Determine whether the parabola y = -x2 + 15x + 8 opens up, down, left, or right.

Answer:

D.  d ≥ 1/2.

Step-by-step explanation:

-12d ≥ -6

d  ≥ -6/-12

d  ≥ 1/2.

The Inequality represents all possible solutions of -12 d ≥ (-6) is d ≤ 1/2.

Inequalities are mathematical formulas in which neither side is equal. Unlike equations, we compare two values in inequality. In between, the equal sign is substituted by a less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.

We have the inequality,

-12 d ≥ (-6).

Now, solving the inequality

Divide both side by 12

(-12 d )/ 12 ≥ (-6)/ 12

-d ≥ -1/2

Now, multiply both side by (-1), we get

d ≤ 1/2.

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Answer:

Step-by-step explanation:

There is no given equation, so it is impossible to figure this out. I apologize.

Answer:

x²+y²=16

Step-by-step explanation:

the general equation for a circle is given as :

(x−h)²+(y−k)²=r²

where (h, k) is the coordinate of the center of the circle and r is the radius

in this case h=0, k=0 and r = 4

equation becomes

x²+y²=4²

or

x²+y²=16

Answer: Last option.

Step-by-step explanation:

The equation of a circle in Center-radius form is:

[tex](x-h)^2+(y-k)^2=r^2[/tex]

Where the center is at the point (h,k) and "r" is the radius.

If the center of this circle is at the origin, means that:

[tex]h=0\\k=0[/tex]

Since the radius is 4, then:

[tex]r=4[/tex]

Now we need to substitute these values into the equation of the circle.

[tex](x-0)^2+(y-0)^2=(4)^2[/tex]

Simplifying the equation, we get:

[tex]x^2+y^2=16[/tex]

This matches with the last option.

Answer:

The inequality would be 4x + 9 ≥ 0

Step-by-step explanation:

You could use this inequality to solve the domain as any number can be put into this equation as long as it doesn't make what is under the square root symbol (4x + 9) negative. Therefore, you can build this inequality and solve from there if you would like.

For this case we have a function of the form [tex]y = f (x)[/tex], where:

[tex]f (x) = \sqrt {4x + 9} +2[/tex]

We must look for the domain of the function. By definition, the domain of a function is given by all the values for which the function is defined.

So, for the given function to be defined, the argument of the root must be positive, that is:

[tex]4x + 9\geq 0[/tex]

Answer:

[tex]4x + 9\geq 0[/tex]

Answer:  C.  150 km²

Step-by-step explanation:

Use similar triangle proportion to find x:

[tex]\dfrac{x}{4.5}=\dfrac{15.3+7.4}{7.4}\\\\\\x=\dfrac{4.5(22.7)}{7.4}\\\\\\x=13.8\\\\\text{Notice that x is the diameter of the circle}\implies r=\dfrac{13.8}{2}=6.9\\\\\\\text{Find the area of the circle using }A=\pi r^2\\A=\pi (6.9)^2\\\\.\ =\pi (47.6)\\\\.\ =149.6\\\\.\ \approx150[/tex]

Answer:

B

Step-by-step explanation:

Add exponents when the bases are multiplied.

a^2 * a ^5

a^(2 + 5)

a^7

Answer:

B. 7

Step-by-step explanation:

Answer:

B) Bisector of an angle  ~apex

Step-by-step explanation:

Option B is correct, bisector of an angle is defined as the set of all points in a plane that are equidistant from the two sides of a given angle.

A system that uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.

The bisector of an angle is a straight line or a line segment that divides an angle into two equal angles.

In other words, the bisector of an angle is the set of all points in a plane that are equidistant from the two sides of a given angle.

The geometric object defined as the set of all points in a plane that are equidistant from the two sides of a given angle is the Bisector of an angle.

Hence, bisector of an angle is defined as the set of all points in a plane that are equidistant from the two sides of a given angle.

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The slope of the airplane's ascent is calculated using the rise over run formula and is 3 / 8 or 0.375.

