News cameras take an overhead picture of a part of a crowd at an outdoor event. Journalists then count the number of people in the picture and use the sample to estimate the total number of people in the crowd. This process is an example of

Answer:he needs to sell 180 cookies or more

Step-by-step explanation:

90.00/.50=180

Answer:

8 : 1

Step-by-step explanation:

Given ratio of sides = a : b, then

ratio of area = a² : b²

ratio of volumes = a³ : b³

Given

ratio of areas = 384 : 96 = 4 : 1 ← in simplest form, then

ratio of sides = [tex]\sqrt{4}[/tex] : [tex]\sqrt{1}[/tex] = 2 : 1

Hence

ratio of volumes = 2³ : 1³ = 8 : 1

Answer: 1:2 ratio

Step-by-step explanation:

Total-red roses=pink roses

24-16=8

8:16

GCF: 8

16/8=2

8/8=1

1:2 ratio

pink:red

The ratio of pink to red roses 1:2 ratio

Total-red roses=pink roses

24-16= 8

8:16

GCF: 8

16/8=2

8/8=1

1:2 ratio

pink : red

A ratio indicates how many times one number contains another.

The numbers in a ratio may be quantities of any kind, such as counts of people or objects, or such as measurements of lengths, weights, time, etc. In most contexts, both numbers are restricted to be positive.

Ratios can be reduced (as fractions are) by dividing each quantity by the common factors of all the quantities. As for fractions, the simplest form is considered that in which the numbers in the ratio are the smallest possible integers.

Thus, the ratio 40:60 is equivalent in meaning to the ratio 2:3, the latter being obtained from the former by dividing both quantities by 20. Mathematically, we write 40:60 = 2:3, or equivalently 40:60∷2:3. The verbal equivalent is "40 is to 60 as 2 is to 3."

Ratios may also be established between incommensurable quantities (quantities whose ratio, as the value of a fraction, amounts to an irrational number). The earliest discovered example, found by the Pythagoreans, is the ratio of the length of the diagonal d to the length of a side s of a square, which is the square root of 2, formally.

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Answer:

No; 1,000 will cause him to exceed 1,800.

Step-by-step explanation:

Given,

The consumed calories = 1,600,

Burned calories = 400,

Thus, the remaining calories = 1600 - 400 = 1200

Since, 1,800 calories per day would be like to keep,

Also, 1200 < 1800

Hence, remaining calories is less than the required calories,

And, the calories left to consume for the day = Required calories - remaining calories

= 1800 - 1200

= 600

Therefore, 600 is the viable solution to this problem.

Note : If 1,000 a viable solution to this problem then the required calories will be more than 1800 or exceed 1800.

Answer:

295261.98 or just 295.2962 (rounded).

Step-by-step explanation:

You have to figure out how many ml are in a gallon. Then multiply that by 3.9 gallons.

Answer:

86%

Step-by-step explanation:

64.97/ 75 = 0.8662...

0.8662 x 100 = 86%

but it weighted so:

0.8662 x actual weighted % =  % got out of weighted %

example:

Test is Weighted 25% out of 100%

0.8662 x 25% = 21 %

this case you got 21% out of 25% for the test

The answer to your question is 0.55555555555

Solution: You simply divide 5 by 9 to get your whole number. In other words, 5/9 =0.55555555555

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The fraction 5/9 cannot be converted into a whole number because it results in a decimal number (approximately 0.55) upon division.

In Mathematics, we have different types of numbers - whole numbers, fractions, decimals, etc. Here, you are asked to convert a fraction 5/9 into a whole number. However, it's essential to understand, that 5/9 cannot be converted into a whole number because it is less than 1.

For general understanding, a whole number can only be a non-negative number without any fractional or decimal parts, such as 0, 1, 2, 3, 4, and so forth. A fraction like 5/9 implies division, and when you divide 5 by 9, you get a decimal number (approximately 0.55), which is not a whole number.

Thus, the fraction 5/9 cannot be precisely converted into a whole number without rounding it off.

