9// Please help for 20 points!! thank you if you help

Answer:

(147 - 298)/298 x 100

-151/298  × 100

Change ≈ -50.6711%

Step-by-step explanation:

Answer:

102.7

Step-by-step explanation:

your starting number is 147,

your earned number is 298,

to get the percentage, it will be in decimal form

the answer is-

102.72108843537416 %

Now you round to the nearest tenth-

102.7

I hope this helps you-

Step 1: Calculate the change (subtract old value from the new value) ...

Step 2: Divide that change by the old value (you will get a decimal number)

Step 3: Convert that to a percentage (by multiplying by 100 and adding a "%" sign)

Answer: 72

Step-by-step explanation:

convert 68% to decimal:

0.68

Multiply by 225

0.68*225

= 153

Subtract:

225-153=
72

Answer:

-9

Step-by-step explanation:

        The additive inverse of 4 is -4. Why? 4 + -4 = 0

-4 - 5 = -9

Answer:

i think -9

Step-by-step explanation:

[tex]\\ \rm\Rrightarrow r=2cos\theta-3sin\theta[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{2}{r}cos\theta-\dfrac{3}{r} sin\theta=1[/tex]

[tex]\\ \rm\Rrightarrow 2x-3y=1[/tex]

[tex]\\ \rm\Rrightarrow 2x-3y-1=0[/tex]

Answer:

[tex](x-1)^2+(y+1.5y)^2=3.25[/tex]

Step-by-step explanation:

[tex]x=r \cos(\theta)[/tex]

[tex]y=r \sin(\theta)[/tex]

Given polar equation:

[tex]r=2\cos(\theta)-3 \sin(\theta)[/tex]

Multiply both sides by r:

[tex]r^2=2r\cos(\theta)-3r \sin(\theta)[/tex]

Know that [tex]x^2+y^2=r^2[/tex]:

[tex]x^2+y^2=2r\cos(\theta)-3r \sin(\theta)[/tex]

Substitute [tex]x=r \cos(\theta)[/tex] and [tex]y=r \sin(\theta)[/tex] :

[tex]x^2+y^2=2x-3y[/tex]

Therefore,

[tex]x^2-2x+y^2+3y=0[/tex]

Complete the square:

[tex](x-1)^2-1+(y+1.5y)^2-2.25=0[/tex]

[tex](x-1)^2+(y+1.5y)^2=3.25[/tex]

Answer:

1436.8 cm3

Step-by-step explanation:

4/3  π r^3 ; r = 7 (substitute)

4/3 π (7)^3 (cube)

4/3 π 21 (reorder)

4/3 (21) π (muptiply)

28 π (multiply)

87.96..... (round)

88cm^3

Answer:

Step-by-step explanation:

Mid point :

[tex] \frac{x_1 + x_2}{2} \: \frac{y_1 +y _2}{2} [/tex]

x1 = 5

y1 = 8

x2 = 1

y2 = 2

Midpoint :

[tex]( \frac{5 + 1}{2} \: \frac{8 + 2}{2} ) \\ ( \frac{6}{2} \: \frac{10}{2} )[/tex]

Simplify

[tex](3 \: 5)[/tex]

Answer:

3x+5

Step-by-step explanation:

That is your answer

Answer: READ MY EXPLANATION.

Yes, both of them have 90 degrees And sided triangles.

Step-by-step explanation: Hi m4rra! I'm sorry to say but your account has been reported quite a few times and you may want to start a new account, it has been reported by the following people: maylie186, ionfieldbest, gtchappymuch, and many more. I'm going to repeat what I mean but in less formal words. your account has been reported quite a bit, we are going to need you to delete this account. you may make a new one if you wish. . . sincerely, . The Brainly Team

Answer:

-1D

Step-by-step explanation:

1D + -4D + 2D = -1D

Answer: the square root of 25 is 5

and also it’s an app called Desmos that finds the square root for you !

The maximum height of the road which is made in such a way that the center of the road is higher off the ground than the sides of the road is 16 feet.

The maxima of a parabola is where, it opens down its vertex at the maximum point in a coordinate graph. By equating the derivative of equation of parabola equal to zero, it can be found out.

A road is made in such a way that the center of the road is higher off the ground than the sides of the road, in order to allow rainwater to drain.

A cross-section of the road can be represented on a graph using the function,

[tex]f(x) = (x - 16)(x+ 16),[/tex]

Here, x represents the distance from the center of the road, in feet.

This equation can be written as,

[tex]f(x) = (x - 16)^2[/tex]

Now to find the maximum height, find the derivative of the above function as,

[tex]f(x) = (x - 16)^2\\f'(x) = (x - 16)^2\\f'(x)=2(x-16)(1)\\f'(x)=2(x-16)[/tex]

Equate the above equation to zero as,

[tex]0=2(x-16)\\0=x-16\\x=16[/tex]

Thus, the maximum height of the road which is made in such a way that the center of the road is higher off the ground than the sides of the road is 16 feet.