Explanation:

The slope of the airplane's ascent can be calculated by the ratio of the rise over the run. In this case, the airplane climbs 15 feet up (rise) for every 40 feet it moves forward (run). Therefore, using the formula slope = rise / run, we can determine that the slope of the airplane's ascent is 15 / 40, which simplifies to 3 / 8 or 0.375.

Answer:

-11 F

Step-by-step explanation:

The temperature dropping means to subtract

-2 -9

-11

The temperature at 3 pm is -11 F

Answer:-11°F

Step-by-step explanation:

Answer:

the desired result is (p + q) = (3 + 5) = 8

Step-by-step explanation:

Let's solve this system of linear equations in the usual way:  find the values of p and q.  Then find (p + q) as a numerical result.

Solve:

2p+q=11

p+2q=13

Multiply the second equation by -2:

2p + q = 11

-2p - 4q = -26

Combining these two equations results in -3q = -15, and so q must be 5.

Subbing 5 for q in the first equation, we get:

2p + 5 = 11, or 2p = 6.  Then p = 3.

Then the desired result is (p + q) = (3 + 5) = 8

The required answer is  p + q is equal to 8 by  solving systems of equations 2p+q=11 and p+2q=13. The required sum is 8.

To find the value of p + q, we can use the given system of equations:

Equation 1: 2p + q = 11

Equation 2: p + 2q = 13

We can solve this system of equations by either the substitution method or the elimination method. Let's use the elimination method:

Multiply Equation 1 by 2:

2(2p + q) = 2(11)

4p + 2q = 22 ...(Equation 3)

Subtract Equation 2 from Equation 3:

(4p + 2q) - (p + 2q) = 22 - 13

4p + 2q - p - 2q = 9

3p = 9

Divide both sides by 3 to solve for p:

p = 9 / 3

p = 3

Now substitute the value of p back into Equation 1:

2(3) + q = 11

6 + q = 11

Subtract 6 from both sides to solve for q:

q = 11 - 6

q = 5

Finally, we can find p + q:

p + q = 3 + 5

p + q = 8

Therefore, p + q is equal to 8 solving systems of equations 2p+q=11 and p+2q=13. The required sum is 8.

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Answer:

No

Step-by-step explanation:

g(x)= 5x-1 is the same as g(x)= 5x^1 - 1x^0, which contains one odd power (x^1) and one even power (x^0).  Therefore, g(x)= 5x-1 is neither even nor odd.

Answer:

Step-by-step explanation:

[tex]\text{If}\ f(-x)=f(x)\ \text{then}\ f(x)\ \text{is an even function.}\\\\\text{If}\ f(-x)=-f(x)\ \text{then}\ f(x)\ \text{is an odd function.}[/tex]

======================================================

[tex]g(x)=5x-1\\\\g(-x)=5(-x)-1=-5x-1=-(5x+1)\\\\g(-x)\neq-g(x)\ \wedge\ g(-x)\neq g(x)[/tex]

Answer:

[tex]2 \times 3.14 \times radius[/tex]

B

Answer:

The process he should use in order to find the circumference of a circle is that he should find the radius and multiply the radius by 2 and then afterwards multiply the product by pi or 3.14. This is because the circumference of a circle is formulated as C = 2πr or C = 2(3.14)r.

Step-by-step explanation

with that being said the answer should be B

Answer:

D

Step-by-step explanation:

Since its less then the circle is open and the arrow goes to the left. The circle must be on -1. The answer is D.

Answer:

9000. the value of 9 in 920 is 900. and ten times anything is basically just adding a 0. so ten times 900 is 9000.

Step-by-step explanation:

Please mark brainliest and have a great day!

Answer:

D

Step-by-step explanation:

point-slope form is y-y1=m(x-x1) . since the slope is 2 and not -2, you can automatically eliminate choices A and C. since the y-value in the point, (1,-1), is -1, you will add it to y because you are subtracting a negative. (- - = +) therefore, the final equation, in point-slope form, is y+1=2(x-1), or answer choice D.

Answer:

h(-4) = -2

Step-by-step explanation:

h(x) = −2x − 10

Plug in x = -4 into the function h(x) = −2x − 10

h(-4) = −2(-4)  − 10

h(-4) = 8 - 10

h(-4) = -2

Answer:

The answer is -2

Step-by-step explanation: If h(x)= -2(-4)-10

h(x)=8-10

h(x)=-2

ANSWER

B'(5,-2).

