The table shows the cost and number of minutes for different phone cards offered by a company. Which is the BEST VALUE?

A) 175 minutes
B) 200 minutes
C) 425 minutes
D) 545 minutes

Answer:

13 and 16 are functions.

If the x does not repeat,it is a function

Answer:

B) x = 3, y = 0

Step-by-step explanation:

I will use the subtraction method, at least i think it is the subtraction method lol:

2x - 2y = 6

3x + 2y = 9

1: Combine

5x=15

x=3

2: Substitute

2(3)-2y=6

6-2y=6

-2y=0

y=0

3: Check by pluggin answers in

2(3)-2(0)=6

6-0=6

6=6 true

3(3)+2(0)=9

9+0=9

9=9 true

DISCLAIMER: the answers might not be right, so you should check just in case and i hope this made sense, you can ask questions too.

also... i would be great if i got a brainliest because i need one more to level up but you don't have to bc i bet someone has a better explanation hehe

Answer:

i want to say 28

Step-by-step explanation:

this is because 3 times 4 is 12 so i multiplied 7 by 4

Answer:

A = 400 cm^2

Step-by-step explanation:

The perimeter of a square is given by

P = 4s where s is the side length

80 = 4s

Divide each side by 4

80/4 = 4s/4

20 =s

We want to find the area of the square

A = s^2

A = 20^2

A = 400 cm^2

Answer:

0.0083

Step-by-step explanation:

Move the decimal place to the left three times

Answer:

0.0083

Step-by-step explanation:

Answer:

4.5

Step-by-step explanation:

Just took the Test

The required time the student spends on studying is 9.5 hours. Option C is correct.

The association between two numerical variables measured for the same individuals is displayed in a scatterplot. One variable's values are displayed on the horizontal axis, and the other variable's values are displayed on the vertical axis.

here,

Given the regression line,
y = 3.1 x + 40.5.

Put y = 70
70 = 3.1x + 40.5
70 - 40.5 = 3.1x
x = 29.5/3.1
x = 9.51

Thus, the required time the student spends on studying is 9.5 hours. Option C is correct.

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Answer:

Step-by-step explanation:

exterior angle=180-115=65°

Answer:

it would be a and c

Step-by-step explanation: Because if you had a zero on a number line you would subtract 5 from the left and that would give you negative 5

Answer:

If the sum is x, x+5

Step-by-step explanation:

The sum of the two numbers x+y = a, increased by 5, a+5.

The sum of two numbers increased by 5 to be determined.

The sum is defined as the addition of two or more values.

Here,
Let the two numbers be x and y.
their sum is x+y = a(let)
Now the sum is increased by 5.
=a+5

Thus, the sum of the two numbers x+y = a, increased by 5, a+5.

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Answer:

6

Step-by-step explanation:

square root of 36 is 6 ^w^

u = 6

Answer:

Since the values vary from 0.5 to 4.5, let's take 5 intervals of width 1 unit each

(Lower boundary is included, upper boundary is not)

Average

no. of --------> frequency

movies

_______ __________

0 - 1 --------------> 1

1 - 2 --------------> 5

2 - 3 --------------> 5

3 - 4 --------------> 2

4 - 5 --------------> 1

For frequencies, just count the data values in each interval

so the right answer is of option B....

Answer:

√2

Step-by-step explanation:

According to the question

10/√50

So it can also be written as

10/√25×2

10/√25×√2

10/5√2

Divide both by 5

2/√2

Rationalize

2/√2 ×√2/√2

2√2/2

Divide both by 2

√2

Therefore the answer is√2

Answer:

x= 2

Step-by-step explanation:

hello :

y= -5x²+20x      a= -5    b= 20

the axis symmetry  is the line when an equation is : x = -b/2a

x= -(20)/2(-5)

x= 2

The equation of axis of symmetry of the given parabola is x =2

A parabola is a plane curve drawn so that any point on it is the same distance from the focus and the directrix.