Learn more about the maxima of parabola here;

https://brainly.com/question/5399857

Answer:

Step-by-step explanation:

The area of a compound figure is the sum of the areas of its parts. The perimeter is the sum of the lengths of all of the edges.

This compound figure is conveniently divided into a semicircle of radius 2.5 and a trapezoid with bases 5 and 7, and height 3.

Semicircle

The area of the semicircle is half the area of a circle with the same radius. It will be ...

  A = 1/2πr²

  A = 1/2π(2.5²) = 3.125π . . . . square units

Trapezoid

The area of the trapezoid is given by the formula ...

  A = 1/2(b1 +b2)h

  A = (1/2)(5 +7)(3) = 18 . . . . square units

Then the total area of the figure is ...

  3.125π +18 ≈ 27.8 . . . . square units

__

Perimeter

The perimeter will be the sum of the lengths of the straight line segments and the length of the semicircular arc.

Arc

  The arc length is half the circumference of the circle, so is ...

  arc = 1/2(2πr) = πr = 2.5π . . . . units

Diagonal segments

The figure is bounded by two congruent line segments that are each the hypotenuse of a triangle 1 unit wide and 3 units high. The Pythagorean theorem tells us that length is ...

  diagonal length = √(1² +3²) = √10 . . . . units

The two diagonal sides have a total length of 2√10 units.

Horizontal segments

The figure is bounded by two congruent horizontal segments of length 1 unit each, and one horizontal segment of length 5 units. Their total length is ...

  horizontal length = 1 + 1 + 5 = 7 . . . . units

The total perimeter is ...

  perimeter = horizontal length + diagonal length + arc length

  7 +2√10 +2.5π ≈ 21.2 . . . . units

On arranging the given data in ascending order of their magnitudes, we get :

➙ 7 , 9 , 11 , 13 , 15 , 17 , 19

Clearly, n = 7, which is an odd number.

★ Lower Quartile (Q¹)

★ Upper Quartile (Q³)

★ Inter-Quartile range

⇒ Q³- Q¹

⇒ 17 - 9

⇒ 8

You're answer would be 6x3 + 14x2 + 6x - 12

Answer: The correct answer is 44.60

Step-by-step explanation:

Let's find the area of the rectangle first, and then add it with the area of the Circle to find the total area of the whole shape.

We know that the area of a Rectangle is L(Length) x W(Width)

So using the given information, 8 x 4 = 32

So the Area of the Rectangle = 32

Now let's find the area of the given circle,

Area of a Circle: πr2                                     Remember ^ = stands for power

The radius is half of the diameter

The diameter of the circle is 4

4/2 = 2 which is our radius, and now let's replace it in the equation.

= 3.14(r)^2

= 3.14(2)^2

= 3.14(4)

= 12.56 or some may have got 12.57

So now we add all areas together to get the total area,

32+12.57 = 44.57

Now rounding off to the nearest tenths, would give us 44.60

So the area of the figure rounded to the nearest tenth is 44.60

Answer:

[tex]44.56[/tex]

Step-by-step explanation:

Rectangle area:

[tex]4 \times 8 = 32[/tex]

2 circles area (full circle, since they are both a half of circle):

[tex] { (\frac{4}{2}) }^{2} \times π = 12.56[/tex]

Total area:

[tex]32 + 12.56 = 44.56[/tex]

It is the last choice

[tex]9x+12y\geq 1000[/tex]

Hope that helps!

Step-by-step explanation:

2^x < 2x³ + 1 ?

that would mean

x < log2(2x³ + 1)

x < log2(2×(x³ + 1/2))

x < log2(2) + log2(x³ + 1/2)

x < 1 + log2(x³ + 1/2)

x - 1 < log2(x³ + 1/2)

for large x the "-1" and the "+ 1/2" are becoming relatively irrelevant for the inequality.

and the limes of this goes to

x < log2(x³)

which is not true for large x, as the logarithm turns into a very flat curve, while "x" just keeps growing with slope 1 and therefore outpaces the logarithm.

for x = 20 for example, 2^x is already way larger than 2x³.

the "cross-over" point is between x=11 and x=12.

from there on 2^x will quickly become much larger than 2x³ + 1.