EXPLANATION

The coordinates of B are (-2,5).

We want to find the image of this point after a reflection in the line y=x.

The mapping is

[tex](x,y)\to (y,x)[/tex]

We just have to swap the ordered pairs.

[tex]( - 2,5)\to (5, - 2)[/tex]

Hence the image of B(-2,5) is B'(5,-2).

The correct answer is (5,-2).

You must make a [tex]\frac{part}{whole}[/tex] proportion.

92% is part of 100%

540 would need to be the 92% of the plant bought. That means 540 is the part and the whole would be the unknown (let's make this x)

Set up your proportion like so...

[tex]\frac{540}{x} =\frac{92}{100}[/tex]

Cross multiply...

92x = 540 * 100

92x = 54000

Isolate x by dividing 92 to both sides...

92x/92 = 54000/92

x = 586.9565

Since you can't buy a decimal of a plant you will have to round this number up to the next whole number...

587

To have 540 of the plants arrive alive the nursery owner must order 587 plants

Hope this helped!

~Just a girl in love with Shawn Mendes

The answers are:

[tex]AbsoluteError=20mhz[/tex]

[tex]RelativeError=2.5(Percent)[/tex]

To solve the problem we need to remember that the absolute error is the difference between the expected value and the measured value, also, to calculate the relative error we first need to calculate the absolute error, and then, divide it by the expected measure.

So, calculating we have:

[tex]AbsoluteError=Expected-MeasuredValue\\\\AbsoluteError=800mhz-820mhz=-20mhz[/tex]

We can see that we obtained a negative value, however, when we are working with "absolute" values, the negative symbol is discarded, so, we have that:

[tex]AbsoluteError=20mhz[/tex]

Now, to calculate the relative error, we need to use the following formula:

[tex]RelativeError=\frac{AbsoluteError}{ExpectedValue}*100\\\\RelativeError=\frac{20}{800}*100=0.025*100=2.5(Percent)[/tex]

So, we have that the relative error is equal to 2.5%.

Hence, we have that:

[tex]AbsoluteError=20mhz[/tex]

[tex]RelativeError=2.5(Percent)[/tex]

Have a nice day!

Absolute error is 20 MHz and relative error is 2.5%.

Absolute error: Absolute error is the difference between the measured value and the actual value. In this case, the absolute error is 820 MHz - 800 MHz = 20 MHz.

Relative error: Relative error is the ratio of the absolute error to the actual value. The relative error can be calculated as (820 MHz - 800 MHz) / 800 MHz = 0.025 or 2.5%.

Answer:

Step-by-step explanation:

(1) y = 4x + 5 and (2) y = 4x - 5

substitute (1) to (2):

4x + 5 = 4x - 5         subtract 4x from both sides

5 = -5      FALSE (no solution)

(1) y = 4x + 5 and (2) 2y = 8x + 10

substitute (1) to (2):

2(4x + 5) = 8x + 10          divide both sides by 2

4x + 5 = 4x + 5         subtract 4x from both sides

5 = 5   TRUE (infinitely many solutions)

(1) y = 4x + 5 and (2) y = x + 5

substitute (1) to (2):

4x + 5 = x + 5         subtract 5 from both sides

4x = x          subtract x from both sides

3x = 0         divide both sides by 3

x = 0

Put it to (2):

y = 0 + 5 = 5

One solution (0, 5)

(1) y = 4x + 5 and (2) y = 8x + 10

substitute (1) to (2):

4x + 5 = 8x + 10       subtract 5 from both sides

4x = 8x + 5       subtract 8x from both sides

-4x = 5           divide both sides by (-4)

x = -1.25

Put it to (1):

y = 4(-1.25) + 5 = -5 + 5 = 0

One solution (-1.25, 0)

Answer:

D

Step-by-step explanation:

Answer:

C. y = -1/2 x

Step-by-step explanation:

Slope = (-2 - 0)/(4 - 0) = -1/2, b = 0

So

y = -1/2 x

Answer:

C

Step-by-step explanation:

By observation, we can see that the slope of the graph is negative (i.e the graph goes from top left to bottom right) hence the number attached to the x-term must be negative. We can see that E and F have positive x-terms, hence these cannot be correct.

