Help help math math maths

5x²-2x+16=4x²+6x

5x²-2x+16-4x²-6x=0

x²-8x+16=0

D= b²-4ac

= (-8)²-4×1×16

=0

x=-b/2a

= 8/2

=4

-> B

Answer:

4! I figured it would be more than just one answer but it’s only 4

Step-by-step explanation:

Answer:

Radius.

Step-by-step explanation:

● The distance from the centre to any other point on the circle is known as the radius.

Other Definitions:

● Diameter is the the distance from one point to another point of the circle which passes through the centre of the circle.

● The space enclosed by a figure is known as its area. Area of a circle = πr²

● Circumference of a circle is its outer perimeter. Circumference = 2πr

____________

Hope it helps ⚜

Simplify both sides to compare:

6^2 - 2^2 = 36-4 = 32

4(6+2) = 4 x 8 = 32

they are equal to each other.

Answer: B. =

Answer:

y = -5x + 9.

Step-by-step explanation:

Lets look for the relation between x and y.

Try the first one:

When x = -2, y = -(-2) + 10 = 12  

In the table y = 1 so its not this one.

Number 2:

x = -2, y = 10(-2) + 1  = -18 - Not thios one

Number 3:

When x = -2, y = -10(-2)  - 9 = 11

Not this one

Number 4:

y = -5(-2) - 9 = 1

This is the one.

Check again with x = 0:

When x = 0, y = -5(0) - 9 = -9.

The length of guy wire needed to make an angle of 30° with the ground is 310 feet. The angle between the end of the shadow and the vertical side of the building is 23°

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

a) Let l represent the length of the guy wire.

sin(30) = (170 - 15) / l

l = 310 feet

b) Let Ф represent the angle, hence:

tanФ = 100/230

Ф = 23°

The length of guy wire needed to make an angle of 30° with the ground is 310 feet. The angle between the end of the shadow and the vertical side of the building is 23°

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Answer:

1.5 litres

Step-by-step explanation:

1/2 of the punch in a 3 litre bottle is found by dividing 3 by 2, splitting it in half. 3÷2=1.5, or 1 and a half litres

Answer:

betwen year 5 and 6

Step-by-step explanation:

th prize will drop betwen 5 and 6 years.

i think its the correct answer

Answer:

a < c < b

Step-by-step explanation:

The sum of the interior angles of a triangle is 180°

Therefore, the measure of the missing angle (opposite side c) is:

180° - 69° - 54° = 57°

Relationship between sides and interior angles of any triangle:

Therefore, from inspection of the triangle:

So the side lengths in increasing order are:

a < c < b

Rest angle:-

Note that smaller side has smaller opposite angle

Hence the order is

To find the surface area:

  ⇒ let's define what makes up the surface area of a cylinder

      ⇒ it is made up of two circles as its bases and its side is a long

          rectangular piece curved around

Area of Two Circles

⇒ Area of Circle Formula = [tex]\pi r^{2}[/tex]

     ⇒ Area of Two Circle Formula = [tex]2\pi r^{2}[/tex]

         ⇒ since r: is length of radius --> 0.75 cm (radius is half of diameter)

             ⇒ Area of Two circles:  [tex]2\pi (0.75)^{2} =3.5343[/tex]

Area of Rectangular piece curved around to form Cylinder

  ⇒ length: circumference of a circle ⇒ [tex]2\pi r[/tex]

       ⇒ width: height of the cylinder ⇒ 5cm

          ⇒ Area of Rectangular piece: [tex]2*\pi *0.75*5=[/tex] 23.5169

Total Area = 27.0512 = 8.6257[tex]\pi[/tex] square centimeters ⇒ Choice (B)

Hope that helps!

Answer:

56.25

Step-by-step explanation:

i just did the test

Answer:

If I did the math right you should get this answer: x<=1

Step-by-step explanation:

5x<=-3x+8

5x+3x<=-3~x+8+3x

8x<=-3x+8+3x

8x<=-3x+3x+8

8x<=8

4\5 divided by 3\7

4/5 ÷ 3/7

4 = dividend numerator

5 = dividend denominator

3 = divisor numerator

7 = divisor denominator

To make it a fraction form answer, you multiply the dividend numerator by the divisor denominator to make a new numerator.

you multiply the dividend denominator by the divisor numerator to make a new denominator:

4 × 7/ 5 × 3

= 28/15

Thus, the answer to 4/5 divided by 3/7 in fraction form is 28/15.

Answer:

Hello! Here are your answers for Part A:

4(x + 6) - 11 = 25 is a multi-step equation.

-1/2(2/3a - 4) = 1/2a - 7 is an equation with rational coefficients.

y - 23 = 8 is a one-step equation.

-3m - 2 = -17 is a two-step equation.

For Part B:

Find the common denominator -

x/2 - 7 = 4

x/2 + 2(-7)/2 = 4

Combine the fractions with the common denominator -

x/2 + 2(-7)/2 = 4

x + 2(-7)/2 = 4

Multiply the numbers -

x + 2(-7)/2 = 4

x - 14/2 = 4

Multiply all terms by the same value to eliminate fraction denominators -

x - 14/2 = 4

2 * x - 14/2 = 2 * 4

Cancel multiplied terms that are in the denominator -

2 * x - 14/2 = 2 * 4

x - 14 = 2 * 4

Multiply the numbers -

x - 14 = 2 * 4

x - 14 = 8

Add 14 to both sides -

x - 14 = 8

x - 14 + 14 = 8 + 14

Simplify -

x - 14 + 14 = 8 + 14

x = 8 + 14

x = 22

The solution to this equation is 22. 6 is NOT a solution.

