Proofs!! can someone PLEASE HELP

Answer:

a=1, b= 7, c=0

Opens upward since a is positive(meaning it has a minimum vertex)

Y-int: (0,0)

Step-by-step explanation:

y=[tex]x^{2}[/tex]+7x

In order to find, the y-intercept, x has to be 0, so plug in 0 for x

y=[tex]0^{2}[/tex]+7(0)

y=0

So the y intercept: (0,0)

The equation form a parabola that opens up and the y intercept is at y = 0. a = 1, b = 7 and c = 0

A quadratic function is in the form:

y = ax² + bx + c

Given that:

y = x² + 7x, hence:

a = 1, b = 7 and c = 0

The equation form a parabola that opens up and the y intercept is at y = 0.

Find out more on quadratic function at: https://brainly.com/question/1214333

Find the area of the circle:

Area = PI x r^2

Area = 3.14 x 9^2

Area = 3.14 x 81

Area = 254.34 square cm

Now multiply the area of the circle by the shaded portion which is the fraction of the degree over 360 degrees:

254.34 x 80/360 = 20,347.2/360 = 56.52

The shaded area is 56.52 square cm.

Area of circle formula: A = πr²

A = π(9)²

A = 81π

A = 254.34cm²

The ratio of degrees in the shaded region to total degrees in a circle:

80/360 = 40/180 = 20/90 = 10/45 = 2/9

Multiply:

254.34/1 * 2/9

508.68/9

56.52

Therefore, the area of the shaded region is 56.52cm²

Best of Luck!

Answer:

To find the x-intercept of a given linear equation, plug in 0 for 'y' and solve for 'x'. To find the y-intercept, plug 0 in for 'x' and solve for 'y'.

Answer:

C

Step-by-step explanation:

A, B, and D don't make sense

Answer:

Library's Area= 5200

Courthouse' Area= 5027

Larry is correct.

Step-by-step explanation:

Answer:

V = 780 m3

Step-by-step explanation:

First, find the total distance between A and B.

3 + 21 = 24 units

Second, divide by 8.

24 / 8 = 3

Third, multiply by 3.

3 * 3 = 9

Therefore, the answer is 3.

Best of Luck!

Answer:

D 6

Step-by-step explanation:

First, we find the distance between points A and B.

AB = |a - b| = |-3 - 21| = |-24| = 24

The distance from A to B is 24.

Now we need 3/8 of that distance.

3/8 of 24 = 3/8 * 24 = 3/8 * 24/1 = 72/8 = 9

Point Q is 9 units to the right of point A.

-3 + 9 = 6

Answer: D 6

Answer:

4 m

Step-by-step explanation:

The volume of a cone is given by

V = 1/3 pi r^2 h

12 pi  = 1/3 pi  (3)^2 x

12 pi = 1/3 pi 9 x

12 pi = 3pi x

Divide each side by 3 pi

12 pi / 3pi = 3pix/ 3pi

4 =x

Answer:

x = -8

Step-by-step explanation:

3x + 2 = 2x - 6

Answer:x = -8

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

You read piece wise as

2 turns on at x = -5, then turns off at x = - 1 and so on

Answer:

0.555 in

Step-by-step explanation:

The first thing we must do is calculate the volume of the machine, the volume of a wait is:

v = (4/3) * pi * (r ^ 3)

we know that the diameter is twice the radius, therefore:

r = d / 2 = 20/2

r = 10, replacing:

v = (4/3) * 3.14 * (10 ^ 3)

v = 4186.66 in ^ 3

Now, we know that by leaving 40% of space in the machine there are 3,500 chewing gums, therefore, 60% of that volume is chewing gum.

4186.66 * 0.6 = 2512

to calculate the volume of a chewing gum:

3500 * v = 2512

v = 2512/3500

v = 0.7177 in ^ 2 is the volume of a single chewing gum

if we solve the sphere formula for r, we are left with:

r ^ 3 = v * (3/4) / pi

replacing

r ^ 3 = 0.7177 * (3/4) /3.14

r ^ 3 = 0.1714

r = 0.1714 ^ (1/3)

r = 0.555

the radius of each gum is 0.555 in

Answer:

B. 1.2, 1.234, 1.237, 1.48, 2.01

Step-by-step explanation:

Answer:

5.73 The closest answer is probably 6

Step-by-step explanation:

Answer: The radius is 5.73 CM so the answer is A, 6.

Step-by-step explanation: The radius is equal to one half the diameter

Pi times the diameter equals the circumfrence. so we do

36/3.14/2

Answer:

127

Step-by-step explanation:

Answer:

x= 127 degrees

Step-by-step explanation:

use the vertical angles theorem to say that x=90*+37*. So, x=127 degrees.

Answer:

I am pretty sure it is D.