Now we are left with A, B, C, D as possible choices.

you are given that point (4, -2) is on the line, hence when x = 4, y must = -2.

Use this knowledge to test each of A, B, C, D to see which one gives y = -2 when we try x = 4

When x = 4

A) -[tex]\frac{1}{4}[/tex] (4) = -1 ≠ -2 (wrong)

B) -2 (4) = -8 ≠ -2 (wrong)

C) -[tex]\frac{1}{2}[/tex](4) = -2 (correct)

D) -4(4) = -16 ≠ -2 (wrong)

Answer:

The turning point is (2,8)

Step-by-step explanation:

we know that

The general equation of the substance's temperature is equal to

[tex]T(x)=(x-h)^{3}+k[/tex]

where

(h,k) is the vertex (turning point)

In this problem we have

[tex]T(x)=(x-2)^{3}+8[/tex]

so

(h,k)=(2,8)

therefore

The turning point is (2,8)

Answer:

A

Step-by-step explanation:

measurement will tell him the minimum amount of wood that he will need to build the frame by the perimeter of the painting

The correct option is (A).

The perimeter of a shape is defined as the total distance around the shape. It is the length of the outline or boundary of any two-dimensional geometric shape.

As Arjun need to build the frame for the painting.

For framing  or fencing we generally use the concept of Perimeter.

For example,

Let us consider an example.

David wants to put a fence around his farm so that his sheep will not wander away.

He wants to know how much wire he would need to fence around his farm.

The shape of the field is rectangular.

Now, if we add the distance of all 4 sides of his farm, it will give us the perimeter.

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Answer:

C.(10x^2-4) - (7x^2+3)

In option C,

(10x^2-4) - (7x^2+3) = 10x^2 - 4 - 7x^2 - 3 = 3x^2 - 7

⇒ Option C is correct

Answer:

To test whether or not a number is divisible by 4 is to check to see if the number that’s made from the final two digits of the original number is itself divisible by 4. If it is, then the entire number is divisible by 4 too.

Answer:

7.1 inches

Step-by-step explanation:

An Isosceles right triangle is one with two sides equal and the angles equal too.The angles in this case are 45°

For this question, to get the hypotenuse, you apply the Pythagorean relationship where the legs will be represented by a and b where as the hypotenuse will be represented by c.

[tex]a^2+b^2=c^2\\[/tex]

Given;

One leg = 5 inches, but you know that in this triangle, the two sides are equal, hence the other side/leg is 5 inches.

Lets take one side of the triangle as a=5 inches

The other side as b=5 inches

The hypotenuse as c=?

Apply the expression;

[tex]a^2+b^2=c^2\\\\5^2+5^2=c^2\\\\25+25=c^2\\\\50=c^2\\\\c=\sqrt{50} =7.071[/tex]

To the nearest tenth 7.071 = 7.1 inches

Answer:

Rabbit pen: 180

Garage: 720

180x4=720

Hope this helps :)

Answer:

Step-by-step explanation:

You get the center just by reading the given point.

(x - 5)^2 + (x + 2)^2 = r^2 Notice that the center switches signs.

(8,2) is given so that you can figure out the radius.

The radius uses the distance formula to get from (5,-2) to (8,2)

x1 = 5

x2 = 8

y1 = -2

y2 = 2

==================

formula

d^2 = (x1 - x2)^2 + (y1 - y2)^2

solution

d^2 = (5 - 8)^2 + (-2 - 2)^2

d^2 = (-3)^2 + (-4)^2

d^2 = 9 + 16

d^2 = 25

==================

Answer

(x - 5)^2 + (y + 2)^2  =  25

Hello There!

n - d = 0

5n+10d = 90

----------------------

n-d = 0

n+2d = 18

-------------------

Subtract and solve for "d":

3d = 18

d = 6 (# of dimes)

n = d = 6 (# of nickels)