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Answer:

x = ±√ 24.500 = ± 4.94975

Step-by-step explanation:

:  (A+B) • (A-B) =

        A2 - AB + BA - B2 =

        A2 - AB + AB - B2 =  

        A2 - B2

Step-by-step explanation:

4x² + 98 = 0

2x² + 49 = 0

2x² = -49

x² = -49/2

x = ±√(-49/2)

x = ±7i√(1/2)

x = (±7i√2) / 2

Answer:

[tex]\large\boxed{(f+g)(x)=5x+3}[/tex]

Step-by-step explanation:

[tex](f+g)(x)=f(x)+g(x)\\\\f(x)=2x-6,\ g(x)=3x+9\\\\\text{Substitute:}\\\\(f+g)(x)=(2x-6)+(3x+9)\\\\=2x-6+3x+9\qquad\text{combine like terms}\\\\=(2x+3x)+(-6+9)\\\\=5x+3[/tex]

Answer:

[tex]\large\boxed{-\dfrac{5}{4}=-1\dfrac{1}{4}}[/tex]

Step-by-step explanation:

[tex]\text{Put the values of x = -1 and y = -5 to the expression}\ \dfrac{x^2y}{4}:\\\\\dfrac{(-1)^2(-5)}{4}=\dfrac{(1)(-5)}{4}=\dfrac{-5}{4}[/tex]

Answer:

y-4 = (-1/3)(x+1)

Step-by-step explanation:

We need to identify the equation in point slope form.

The standard equation of point slope form is:

(y-y₁) = m (x-x₁)

where m is the slope and x₁ and y₁ are the points

We are given point(4,-1) so,

x₁=4 and y₁=-1

And a perpendicular line: y =3x+5

Which is equal to y = mx+b

where m is slope so, slope m = 3

Since the line is perpendicular, so the slope in negative inverse of actual slope that m = -1/m

i.e, m = -1/3

So, the equation in point slope form is:

y-(-1) = (-1/3)(x-4)

=> y+1 = (-1/3)(x-4)

Answer:

The equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1) is y = -⅓x + ⅓

Step-by-step explanation:

Given

Let P represent the lind

Equation of P; y = 3x + 5

Let Q represent the other point.

Coordinates of Q; Q(4,-1)

It is said that the line P is perpendicular to point Q.

So, the first thing to do is to calculate the slope of Q;

Since both lines are perpendicular, then we make use of formula for calculating the condition of perpendicularity

This is given as m1m2 = -1

Where m1 = slope of P

m2 = slope of Q

To get m1;

m1 is the coefficient of x in equation of line P.

So, m1 = 3.

Now we can solve for m2

m1.m2 = -1. ---- make m2 the subject of formula

m2 = -1/m1

Substitute 3 for m1

m2 = -1/3

m2 = -⅓

Recall that the coordinates of Q is 4 and -1.

To calculate the equation of Q; we make use of the following

m = (y - y1)/(x - x1)

Where m = m2 = -⅓

x1 = 4 and y1 = -1

By substituton, we have

-⅓ = (y - (-1))/(x - 4)

-⅓ = (y + 1)/(x - 4) --- multiply both sides by 3(x - 4)

-⅓ * 3(x - 4) = 3(x - 4) * (y + 1)/(x - 4)

-(x - 4) = 3(y + 1)

-x + 4 = 3y + 3 --- make y the subject of formula

3y = -x + 4 - 3

3y = -x + 1 --- divide through by 3

3y/3 = (-x + 1)/3

y = -x/3 + 1/3

y = -⅓x + ⅓

Hence, the equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1) is y = -⅓x + ⅓

Answer:

[tex]56wx - 15yz - \frac{29}{3} [/tex]

Step-by-step explanation:

[tex]1. \: 56wx - 5y \times 3z - 9 - \frac{2}{3} \\ 2. \: 56wx - 15yz - 9 - \frac{2}{3} \\ 3. \: 56wx - 15yz + ( - 9 - \frac{2}{3} )[/tex]

The expression equivalent to given condition is 56wx - 15yz - 29/3.

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.

Given expression,

(8w.7x - 5y.3z - 9) - 2/3

since variables are in the product, so their constants are multiplied,

8w.7x  = 56wx

5y.3z  = 15yz

the equation can be written as,

56wx - 15yz - 9 - 2/3

and   - 9 - 2/3 = (-27 - 2)/3 = -29/3

=> 56wx - 15yz - 29/3

Therefore, the equivalent form of the equation is  56wx - 15yz - 29/3.

