Please helpppppppppppp

Answer:

find its height and curved surface area​

Step-by-step explanation:

Answer:

-3

Step-by-step explanation:

8+-3+-8 = 8-3-8=5-8=-3

Answer:

\(-3\)

Step-by-step explanation:

We´ll Follow the PEMDAS order of operations:

_____________________________

\(8+\left(-3\right)+\left(-8\right)\)

\(\longmapsto\) \(+\left(-3\right)=-3\)

\(\longmapsto\) \(8-3+\left(-8\right)\)

\(\longmapsto\) \(8-3=5\)

\(\longmapsto\) \(+\left(-8\right)=-8\)

\(\longmapsto\) \(5-8\)

\(\longmapsto\) \(5-8=-3\)

__________________________

Answer:

12x^2 -21x -6

Step-by-step explanation:

(3x-6)(4x+1)

FOIL

first 3x*4x= 12x^2

outer 3x*1 = 3x

inner -6*4x = -24x

last  -6*1 = -6

Add them together

12x^2 +3x -24x -6

Combine like terms

12x^2 -21x -6

Answer:

(12. 21)

Step-by-step explanation:

Given the coordinate (5, 9), if it is dilated by a factor of 2, the resulting coordinate will be expressed as;

P = 2(5, 9)

P = (2(5), 2(9))

P = (10, 18)

If it is now translated 3 up and 2 right, then the final coordinate will be at;

P' = (10+2, 18+3)

P' = (12, 21)

Hence the final image will be at (12. 21)

Answer:

y=1

Step-by-step explanation:

3x+y=7

x=2y

3(2y) + y=7

6y+y=7

7y=7

÷ 7

y=1

Answer:

3x+y=7

X=2y

collecting like terms:

3x+y=7

x-2y=0

eliminate like terms:

(first multiple both equations with 0 and 3)

(3x+y=7)0

(x-2y=0)3

The result is as follows:

3x+y=7

3x-6y=0

5y=7

devide by 5

y=1.4

then we solve for X now cause we know the value of y

3x+1.4=7

let's collect like term

3x=7-1.4

3x=5.6

devide by 3 both sides

X= 1.87

3(1.87)+1.4=7

Answer:

3) a=0

Step-by-step explanation:

Distribute 7 through the parenthesis (2a-1) -> 14a-7-3= 10a-10-4a

Combine like terms -> 14a-7-3= 6a-10

Calculate the difference -> 14a-10=6a-10

Cancel out equal terms on both sides -> 14a=6a

Move 6a to the left -> 14a-6a=0

Combine like terms -> 8a=0

Divide both sides -> a=0

If you need help on the other ones lmk

Answer:

Step-by-step explanation:

In the given large pizza

diameter (d) = 24 in

Now

Circumference

= π* d

= 3.14 * 24

= 75.36 in

Hope it helps :)

Answer:

3 and 2

Step-by-step explanation:

complementary means they add up to 90 degrees. Angle 3 and 2 equal 90 degrees,

Answer:

153

Step-by-step explanation:

if im correct plz mark me brainliest!

Answer:

10 shelves

Step-by-step explanation:

out of the other choices, 10 is most suitable to divide with 80

To prove the continuity of a function, we need to show that it satisfies the definition of continuity.

1. Proving the continuity of the function f(x) = x:

  Let's consider a point a in the domain of f, which is R (the set of all real numbers). We want to show that f(x) = x is continuous at the point a. According to the definition of continuity, for every ε > 0, there exists a δ > 0 such that if |x - a| < δ, then |f(x) - f(a)| < ε.

Now, consider |x - a| < δ. We can rewrite this as |x - a| < ε since ε > 0 implies δ > 0.

Using the function f(x) = x, we have |f(x) - f(a)| = |x - a|.

Since |x - a| < ε, it follows that |f(x) - f(a)| < ε.

Therefore, the function f(x) = x is continuous for all x in R.

2. Proving the continuity of the function f(x1, x2, ..., xk) = ∑(ki=1) xi:

  Let's consider a point (a1, a2, ..., ak) in the domain of f, which is Rk (the k-dimensional Euclidean space). We want to show that f(x1, x2, ..., xk) = ∑(ki=1) xi is continuous at the point (a1, a2, ..., ak).

According to the definition of continuity, for every ε > 0, there exists a δ > 0 such that if |x1 - a1| < δ, |x2 - a2| < δ, ..., and |xk - ak| < δ, then |f(x1, x2, ..., xk) - f(a1, a2, ..., ak)| < ε.

Now, consider |xi - ai| < δ for i = 1, 2, ..., k. We can rewrite this as |xi - ai| < ε/k since ε > 0 implies δ > 0.

Using the function f(x1, x2, ..., xk) = ∑(ki=1) xi, we have |f(x1, x2, ..., xk) - f(a1, a2, ..., ak)| = |∑(ki=1) (xi - ai)|.

 By the triangle inequality, we have |∑(ki=1) (xi - ai)| ≤ ∑(ki=1) |xi - ai|.

 Since |xi - ai| < ε/k for all i = 1, 2, ..., k, it follows that ∑(ki=1) |xi - ai| < k * (ε/k) = ε.

