think

Step-by-step explanation:

um if it's wrong sorry

Answer:

Step-by-step explanation:

Number of bacteria after 30 minutes:

Correct choice is C

Answer:

after 10 minute total bacteria=2.5×3.3=8.25 millions

in 1 minute total bacteria=2.5×3.3/10 =0.825millions

in 30 minute total bacteria=30×2.5×3.3/10 millions=24.75million is your answer.but i did not get any match.

Answer:

f(-7)=268

Step-by-step explanation:

f(-7)=4x^2 − 10x+2

f(-7)=4(-7)^2-10(-7)+2

f(-7)=4(49)+70+2

f(-7)=196+72

f(-7)=268

Answer:

198

Step-by-step explanation:

4(-7)^2+70+2

196+2=198

Answer:

6

Step-by-step explanation:

Answer:

f (  [tex]x^{2}[/tex]+ 5 ) = 3[tex]x^{2}[/tex] + 13

Step-by-step explanation:

Answer:

dsfsdfgdf

Step-by-step explanation:

Answer:

i cant show you how to but use desmos graphing calculator, copy and paste that equation and it will do it for you

Step-by-step explanation:

Answer:

6.84 weeks

Step-by-step explanation:

$719.95 - $178.95 = 541$

541/79 = 6.84 weeks

Answer:

They're proportional

Step-by-step explanation:

y/x always equals 5

Answer:

<1 and <3

Step-by-step explanation:

Answer:

Step-by-step explanation:

Ratio = 4 :3

Other two sides = 4x , 3x

Pythagorean theorem

(4x)²  + (3x)² = 20²

16x² + 9x²  = 400

          25x² = 400

             x² = 400 ÷ 25

            x²  = 16

             x = √16

x = 4 cm

4x = 4*4 = 16

3x = 3*4 = 12

Sides = 16cm  , 12 cm

y = 2  ( x −3 )  2  −8 is the correct answer to the question

What are the effects on the graph of y=x^2 caused by the values of a, h, and k in the function y=a(x-h)^2+k

Answer:

a) f(10) = 18

b) g-¹(x) = 5x-5

c) 3((3(x-4))

= 3((3x-12)-4))

= 3(3x-16)

= 9x-48

The value of f(10) = 18, g'(x) = 1/5 and ff(x) = 9x - 48​

A function is defined as a relation between a set of inputs having one output each. In simple words, a function is a relationship between inputs where each input is related to exactly one output.

Given that, The functions f and g are such that f(x) = 3(x – 4) and

g(x) = x/5+1

a) f(10) = 3(10-4)

= 3(6)

= 18

b) g'(x) = d/dx(x/5+1)

= 1/5d/dx(x) = 1/5

c) ff(x) =

= 3((3(x-4))

= 3((3x-12)-4))

= 3(3x-16)

= 9x-48

Hence, The value of f(10) = 18, g'(x) = 1/5 and ff(x) = 9x - 48​

For more references on functions, click;

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Answer:

Step-by-step explanation:

Refer to attached picture

Use tangent to solve

Compare the equations above and find the value of d:

Now find the value of h:

Wave Rock is 15 m tall

Answer:

491.34

Step-by-step explanation: (862 x 43)/100 = $370.66 then you 862 - 370.66 = $491.34 i hope this helps

Answer:

$491.34

Step-by-step explanation:

Take $862 x .43 = 370.66

then you take 862.00 and subtact it by 370.66

then you get $491.34