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Answer:

C:  x = 1/2

Step-by-step explanation:

Set the divisor, 2x - 1, equal to zero and solve for x:  2x = 1, so x = 1/2.  Statement C is true.

Answer:

The correct option is C.

Step-by-step explanation:

If a function f(x) is completely divisible by (x-a), it means (x-a) is a factor of f(x) and x=a is a root of that polynomial.

The given polynomial is

[tex]P(x)=2x^2+9x-5[/tex]

It is given that when David divide the above polynomial by (2x-1), then he get

[tex]Quotient=x+5[/tex]

[tex]Remainder=0[/tex]

Since the remainder is zero it means P(x) is completely divisible by (2x-1) or (2x-1) is a factor of P(x).

[tex]2x-1=0[/tex]

Add 1 on both the sides.

[tex]2x=1[/tex]

Divide both sides by 2.

[tex]x=\frac{1}{2}[/tex]

It means [tex]\frac{1}{2}[/tex] must be a root of the polynomial [tex]2x^2+9x-5[/tex].

Therefore, the correct option is C.

Answer:

b. 3

Step-by-step explanation:

In a 30°-60°-90° triangle, the short side is ½ the hypotenuse [the long side is double the short side].

30°-60°-90° Triangles

x√3 → long side

x → short side

2x → hypotenuse

45°-45°-90° Triangles

x → two legs

x√2 → hypotenuse

I am joyous to assist you anytime.

Answer:

Part 1) [tex]A=96\ cm^{2}[/tex]

part 2) [tex]A=40.8\ ft^{2}[/tex]

Step-by-step explanation:

Part 1)

we know that

The area of a trapezoid is equal to

[tex]A=(1/2)[b1+b2]h[/tex]

In this problem we have

[tex]b1=12\ cm[/tex]

[tex]b2=6+12+2=20\ cm[/tex]

[tex]h=6\ cm[/tex] ----> perpendicular distance between the two bases

substitute

[tex]A=(1/2)[12+20](6)[/tex]

[tex]A=96\ cm^{2}[/tex]

Part 2)

we know that

The area of a kite is equal to

[tex]A=(1/2)[D1*D2][/tex]

we have

[tex]D1=10.2\ ft[/tex]

[tex]D2=8\ ft[/tex]

substitute

[tex]A=(1/2)[10.2*8][/tex]

[tex]A=40.8\ ft^{2}[/tex]

Answer:

25) 96 cm²

26)  40.8 ft ²

Step-by-step explanation:

25) To find the area of trapezoid

Area of trapezoid = h(a + b)/2

Here a = 6 + 12 + 2 = 20 cm

b = 12 cm and h = 6

Area =  h(a + b)/2

 = 6(20 + 12)/2

 = 96 cm²

26) To find the area of kite

Area of kite = pq/2

Where p and q are the two diagonals

Here p = 10.2 ft and q = 8 ft

Area = pq/2

 = (10.2 * 8)/2 = 40.8 ft²

The correct answer: D

Hi.

Answer:

[tex]\boxed{x>17}\checkmark[/tex]

The answer should have positive sign but not negative.

Step-by-step explanation:

First, you add by 8 from both sides.

[tex]6x-8+8>4x+26+8[/tex]

Then, simplify.

[tex]6x>4x+34[/tex]

Next, you do is subtract by 4x from both sides.

[tex]6x-4x>4x+34-4x[/tex]

Simplify.

[tex]2x>34[/tex]

Therefore, you divide by 2 from both sides.

[tex]\frac{2x}{2}>\frac{34}{2}[/tex]

Finally, you solve and simplify.

[tex]34/2=17[/tex]

[tex]x=17\checkmark[/tex]

X=17 is the correct answer.

Hope this helps you!

Have a nice day! :)

Answer:

The solution for the inequality is x>17

Step-by-step explanation:

Consider the provided inequality.

[tex]6x - 8 > 4x + 26[/tex]

Subtract 4x to both the sides.

[tex]6x -4x- 8 > 4x-4x + 26[/tex]

[tex]2x- 8 > 26[/tex]

Add 8 to the both sides.