Therefore, |f(x1, x2, ..., xk) - f(a1, a2, ..., ak)| < ε.

  Hence, the function f(x1, x2, ..., xk) = ∑(ki=1) xi is continuous for all (x1, x2, ..., xk) in Rk.

Therefore, both functions f(x) = x and f(x1, x2, ..., xk) = ∑(ki=1) xi are continuous.

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The number of burnt acres that corresponds to the 38th percentile is approximately 3,975 acres.

To find the number of burnt acres that corresponds to the 38th percentile, we need to use the standard normal distribution. We first convert the original distribution to a standard normal distribution by subtracting the mean and dividing by the standard deviation:

where z is the standard score, x is the number of burnt acres, μ is the mean (4,300 acres), and σ is the standard deviation (750 acres).

Next, we find the z-score corresponding to the 38th percentile using a standard normal distribution table or calculator. The z-score corresponding to the 38th percentile is approximately -0.26.

Finally, we solve for x by rearranging the equation for z:

Therefore, the number of burnt acres that corresponds to the 38th percentile is approximately 3,975 acres.

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The inequality is represented by the equation

D. (2, 5) is the solution of the inequality

The given points are (0, 0.75) and (2, 4.75) these is used to calculated the slope

m = (y - y') / (x - x')

m = (4.75 - 0.75) / (2 - 0)

m = 4 / 2 = 2

using the point slope formula which is

(y - 4.75) = 2 (x - 2)

y - 4.75= 2x - 4

y = 2x + 0.75

y = 2x + 3/4

dashed straight line with positive slope goes and Everything to the left of the line is shaded means greater than >

y < 2x + (3/4)

Watching the graph the solution is D(2, 5) this point is in the shaded area

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Answer:

$39.55

Step-by-step explanation:

$7.50 times 5= $37.55+$2=$39.55

Answer:

$39.55

Step-by-step explanation:

The probability that exactly 7 of them are 16 to 24 years old is 0.222

In this question we have been given a recent study of minimum wage earners found that 55% of them are 16 to 24 years old.

A random sample of 12 minimum wage earners is selected. we need to find the probability that exactly 7 of them are 16 to 24 years old.

Here, n = 12

p = 0.55

1 - p = 0.45

x = 7

Using binomial distrubution the required probability would be,

P = 12C7 * (0.55)^7 * (0.45)^(12 - 7)

P = 792 * 0.01522 * (0.45)^5

P = 792 * 0.01522 * 0.01845

P = 0.2224

Therefore, the required probability is 0.222

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The formula you have given (SS₁ + SS₂) / (n₁+ n₂) is actually the formula for the unweighted average of the variances, which is not appropriate when the sample sizes and variances are different between the two samples.

The formula for pooled variance is:

pooled variance = (SS₁+ SS₂) / (df₁ + df₂)

where SS₁ and SS₂ are the sum of squares for the two samples, df₁ and df₂ are the corresponding degrees of freedom, and the pooled variance is the weighted average of the variances of the two samples, where the weights are proportional to their degrees of freedom.

Note that the denominator is df₁ + df₂ not n₁+ n₂. The degrees of freedom take into account the sample sizes as well as the number of parameters estimated in

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The speed of wind is 380 miles per hour.

What is speed?

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is traveling along a path.

Here, we have

The plane has a cruising speed of 200 miles per hour when there is no wind. at this speed, the plane flew 500 miles with the wind in the same amount of time it flew 300 miles against the wind.

We have to find the speed of the wind.

Time = Distance/speed

Time = 500/200 = 2.5hrs

When the plane moves against the wind its effective speed reduces as it has to overcome the opposing force of the wind since it is given that it cover's a distance of 300 miles at the same time we can write

2.5 = 300/ V(plane) - v(wind)

2.5 = 300/500- v(wind)

v(wind) =380mph

Hence, the speed of the wind is 380mph.

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Answer:

mean for the the second median for the 1st one

Step-by-step explanation:

Answer:

B is the answer

Step-by-step explanation:

Distribute and Combine Like Terms

Step-by-step explanation:

3(7/5x + 4)-2(3/2-5/4x)

21/5x + 12 - 3 + 5/2*

21/5x + 5/2 + 12 - 3

67/10x + 9

the correct answer is b

The 33rd term of the given Arithmetic progression will be -132.

What is an Arithmetic progression?

A series of numbers is called a "arithmetic progression" (AP) when any two subsequent numbers have a constant difference. Arithmetic Sequence is another name for it.

Given, first term= a1= 28

and, a93 = -432

we know that, a93 = -432

                   a + 92d = -432 (where d is the common difference)

                  28 + 92d = -432

                     92d = -432-28

                             = -460

                       d = -460/92 = -5.

Now, we can find the a33,

               a33 = a + 32d

                       = 28 + (32× -5)

                       = 28-160

                       = -132.

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f(x)=x²−4x−21

The degree is the biggest power of x.  That's a polynomial of degree 2, also called a quadratic function.  Let's find its zeros.