Hope this helps! Have a great day.

Based on the net cashflow over the three year life, the NPV that Sausage Hut will realize is -$17,891.

First find the present value of the increased cashflows. As it is a constant amount of $123,300, we can treat it as an annuity.

Present value = Amount x (Present value of annuity interest factor, 9%, 3 years)

= 123,300 x 2.5313

= $312,109.29

The net present value is:
= Present value of cashflows - Amount invested

= 312,109.29 - 330,000

= -$17,890.71

= -$17,891.

In conclusion, option B is correct.

Find out more on Net Present Value at https://brainly.com/question/13228231.

Answer:

7

Step-by-step explanation:

To evaluate an expression given a valeu means to substitute the value in. So :

1/2(2)^4 - 1/4(2)²

First we do powers since we follow BODMAS/BIDMAS :

1/2(16) - 1/4(4)

Now we do multiplication:

8 - 1

Now we do the only step left of simplification through subtraction:

8 - 1 = 7

Hope this helped and brainliest please

The value of (1/2)x⁴ - (1/4)x² when x = 2 is 7.

Expressions are mathematical statements which consist of two or more terms and terms are connected to each other using mathematical operators like addition, multiplication, subtraction and so on.

Given expression is (1/2)x⁴ - (1/4)x².

We have to calculate the value of the expression when x = 2.

Substitute x = 2 in the expression.

(1/2)x⁴ - (1/4)x² = (1/2) (2)⁴ - (1/4) (2)²

                       = (1/2) × 16 - (1/4) × 4

                       = 16/2 - 4/4

                       = 8 - 1

                       = 7

Hence the value of the expression when x = 2 is 7.

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The perimeter of the room is 624 inches.

We need 657 tiles to cover the floor.

We need to add 66 extra tiles to account for the overage due to grout and waste.

A rectangle is a 2-D shape with length and width.

The length and width are different.

If the length and width are not different then it is a square.

The area of a rectangle is given as:

Area = Length x width

We have,

Length = 10 ft 9in

Width = 15ft 3 in

a.

Perimeter = 2 (Length + Width)

Length = 10 ft 9 in = (10 x 12) + 9 = 129 in.

Width = 15 ft. 3 in. = (15 x 12) + 3 = 183 in

Perimeter.

= 2(129 + 183)

= 624 in.

b.

Area = Length x Width

Area = 129 in. x 183 in

Area == 23,607 in²

Each tile covers an area of 6 in. x 6 in

Area of tiles = 36 in²

So,

The number of tiles required.

= Area ÷ Tile area

= 23,607 in² ÷ 36 in²

≈ 656.3 tiles.

c.

10% of 657

= 10/100 x 657  

= 0.1 x 657

= 65.7

= 66

Thus,

The perimeter of the room is 624 inches.

We need 657 tiles to cover the floor.

We need to add 66 extra tiles to account for the overage due to grout and waste.

Learn more about rectangles here:

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>.

hope it helps...!!!!!!

Answer:

B.f(x)=4/2(x+1/2-3

Answer:

Bottom left & bottom right

Step-by-step explanation:

Bottom left & bottom right are only being moved in x-axis (i direction) & y-axis (j direction)

Top left uses translation and rotation

To right uses reflection

Answer:

6 hours and 30 minutes my dude

Answer:

Step-by-step explanation:

You got 91% of the questions right out of 175. In math words, this is saying that:

[tex]\frac{91}{100}*175=x[/tex]

[tex]x=159.25[/tex]

So, you got 175 - 159 = 15.75 questions wrong. The decimal could be from getting only part of a question wrong. So you got partial credit for one question

Answer: 15

Step-by-step explanation:

160/175

=0.914285714285 or 0.91

175-160

=15

...And there you go

Answer:

Step-by-step explanation:

(a). sin2x + sinx = 0  ( 0 ≤ x ≤ 2π )

sin2x = 2sinx(cosx)

2 ( sin x )( cos x ) + sin x = 0

sin x ( 2 cos x + 1 ) = 0

sin x = 0 ⇒ x = 0 , [tex]\pi[/tex] , [tex]2\pi[/tex]

2 cos x = - 1

cos x = [tex]-\frac{1}{2}[/tex]  ⇒ x = [tex]\frac{2\pi }{3}[/tex] , [tex]\frac{4\pi }{3}[/tex]

x ∈ { 0 , [tex]\frac{2\pi }{3}[/tex] , [tex]\pi[/tex] , [tex]\frac{4\pi }{3}[/tex] , [tex]2\pi[/tex] }  

(b). sin 2x - 2 cos x = 0 ( 0 ≤ x ≤ 2π )

2 cos x ( sin x - 1 ) = 0

cos x = 0 ⇒ x = [tex]\frac{\pi }{2}[/tex] , [tex]\frac{3\pi }{2}[/tex]

sin x = 1 ⇒ x = [tex]\frac{\pi }{2}[/tex] , [tex]\frac{3\pi }{2}[/tex]

x ∈ {  [tex]\frac{\pi }{2}[/tex] , [tex]\frac{3\pi }{2}[/tex] }  

Answer:

V = 2 144.66058485063 m³

Step-by-step explanation:

Formula : ( volume V of a sphere of radius r )

[tex]V\ =\ \frac{4}{3} \times \pi \times r^{3}[/tex]

Therefore

[tex]V\ =\ \frac{4}{3} \times \pi \times 8^{3}[/tex]

[tex]V\ =\ \frac{4}{3} \times \pi \times 512[/tex]

⇒ V = 2 144.66058485063 m³ (use a calculator)