[tex]2x- 8+8 > 26+8[/tex]

[tex]2x > 34[/tex]

Divide both the sides by 2.

[tex]x > 17[/tex]

Hence, the solution for the inequality is x>17

Answer:

$11,340

Step-by-step explanation:

1 month: 630

18 months: 18×630=11,340

Anna pays a total of $11,340 in rent over the course of 18 months by multiplying her monthly rent of $630 by 18.

To find out how much rent Anna pays over the course of 18 months, we need to multiply her monthly rent by the number of months. Anna pays $630 each month, so over 18 months, she would pay:

$630 times 18 = $11,340.

Therefore, Anna pays a total of $11,340 in rent over the course of 18 months.

Answer:

y = -2x²

Step-by-step explanation:

The set of ordered pairs is:

(x₁, y₁) = (2, -8)

(x₂, y₂) = (3, -18)

(x₃, y₃) = (4, -32)

(x₄, y₄) = (5, -50)

First let's check if this is linear.  For even increments of x, Δy is:

Δy₂₁ = y₂ − y₁ = -18 − -8 = -10

Δy₃₂ = y₃ − y₂ = -32 − -18 = -14

Δy₄₃ = y₄ − y₃ = -50 − -32 = -18

Δy isn't constant, so this isn't linear.  However, the difference of the differences is constant:

Δy₃₂ − Δy₂₁ = -14 − -10 = -4

Δy₄₃ − Δy₃₂ = -18 − -14 = -4

So this is a quadratic.

y = ax² + bx + c

To find the coefficients of a, b, and c, we can either plug in three points from the set and solve the system of equations:

-8 = a(2)² + b(2) + c

-18 = a(3)² + b(3) + c

-32 = a(4)² + b(4) + c

Or, if it's simple, we can use a little trial and error.

-8 = -2 (2)²

-18 = -2 (3)²

-32 = -2 (4)²

So the function is:

y = -2x²

Answer:

[tex]x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}[/tex]

Step-by-step explanation:

Apply Distributive property:

[tex](x+7)(x-9)=25\\\\x^2-9x+7x-63=25[/tex]

Add like terms and then add 63 to both sides of the equation:

[tex]x^2-2x-63=25\\\\x^2-2x-63+63=25+63\\\\x^2-2x=88[/tex]

Pick the coefficient of the x term, divide it by 2 and square it:

[tex](\frac{2}{2})^2=1[/tex]

Add it to both sides of the equation:

[tex]x^2-2x+1=88+1[/tex]

Rewriting the left side as a squared binomial, we get:

[tex](x-1)^2=89[/tex]

Apply square root to both sides:

[tex]\sqrt{(x-1)^2}=\±\sqrt{89}\\\\x-1=\±\sqrt{89}[/tex]

And finally we need to add 1 to both sides of the equation. Then we get:

[tex]x-1+1=\±\sqrt{89}+1\\\\x=\±\sqrt{89}+1\\\\\\x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}[/tex]

Answer:

x-10

Step-by-step explanation:

we know that

(-x+10) subtracted from 0 is equal to

0 minus (-x+10)

so

0-(-x+10)=0+x-10

=x-10

Answer:

x-10

Step-by-step explanation:

[tex]\bf 2x^2+10x+12\implies 2(x^2+5x+6)\implies 2(x+3)(x+2)[/tex]

recall that 3 * 2 = 6, and 3x + 2x = 5x.

Answer:

Step-by-step explanation:

It is a little easier if you take out the two.

2*(x^2 + 5x +6)

The numbers that multiply to 6 and adds to 5 are 3 and 2

2*(x + 3)(x + 2)

So that's how the trinomial factors.

Answer:x^1/2

Step-by-step explanation:

x^1/6*3=

x^3/6=

x^1/2

Answer:

Step-by-step explanation:

From the picture we have:

4w = 3l

If w = 12 ft, then

3l = 4(12)

3l = 48             divide both sides by 3

l = 16 ft

The dimensions of rectangular floor are 4w × (l + w).

