I need help with surface area

Answer:

27.16

Step-by-step explanation:

Answer:

25.92

Step-by-step explanation:

Answer:

(-7,8), (2,1),(-8, -9), (-8,6)

Step-by-step explanation:

the x values repeat

The x values are not supposed to repeat to create a function

The relative velocity of one plane with respect to the other plane is given

by the sum of the velocity of the two planes.

Reasons:

The distance between the two airports = 2,400 km

Speed of the plane from NAIA = 800 kilometer per hour

Speed of the plane coming from SIN = 640 kilometers per hour

Let t represent the time after which the two planes meet, we have;

800 × t + 640 × t = 2,400

[tex]\displaystyle t = \frac{2,400 \ km}{800 \ km/hr + 640 \ km/hr} = \frac{5}{3} \ km/hr = 1.\overline 6 \ km/hr[/tex]

The time after which the two planes meet, t = [tex]\underline{1. \overline 6 \ km/hr}[/tex]

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Answer:

y= -6x - 51

Step-by-step explanation:

5y = -6x - 10

Slope: -6

y = -6/5x - 2

Point: (-10,9)

y-intercept: 9 - (-6)(-10) = 9 -60 = - 51

Answer:

y = 20 degrees.

Step-by-step explanation:

Both base angles are 25 degrees so 5x = 25 giving x = 5.

3y + 70 = 180 - 2(25) = 130

3y = 130 - 70 = 60

y = 60/3 = 20.

Answer:

15 times

Step-by-step explanation:

Using the formula for the margin of error, it is found that Haley should sample 12,724 soldiers.

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the z-score that has a p-value of [tex]\frac{1+\alpha}{2}[/tex].

The margin of error is of:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

Estimate of the proportion of 64%, hence [tex]\pi = 0.64[/tex].

94% confidence level

So [tex]\alpha = 0.94[/tex], z is the value of Z that has a p-value of [tex]\frac{1+0.94}{2} = 0.97[/tex], so [tex]z = 1.88[/tex].  

Margin of error of less than 0.008 is wanted, hence, we have to find n when M = 0.008.

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.008 = 1.88\sqrt{\frac{0.64(0.36)}{n}}[/tex]

[tex]0.008\sqrt{n} = 1.88\sqrt{0.64(0.36)}[/tex]

[tex]\sqrt{n} = \frac{1.88\sqrt{0.64(0.36)}}{0.008}[/tex]

[tex](\sqrt{n})^2 = (\frac{1.88\sqrt{0.64(0.36)}}{0.008})^2[/tex]

[tex]n = 12723.84[/tex]

Rounding up, Haley should sample 12,724 soldiers.

A similar problem is given at https://brainly.com/question/25404151

Answer:

No

Step-by-step explanation:

1/4=0.25

5/16 does not equal 0.25

Answer:

why?

Step-by-step explanation:

Answer:thank

have a great day

Answer:

A,B,C,D

Step-by-step explanation:

Answer:

Sorry This Is Late

The Answer Is "g(x)= 3^(x+1)-2"

Step-by-step explanation:

I Just Took The Test :)

Consider the cubic equation,

x³ - x² = 9 (x - 1)

We can solve this by factoring:

x³ - x² - 9x + 9 = 0

x² (x - 1) - 9 (x - 1) = 0

(x² - 9) (x - 1) = 0

(x - 3) (x + 3) (x - 1) = 0

So the cubic has roots at x = 3, x = -3, and x = 1. Split the real line into the open intervals (-∞, -3), (-3, 1), (1, 3), and (3, ∞). Check if the inequality holds for some test point taken from each interval:

• in (-∞, -3), take x = -4. Then

(-4)³ - (-4)² = -80

9 (-4 - 1) = -45

but -80 > -45 is not true. So this interval is not in the solution set.

• in (-3, -1), take x = -2. Then

(-2)³ - (-2)² = -12

9 (-2 - 1) = -27

and -12 > -27 is true. So x in (-3, -1) satisfies the inequality.

• in (1, 3), take x = 2. Then

2³ - 2² = 4

9 (2 - 1) = 9

but 4 > 9 is not true.

• in (3, ∞), take x = 4. Then

4³ - 4² = 48

9 (4 - 1) = 27

and 48 > 27 is true.

So, the complete solution set is

(-3, -1) U (3, ∞)

(where U denotes union)

Answer:

The ramp is changing over time

It affects its accelaration because its going at different speeds

Thats all i can help you with now

Step-by-step explanation:

Answer:

A.

B. (if the black block represents a multiplication sign)

D.

Step-by-step explanation:

We have the expression "Nine more than the product of 5 times the number of tires t". Let's focus on nine more to cross out some answers, "nine more than the" indicates that there must be a certain operation to happen first before 9 is added onto it. So cross out the answers that do not have this property. C and E.

Leaving us with the only last three answers that represent it. (If B. is a multiplication sign)

Answer:

Step-by-step explanation:

b

The exterior angle of a triangle is equal to the sum of 2 opposite interior angles of the triangle.

Here,

2 opp. interior angles = 30° & (4x + 2)°

Exterior angle = (8 + 6x)°

So,

8 + 6x = 4x + 2 + 30

8 + 6x = 4x + 32

8 - 32 = 4x - 6x

-24 = -2x

=》 12 = x

________

꧁✿ ᴿᴬᴵᴺᴮᴼᵂˢᴬᴸᵀ2222 ✬꧂

$6,055.73

Step-by-step equation:

THE MAIN FORMULA:

           initial amount (rate)^the amount of times it is occuring

Step #1, we need to break up the problem for the information:

Tia invests $2,500 at an interest rate of 4%, compounded quarterly,  

and another $2,500 at an interest  rate of 3.75%, compounded  annually. How much are the  investments worth at the end of  5 years ?

Step #2, find out how much the first account has in 5 years:

so we know that the rate is 4% quarterly and a quarter is 4. You have to divide 4% (.04 in decimal form) and 4 to get how much the rate is every quarter. That would be .01. After finding how much it is quarterly you would need to add 1. because it is increasing and not decreasing.

For the 20, you would need to multiply 5 and 4. 5 is the amount of years and the 4 is how many times it is happening in that 1 year.

                                              2,500 (1.01)^20

Step #3, find out how much the second account has in 5 years:

we do the exact same steps like we did to find her first account but with different numbers.The number 20 is 5 because it only says for the second account "compounded annually" and annually means oncea year so you would have to mulitiply 5 by 1 and it would get you 5.

To find the rate, we would need to add 1 instead of subtracting one because the problem is and not decreasing. So it would be 3.75% (.0375 in decimal form) plus 1. and it would get you 1.0375.

                                            2,500 (1.0375)^5

The last step is adding the answers to both of those equations together to get the amount of money that she invested:

                              3005.25 + 3050.48= $6055.73

Answer:

y = 2x² + 8x + 8

Step-by-step explanation:

x = t - 2 → t = x + 2

y = 2t²

Substitution:

y = 2(x + 2)²

y = 2(x² + 4x + 4)

y = 2x² + 8x + 8

Answer:

  (x, y) = (1, -6)

Step-by-step explanation:

The expression for y given by the first equation can be substituted into the second equation.

  11x +(-8x +2) = 5 . . . substitute for y

  3x +2 = 5 . . . . . . . simplify

  3x = 3 . . . . . . . . . subtract 2

  x = 1 . . . . . . . . . divide by 3

  y = -8×1 +2 = -6 . . . . use the first equation to find y

The solution is (x, y) = (1, -6).

Answer:

1/2 3/6 4/8 and 5/10 because all are equivalent to 2/4

Answer:  y = 7x

Step-by-step explanation:

The slope-intercept is usually written as y = mx + b form, where m is the slope, and b is the y-intercept. The y-intercept is the y value when x is equal to 0.

In this case, the y-intercept is 0.

Slope = (y2 - y1) / (x2 - x1)  

           = (7 - 0) / (1 - 0)

           = 7 / 1

           = 7

Plug in the slope and y-intercept, we get y = 7x + 0 = 7x

Answer:

answe are ,

1). (n+10)

2) (3n+4)

3). (7x -9)

4). (x+6)

5). (5x+2)

6). (x+10)

Answer:

Raju can read one chapter 16 minutes so in if you divide 64 by 16 you get 4 meaning he can read 4 chapters in 64 minutes.

b = -0.5

4 + 2 = - 0.5 * 4 + 8

6 = -2 + 8

6 = 6

Which is true, Therefore the answer is -0.5

For b = - 0.5 , y =4 is the solution of the equation  y + 2 = by + 8.

We have the following equation → y + 2 = by + 8.

We have to find the value of b for which y = 4 is a solution to the equation → y + 2 = by + 8.

The solution of a function f(x) is the value of x for which f(x) = 0.

According to the question, we have -

y + 2 = by + 8

y - by - 6 = 0

y(1 - b) - 6 = 0

y(1 - b) = 6

1 - b = 6/y

1 - 6/y = b

b + 6/y = 1

For y = 4 ->

b + 6/4 = 1

b + 1.5 = 1

b = - 0.5

Hence, for b = - 0.5 , y =4 is the solution of the equation  y + 2 = by + 8.

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Answer:

the correct answer is 9/28

Answer:

9/28

Step-by-step explanation:

I hope this helps!