Step-by-step explanation:

Town A is semetrical, meaning that if you fold it exactly in half it would match up. Town B. Is positively skewed, meaning that there is one or more point(s) to the right. (Negatively skewed means the same thing, but to the left instead of the right)

Answer: Sorry i whould help but I cant see it can you put it more bigger

Step-by-step explanation:

Answer:

(0,-21)

Step-by-step explanation:

The x value of a y intercept is always 0

So we can plug in 0 to the equation to solve for the y intercept

(2*0-3)(3*0+7)

-3*7= -21

y intercept: (0,-21)

Answer:

-21

Step-by-step explanation:

f(x)=(2x-3)(3x+7)

The y intercept is when x=0

f(0) = (0-3) (0+7)

     -3*7

    -21

The y intercept is -21

Answer:

[tex](1)7n^2\\(2)3n^2\\(3) 1[/tex]

Step-by-step explanation:

(1) [tex]14n^2, 35n^4[/tex]

[tex]14n^2=2 X 7 X n^2\\35n^4=5 X 7 Xn^2Xn^2\\$Therefore, the GCF of 14n^2$ and 35n^4$ is 7Xn^2=7n^2[/tex]

(2)[tex]21n^3, 18n^2[/tex]

[tex]21n^3=3 X 7 X n^2 X n\\18n^2 =3 X 6 X n^2\\$Therefore, the GCF of 21n^3$ and 18n^2$ is 3Xn^2=3n^2[/tex]

(3) [tex]7n^2, 9[/tex]

The two terms are co-prime. Therefore their GCF is 1.

Answer:

Look at the figure and take note of the types of three-dimensional figures that make it up. Find the volume of each figure. Add the volumes to find the total volume.

Step-by-step explanation:

The volume of the composite figure is solved

A three-dimensional solid object called a prism has two identical ends. It consists of equal cross-sections, flat faces, and identical bases. Without bases, the prism's faces are parallelograms or rectangles.

The volume of a prism is the product of its base area and height

Volume of Prism = B x h

where B = base area of prism

h = height of prism

Given data ,

If a composite figure is made up of a rectangular prism and a triangular prism, you can find the volume of the rectangular prism by multiplying its length, width, and height. Then, you can find the volume of the triangular prism by multiplying its base, height, and 1/2. Finally, you can add the volumes of both prisms to get the total volume of the composite figure.

Similarly, if a composite figure is made up of two rectangular prisms, you can find the volume of each prism by multiplying its length, width, and height. Then, you can add the volumes of both prisms to get the total volume of the composite figure.

To learn more about volume of prism click :

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Answer:

One sister contributes 26000

The other contributes 25000

26000+25000=51000

Step-by-step explanation:

Answer:

First sister: $26000

Second sister: $25000

Step-by-step explanation:

If one contributed $1000 more than the other then that means that it is haled between them and the first sister contributed $1000 more than the other. Hope this helps :)

Answer:

Because you are looking for square inches of wrapping paper, you are looking for the surface area of the box. A three-dimensional box has a top and bottom that are the same size, a front and back that are the same size, and 2 sides that are the same size...or SA = 2(top/bottom area) + 2(front/back area) + 2(side/side area). Our equation fills in nicely like this:

SA = 2(6 * 14) + 2(6 * 8) + 2(14 * 8)

SA = 2(84) + 2(48) + 2(112)

SA = 168 + 96 + 224

SA = 488 square inches of paper to wrap the box.

Step-by-step explanation:

Answer: 4/3 π 6³

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Volume of a sphere: 4/3 π r³

Replacing with the values given:

V = 4/3 π 6³

If we solve the expression:

V = 4.18 (6)^3

V = 904.77 cubic units

Feel free to ask for more if needed or if you did not understand something.

Answer:

c=13

Step-by-step explanation:

a^2 +b^2= c^2

12^2+ 5^2= 144+25=

169= c^2

c=13

Answer:

90

Step-by-step explanation:

a)

Since, to find the average of a set of numbers, you need to add them all together and divide by the amount of numbers:

[tex]\dfrac{86+83+81+x}{4}=85[/tex]

b)

Multiply both sides by 4:

[tex]86+83+81+x=340\\x=90[/tex]

Hope this helps!

Answer:

x = 45

Step-by-step explanation:

The sum of the angles of a triangle is 180

80+55+x = 180

135 +x = 180

Subtract 135 from each side

x = 180-135

x =45

Answer:

45

Step-by-step explanation:

combining the a and b lengths gives you 135 then subtract by 180 and you get 45.

Answer:

I believe 1 3/4

Step-by-step explanation:

Answer:

B) -7x + 7y = -49

Step-by-step explanation:

This is a y=x plot/line shifted by 7 units.

This can also be verified plugging in the values of x=0,y=-7 and x=7,y=0. The only equation which satisfies these points in Equation B. These points have been chosen as they're the intercepts of this plot.

Answer:

-7x+7y=-49

Step by step Explanation:

This can be verified by giving x=0 and y= -7; x=7 and y=0. The second equation only assures this. Therefore the second equation is correct.

PLS mark me as brainliest

Answer:

A

Step-by-step explanation:

360 - 150 = 210

210 / 3 = 70

but hat doesn't really help..

so lets do this,

add each one of the groups up, if one adds up to 210, its the right one.

A = 210

B = 190

C = 255

D = 255

Answer:

Zero is even (not odd, not neutral)

Zero is neither positive nor negative (the only number with this property)

Zero is an integer (and must be considered when question limits choices to integers)

Zero is a multiple of all numbers (x*0 = 0, so a multiple of any x)

Step-by-step explanation:

Any number to the power of 0 is equal to 1. 0 is neither positive nor negative. 0 is neither prime nor composite. If you add two numbers and the sum is zero, we call the two numbers additive inverses or opposites of each other.

Answer:

B

Step-by-step explanation:

Its the most reasonable graph out of all of them  

Answer:

Top right

Step-by-step explanation:

Looks the most even