0 = x²−4x−21 = (x - 7)(x+3)

x=7 or x=-3

The fundamental theorem guarantees every non-constant polynomial with complex coefficients has a complex zero, let's call it r.  If we divide the polynomial by x-r there won't be any remainder and we'll get a new polynomial, one degree less.  The fundamental theorem again applies and (if it's not a constant polynomial) we are assured of another zero, s.  We divide by x-s and get a new polynomial of degree one less.  We repeat all this until we get a constant polynomial (degree zero).    So we get a zero for every degree. They're not necessarily all different.

Answer:

The degree of f(x) is 2. The Fundamental Theorem of Algebra guarantees that a polynomial equation has the same number of complex roots as its degree. This means that f(x) has exactly 2 zeros. Those zeros are 7 and -3.

The simplest form of the radical expression 72x^5y^4 is 6x^2y^2√(2xy).

To simplify the radical expression 72x^5y^4, we can break it down into its prime factors and simplify the square root separately for each factor.

First, let's break down 72, x^5, and y^4 into their prime factors:

72 = 2 * 2 * 2 * 3 * 3

x^5 = x * x * x * x * x

y^4 = y * y * y * y

Now, we can simplify the square root:

√(72x^5y^4) = √(2 * 2 * 2 * 3 * 3 * x * x * x * x * x * y * y * y * y)

Taking out pairs of identical factors from under the square root, we get:

√(2 * 2 * 3 * 3 * x * x * x * x * x * y * y * y * y) = 2 * 3 * x^2 * y^2 * √(2xy)

So, the simplest form of the radical expression 72x^5y^4 is 6x^2y^2√(2xy).

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Answer:The answer is C.

Step-by-step explanation:

Answer:

One solution

Step-by-step explanation:

4(x-5)=3+7

Combine like terms

4(x-5) = 10

Distribute

4x - 20 = 10

Add 20 to each side

4x-20 +20 = 10+20

4x = 30

Divide by 4

4x/ 4= 30/4

x = 40/4

x =15/2

Answer:

$10278

Step-by-step explanation:

Given data

P= $6000

R= 8%

T= 7 years

The compound interest formula is

A=P(1+r)^t

substitute

A=6000(1+0.08)^7

A=6000(1.08)^7

A=6000*1.713

A=$10278

There are 69300 possible ways of selecting six bottles randomly with two bottles of each variety.

Probability is a branch of mathematics concerned with numerical descriptions of how likely an event is to occur or how likely a statement is to be true. In the given question, we have to select 6 bottles randomly with two bottles of each variety,

= ¹⁰C₂× ⁸C₂ × ¹¹C₂

¹⁰C₂= [1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 × 9 × 10] / [(1 × 2)(1 × 2 × 3 × 4 × 5 × 6 × 7 × 8)]

= 90/2

= 45

Similarly,  ⁸C₂  = 28

In the same way ¹¹C₂= 55

= ¹⁰C₂× ⁸C₂× ¹¹C₂

= 45 × 28 × 55

= 69300

Therefore, there are 69300 possible ways of selecting 6 bottles with two bottles of each variety.

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Answer:

radius=6

Step-by-step explanation:

Answer:

x=1

Step-by-step explanation:

8+2x-7x=5(x-3)-2(6x-8)

8+2x+7x=5x-15-12x+16

8+15-16=5x-12x-3x-7x

23-16=-7x-3x-7x

17=-17x

x=1

Answer:

Today: Thursday, 05 November 2020

Hour: 17.33 WIB (Indonesia)

_______________________________

After 35 minutes there will be 40 bacteria remaining.

The process of a constant percentage rate decrease in an amount over time is referred to as "exponential decay." The formula to calculate exponential decay is given as, \(N_t=N_0\left(\frac{1}{2}\right)^{\frac{t}{t_{1/2}}}\). Here, Nt is the quantity after time t, N0 is the initial quantity, t1/2 is the half-life, and t is time.

For the first situation, Nt=360, N0=900, t=10 minutes. Therefore, substituting the given values get the value of t1/2. So,

\(\begin{aligned}360&=900\left(\frac{1}{2}\right)^{\frac{10}{t_{1/2}}} \\\frac{360}{900}&=\left(\frac{1}{2}\right)^{\frac{10}{t_{1/2}}}\\0.4&=\left(\frac{1}{2}\right)^{\frac{10}{t_{1/2}}}\\ \ln(0.4)&=\frac{10}{t_{1/2}}\ln(0.5)\\t_{1/2}&=10\times\frac{\ln(0.5)}{\ln(0.4)}\\&=7.6\end{aligned}\)

Now, for the second situation,  Nt=40.  We have to find the time at which there will be 40 bacteria remaining. Then,

\(\begin{aligned}40&=900\left(\frac{1}{2}\right)^{t/7.6}\\0.04&=\left(\frac{1}{2}\right)^{t/7.6}\\\ln(0.04)&=\frac{t}{7.6}\ln(0.5)\\t&=7.6\times\frac{\ln(0.04)}{\ln(0.5)}\\&=7.6\times4.64\\&=35.26\\&\approx35\end{aligned}\)

The answer is 35 minutes.

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