Substitute the values of w and l:

4w = 4(12) = 48 ft

l + w = 16 + 12 = 28 ft

The formula of an area of a rectangle:

A = width × length

Substitute:

A = (48)(28) = 1344 ft²

Answer:

20 students

Step-by-step explanation:

It says 80% of 25 students got 83%+.

This means the number of students that got 83%+ is 80% of 25, or 25*0.8.

25*0.8 is 20, so 20 students got 83%+.

Answer:

20 students earned 83% or better in last maths test.

Step-by-step explanation:

We are given that on Ms. Smith's last math test, 80% of her 25 students earned an 83% or better.

We are to find the number of students who earned 83% or better on the test.

Number of students who earned 83% or more = 80% × 25 = [tex] \frac { 8 0 }{ 1 0 0 } \times 2 5[/tex] = 20

Answer:

3x-14xy+13y+4

Step-by-step explanation:

3x – 10xy + 13y – 4xy + 2x2

= 3x-14xy+13y+4

Simplification of the expression  [tex]3x - 10xy + 13y - 4xy + 2x^{2}[/tex]  is  [tex]3x - 14xy + 13y + 2x^{2}[/tex] .

Given expression is  [tex]3x - 10xy + 13y - 4xy + 2x^{2}[/tex]

Grouping the like terms from the expression, results -

= [tex]3x - (10xy - 4xy) + 13y + 2x^{2}[/tex]

Simplification of the expression is -

= [tex]3x - 14xy + 13y + 2x^{2}[/tex]

Thus, simplification of the expression  [tex]3x - 10xy + 13y - 4xy + 2x^{2}[/tex]  is  [tex]3x - 14xy + 13y + 2x^{2}[/tex] .

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Answer:

Step-by-step explanation:

The pulling force

Answer:

F = -52.8 N

Step-by-step explanation:

Given :

Inclination angle : 25°

Weight, W = 400 lb

The force N will push the box against the ramp.

Therefore, Force F will prevent the box from sliding down the ramp.

F = W sin 25°

  = 400 x (-0.132)

  = -52.8 N ( negative sign shows that the force applied in the opposite direction )

Answer:

[tex]\large\boxed{y\leq8\to\{y\ |\ y\leq8\}\to y\in(-\infty,\ 8]}[/tex]

Step-by-step explanation:

[tex]-1+4y\leq31\qquad\text{add 1 to both sides}\\\\-1+1+4y\leq31+1\\\\4y\leq32\qquad\text{divide both sides by 4}\\\\\dfrac{4y}{4}\leq\dfrac{32}{4}\\\\y\leq8[/tex]

Answer:

The graph in the attached figure

Step-by-step explanation:

we have

[tex]g\left(x\right)=\left|x+4\right|+2[/tex]

The vertex of the function is the point (-4,2)

The y-intercepts is the point (0,6)

using a graphing tool

see the attached figure

Answer:

It is the second graph

Look at the picture that's attached to that is the answer

Answer:  The required product is [tex]4x^5\sqrt[3]{3x}[/tex]

Step-by-step explanation:  We are given to find the following product :

[tex]P=\sqrt[3]{16x^7}\times \sqrt[3]{12x^9}.[/tex]

We will be using the following property of exponents :

[tex](i)~\sqrt[b]{x^a}=x^\frac{a}{b}\\\\(ii)~x^a\times x^b=x^{a+b}\\\\(iii)~x^a\times y^a=(xy)^a.[/tex]

The required multiplication is as follows :

[tex]P\\\\=\sqrt[3]{16x^7}\times \sqrt[3]{12x^9}\\\\=(16x^7)^\frac{1}{3}\times (12x^9)^\frac{1}{3}\\\\=(16\times12\times x^{7+9})^\frac{1}{3}\\\\=(192x^{16})^\frac{1}{3}\\\\=192^\frac{1}{3}x^\frac{16}{3}\\\\=(64\times3)^\frac{1}{3}x^\frac{16}{3}\\\\=4^{3\times\frac{1}{3}}3^\frac{1}{3}x^{5+\frac{1}{3}}\\\\=4\times 3^\frac{1}{3}x^5\times x^\frac{1}{3}\\\\=4x^5\sqrt[3]{3x}.[/tex]

Thus, the required product is [tex]4x^5\sqrt[3]{3x}.[/tex]