33.5

Step-by-step explanation:

9² + 6²

→ 81 + 36

→ 117

Answer : 117

Answer:

Part A: Only 460 is divisible by 2

Part B: 385, and 460 are divisible by 5

Part C: Only 460 works for this one

Answer:

[tex]y < -2x+20[/tex]

Step-by-step explanation:

[tex]2x+y < 20[/tex]

[tex]\mathrm{Subtract\:}y\mathrm{\:from\:both\:sides}[/tex]

[tex]2x+y-y < 20-y[/tex]

[tex]\mathrm{Simplify}[/tex]

[tex]2x < 20-y[/tex]

[tex]\mathrm{Divide\:both\:sides\:by\:}2[/tex]

[tex]\frac{2x}{2} < \frac{20}{2}-\frac{y}{2}[/tex]

[tex]\mathrm{Simplify}[/tex]

[tex]x < \frac{20-y}{2}[/tex]

[tex]Also[/tex] [tex]written[/tex] [tex]as[/tex] [tex]y < -2x+20[/tex]

Answer:

y= mx + b

y< -2x +20

Step-by-step explanation:

2x+y<20

Subtract 2x

from both sides of the inequality. y<20

−2x

Rearrange terms. y<−2x+20

The x- and y- coordinates of point P on the directed line segment from K to J such that P is Three-fifths the length of the line segment from K to J is  (85, 105).

Given

On a coordinate plane, a line is drawn from point K to point J. Point K is at (160, 120) and point J is at (negative 40, 80).

The coordinates point any point can be found by using the following formula.

[tex]\rm X=\dfrac{m}{m+n}(x_2-x_1)+x_1\\\\ Y=\dfrac{m}{m+n}(y_2-y_1)+y_1[/tex]

The x- and y- coordinates of point P on the directed line segment from K to J such that P is Three-fifths the length of the line segment from K to J is;

[tex]\rm X=\dfrac{m}{m+n}(x_2-x_1)+x_1\\\\ X = \dfrac{3}{3+5}(-40-160)+160\\\\ X = 3 \times (-25)+160\\\\\X = -75+160\\\\ X = 85\\\\\ Y=\dfrac{m}{m+n}(y_2-y_1)+y_1\\\\ Y=\dfrac{3}{3+5}(80-120)+120\\\\Y =- 3\times 5 +`120\\\\Y=-15+120\\\\Y=105[/tex]

Hence, the x- and y- coordinates of point P on the directed line segment from K to J such that P is Three-fifths the length of the line segment from K to J is  (85, 105).

To know more about co-ordinates click the link given below.

https://brainly.com/question/13847533

Answer:

B

Step-by-step explanation:

Answer:

1-5

Step-by-step explanation:

5 - 1 = 4

Answer:

a) No because the gallons and quarts of oil you and your friend bought is proportional.

b) Yes because the gallons and quarts of oil are no longer proportional.

c) 1 gallon of gasoline = $3.55

   1 quart of oil = $5.00

Step-by-step explanation:

Let g = cost per gallon of gasoline

Let q = cost per quart of oil

a)  Creating expressions from the given information:

10g + 2q = 45.50

5g + q = 22.75

From inspection, we can see that if we multiply the second equation by 2, it will give us the first equation.  Therefore, they are proportional and we cannot determine the variables.

b) Creating expressions from the given information:

10g + 2q = 45.50

5g + q = 22.75

8g + 2q = 38.40

From inspection, we can see that the third equation is not proportional to equations 1 and 2.  Therefore, we can use this equation with either of the other equations to determine the variables.

c)

Using equations 2 and 3 from the previous part (b):

5g + q = 22.75

8g + 2q = 38.40

Rewrite 5g + q = 22.75 to make q the subject:

⇒ q = 22.75 - 5g

Substitute into 8g + 2q = 38.40 and solve for g:

⇒ 8g + 2(22.75 - 5g) = 38.40

⇒ 8g + 45.5 - 10g = 38.40

⇒ 2g = 7.1

⇒ g = 3.55

Substitute found value for g into q = 22.75 - 5g and solve for q:

⇒ q = 22.75 - (5 x 3.55)

⇒ q = 5

Answer:

the answer is 25.50

Step-by-step explanation:

so you multiply 25×.15 which gives 3.75.

you subtrct that from 25. 25-3.75=21.25.

then multiply 21.25 by .20. 21.25×.20=4.25

add that to 21.25 and you get 25.50

Answer:

25.50

Hope it helps

Answer:

I believe the answer is D.) three and three eighteenths

Explanation:

5 3/6 = 33/6

2 1/3 = 7/3 = 14/6

33/6 - 14/6 = 19/6 = 3 1/6 or 3 3/18

I hope I helped! ^-^

Answer:

Step-by-step explanation:

if it is linear then it will be a straight line(gradient is the same)

if quadratic then curve(gradeint isnt the same)

y=mx+c

m=[y(2)-y(1)]/[x(2)-x(1)]

you can choose any 2 points from the table

m=2-0.4/0-1

m=-1.6

repeat but 2 different coordinates

m=0.4-0.08/-1--2==>-2.24

m=-2.24

different coordinate therefore quadratic

cant be exponential, because nothing is being raised to some power

Answer:

Step-by-step explanation: