Please help find the SURFACE AREA . Be geniune no links will mark Es brainlieèst

Answer:

A = 139.5 cm^2

Step-by-step explanation:

Ok, let's break it down into pieces. First let's find the area of the main rectangle. We know that the area of a rectangle is as follows:

A = L x W

A = 9 x 12

A = 108 cm^2

Now we need to find the area of the two triangles. There are two ways to approach this. If you can visualize that you can flip the first triangle and slide it against the second, it becomes a rectangle. Then you can simply use the same formula as before with modified numbers.

L = 7 (height of the triangle

W = 4.5 (base of the triangle (half of 9))

A (both triangles) = 7 x 4.5

A (both triangles) = 31.5 cm^2

If you can't quite figure out how to visualize that, you can simply treat them as two independent right triangles. The formula for the area of a right triangle is as follows:

A = (1/2)b x h

b = 4.5

h = 7

A (first triangle) = (1/2)4.5 x 7

A (first triangle) = 15.75 cm^2

The area of the second triangle is identical

A (second triangle) = 15.75 cm^2

The area of the two triangles added together is

A (both triangles) = A (first triangle) + A (second triangle)

A (both triangles) = 31.5 cm^2

As you can see we got the same answer both ways. Now we just have to add the area of the two triangles to the area of the rectangle

A = 108 + 31.5

A = 139.5 cm^2

Answer:

the radius of the cylinder is 1.91 cm

Step-by-step explanation:

Given;

curved area of the cylinder, A = 24 cm²

height of the cylinder, h = 2.0 cm

The curved surface area of a cylinder is given as follows;

Curved surface area = 2πrh

where;

r is the radius of the cylinder

24 = 2πrh

r = 24 / (2πh)

r = 24 / (2π x 2)

r = 24 / (4π)

r = 1.91 cm

Therefore, the radius of the cylinder is 1.91 cm

Answer:

Choice B

y = -450x +18,000

Step-by-step explanation:

18,000 = b

descent rate = 450 = m

x = minutes

Answer:

-1.52

Step-by-step explanation:

-2+0.48=-1.52

Answer:

y = -4x + 15

Step-by-step explanation:

y +1 = -4x(-4)

y +1 = -4x +16

y = -4x +15

Answer:

y = -4 + 15

Hope that this helps!

Answer:

A

Step-by-step explanation:

The theorem we use for this is

[tex]a(a + b) = c(c + d)[/tex]

Solve for d.

[tex]a(a + b) = c { }^{2} + cd[/tex]

[tex]a(a + b) - {c}^{2} [/tex]

[tex] \frac{a(a + b) - {c}^{2} }{c} [/tex]

A is the answer

Answer:

11,7,5,3

Step-by-step explanation:

thats all thank you

Answer: To convert a number into percent multiple it by 100 and then add the percent sign. These examples convert the numbers 23 and 158 to percents. To convert a number with a decimal into percent, multiply it by 100 and add the percent sign. These examples convert 0.4580; 0.0257; and 0.00458.

Hope this help

Step-by-step explanation:

Answer:

English and French:40 and English:10

Step-by-step explanation:

English and French:4÷5×50

=40

English:1÷10×50

=10

Answer:

thats cool

Step-by-step explanation:

Corresponding angles on parallel lines cut by a transversal are equal

5x + 30 = 3x + 60

Subtract 3x from both sides

2x + 30 = 60

Subtract 30 from both sides

2x = 30

Divide both sides by 2

X = 15

Answer:

1. 48

2. 45

3. 32

4. B

Step-by-step explanation: Hope this help :D

Answer:

x < 19

Step-by-step explanation:

Given that,

An inequality 2x - 5 < 33.

LHS of the inequality is 2x - 5

RHS of the inequality is 33

LHS < RHS

i.e.

2x - 5 < 33

Add 5 to both sides of the inequality

2x - 5 +5 < 33+5

2x < 38

Divide both sides by 2.

x < 19

So, the value of x is less than 19.

Answer:

90

Step-by-step explanation:

the movie was 25% shorter

25% of 120 is 30

120-30=90

Step-by-step explanation:

ratio 6:8

376+336=712

6+8=14

712/14=50.86

haircut= 50.86*6=305.16

colour= 50.86*8=406.88

i hope this helps

Answer:

Step-by-step explanation:

Let the smallest number = x

The next number will be x + 1

x + x + 1 = 5

2x + 1 = 5          This is likely the answer to the question although it could be the equation above.

Answer: [tex]792\ m^2[/tex]

Step-by-step explanation:

Given

The length of the rectangular prism is [tex]l=12\ m[/tex]

width of the rectangular prism is [tex]w=8\ m[/tex]

height of the rectangular prism is [tex]h=15\ m[/tex]

The surface area of the rectangular prism is [tex]2[wl+lh+hw][/tex]

Put the values

[tex]\Rightarrow 2[8\times 12+15\times 12+15\times 8]\\\Rightarrow 2[96+180+120]=2\times 396\\\Rightarrow 792\ m^2[/tex]

The surface area of the rectangular prism is [tex]792\ m^2[/tex]

Answer:

Option C. The graph has an oblique asymptote

Step-by-step explanation:

hope it helps...

have a great day

Answer:

C

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

As you can see from the image attached below, the equation that is being graphed is

F(x) = [tex]\frac{x}{(x+4)(x-1)}[/tex]

This equation splits off into various directions because the denominator is turns into a quadratic equation. Once solved it provides two values for which the quadratic equation would equal zero. Since this equation is the denominator 0 would give a null value and is why on the graph there is no y value for 1 or -4. Yet all other values are valid and have an different y output.

Answer:

$270

Step-by-step explanation:

35%= 0.35

200*0.35 =70

He saves $70 more.

Altogether saves $270

Answer:

Well I guess this is a math problem but the middle time would be: 6 hours and 30 minutes.

Step-by-step explanation:

Adding 6 hours to 2 pm makes 8:00 on the dot at night. Adding 30 minutes to 8:00 would be 8:30. There you have your answer.

Step-by-step explanation:

x'=53

σ=16

n=144

a) hypothesis

H0:µ=55

Ha:µ<55

This is a left tailed test

b) Test statistics

=(53-55)/(16/sqrt{144})

=-1.5

c)Pvalue at z=|-1.5|

pvalue= p(z>1.5)

=1-0.933193

=0.066807

=0.0668

Decision

since pvalue>alpha(0.05) fail to reject the null hypotheis.

Conclusion

There is not sufficient evidence to support the claim the new computer program has not reduce the time to retrieve the data.

d)since Pvalue>alpha(0.025),so fail to reject the null hypothesis.

No, change in conclusion.  

Answer:

the leg is 6.9

Step-by-step explanation:

use the reverse Pythagorean therm

find the square root of 8(squared) - 4(squared) =6.9

Answer:

a) The golf ball reaches a height of 64 feet.

b) The golf ball will take 2 seconds to reach maximum height.

c) The golf ball will take 4 seconds to land after being hit.

d) The golf ball will be 48 feet above ground 1 and 3 seconds after being hit.

Step-by-step explanation:

a) The parabolic motion of the golf ball is described by a second order polynomial, that is, the equation of the parabola. To determine the maximum height of the golf ball, we need to transform the equation of the parabola given into vertex form:

[tex]h = -16\cdot (t^{2}-4\cdot t)[/tex]

[tex]h - 64 = -16\cdot (t^{2}-4\cdot t + 4)[/tex]

[tex]h - 64 = -16\cdot (t-2)^{2}[/tex]

From this form we can obtain relevant information of the maximum height of the golf ball, contained in the left side of the equation. On this approach, we conclude that the golf ball reaches a height of 64 feet.

b) The time taken by the golf ball is contained in the right side of the formula. That is, the golf ball will take 2 seconds to reach maximum height.

c) In this case, we need to factor the polynomial to find right times, that is:

[tex]h = 64\cdot t - 16\cdot t^{2}[/tex]

[tex]h = 16\cdot t \cdot (4 - t)[/tex]

The time taken by the golf ball to land is contained in the second binomial. In a nutshell, the golf ball will take 4 seconds to land after being hit.

d) If we know that [tex]h = 48[/tex], the time taken by the golf ball to be 48 feet above the ground is:

[tex]64\cdot t - 16\cdot t^{2} = 48[/tex]

[tex]16\cdot t^{2}-64\cdot t +48 = 0[/tex]

By Quadratic Formula, we have the following roots:

[tex]t_{1} = 3[/tex], [tex]t_{1} = 1[/tex]

The golf ball will be 48 feet above ground 1 and 3 seconds after being hit.

Answer:

119

Step-by-step explanation:

14x17 = 238)/2

Use Heron's formula.

A = sqrt{(s - a)*s - b)(s - c)}, where a, b, and c represent the sides of the triangle.

We need to find s first.

So, s = (a + b + c)/2.

s = (13 + 6 + 9)/2

s = 28/2

s = 14

We now plug everything into the Heron's area formula.

A = sqrt{(14 - 13)(14 - 9)(14 -6)}

A = sqrt{(1)(5)(8)}

A = sqrt{40}

A = 6.3245553203

Let us now round to one decimal place as instructed. We round to the tenths place, in other words.

A = 6.3 cm^2

Did you follow?

Answer:

x = 63.43...

Step-by-step explanation:

Ok, so the angle x is the same measure as the bottom right angle of the triangle because the bottom of the triangle and the dashed line are parallel. Knowing this we can simply solve for the bottom right angle and it will be the same as angle x.

To do this we can set up and equation with tangent because we are working with the opposite and adjacent sides of the triangle.

[tex]Tan(x) = \frac{opposite}{adjacent} = \frac{50}{25} = 2[/tex]

[tex]Tan(x)=2\\[/tex]

Now to isolate the variable, we can simply use the cotangent or inverse tangent.

[tex]Tan^{-1}(Tan(x)) = Tan^{-1}(2)\\x = Tan^{-1}(2)\\x = 63.43...[/tex]