Given is an equation of parabola, y= -5x²+20x      

a= -5    b= 20

the axis of symmetry  is the line when an equation is : x = -b/2a

x= -(20)/2(-5)

x= 2

Hence, The equation of axis of symmetry of the given parabola is x =2

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Answer:

x = 6

Step-by-step explanation:

13x + 2 = 12x + 8

Because of:

1) Corresponding angles

2) Vertically opposite angles

13x + 2 = 12x + 8

13x - 12x = 8 - 2

x = 6

Answer:

x = 6

Step-by-step explanation:

13x + 2 = 12x + 8

13x - 12x = 8 - 2

x = 6

Answer:

Runner 1

Step-by-step explanation:

Runner 1's speed is the slope of the line = (20-0)/(2-0) = 10

Runner 2's speed is the slope of the line = 8.5 (the coefficient of t)

Runner 3's speed is slope = (36-18)/(4-2) = 9

The fastest pace, therefore is of runner 1, because 10>9 AND 10>8.5

Answer:A

Step-by-step explanation:

Just took the ed test

Answer: 15

Step-by-step explanation:

When you plot the points, it makes a rectangle. The length is 5 units and the height is 3 units. 5 times 3 is 15

Final answer:

The correct simplified form is \(\frac{1}{r^7} + \frac{1}{s^{12}}\), with each term representing the reciprocal of the base raised to a positive exponent and kept as separate terms.

Explanation:

The simplified form of r-7 + s-12 is \(\frac{1}{r^7} + \frac{1}{s^{12}}\). The negative exponents indicate that each term is the reciprocal of the base raised to the positive exponent. So, r-7 becomes \(\frac{1}{r^7}\) and s-12 becomes \(\frac{1}{s^{12}}\). Since these are two separate terms, they are not combined together into a single fraction.

To find the air pressure of a thunderstorm, the given wind velocity is substituted into the function and the equation is solved for the air pressure in millibars.

To find the air pressure of a thunderstorm where the wind velocity is 49.3 meters per second, we need to substitute this given wind velocity into the given function and solve for p.

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To calculate the air pressure during a thunderstorm with a wind speed of 49.3 m/s, use the mathematical function provided. Solve for 'p' by setting the function equal to given wind speed, isolating 'p', and calculating thereafter.

The student's question pertains to finding an unknown in the function v(p) = 5.7 √998 - p, given that the wind velocity is 49.3 m/s. The expression given is for wind velocity in a storm, based on changing air pressure. To answer this, we need to solve the equation for 'p'.

1. First, we set the equation equal to 49.3: 49.3 = 5.7 √998 - p

2. Then we isolate the square root term by dividing by 5.7: (49.3/5.7) = √998 - p

3. After that, we square both sides to eliminate the square root: (49.3/5.7)^2 = 998 - p

4. We then isolate 'p' by subtracting the result from 998: p = 998 - (49.3/5.7)^2

Doing the calculations will give the approximate value of 'p', which is the air pressure in millibars for a thunderstorm with a wind velocity of 49.3 m/s.

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Radius of a sphere with a volume of 26,244π inches³ is 27 inches.

Volume of a sphere, V = (4/3)πr³.

Given the volume of 26,244π inches³,

(4/3)πr³ = 26,244π

The radius of sphere (r) =

r³ = (26,244π)/(4/3)π

r³ = 26,244 × (3/4)

r³ = 19,683

r = ∛19,683

r = 27 inches

The radius of the sphere is 27 inches.

The formula for the volume (V) of a sphere with radius (r) is given by:

[tex]\[ V = \frac{4}{3} \pi r^3 \]Given that the volume (\( V \)) of the sphere is \( 26,244\pi \) cubic inches, we can set up the equation:\[ 26,244\pi = \frac{4}{3} \pi r^3 \]To solve for \( r \), we first divide both sides by \( \frac{4}{3} \pi \):\[ r^3 = \frac{26,244\pi \times \frac{3}{4}}{\pi} \]\[ r^3 = 19,683 \][/tex]

Taking the cube root of both sides:

[tex]\[ r = \sqrt[3]{19,683} \]\[ r \approx 27 \][/tex]

Therefore, the radius of the sphere is 27 inches.

Answer:

78.26%

Step-by-step explanation:

Answer:b)88.5 ft squared

Step-by-step explanation:

Answer:

B) 88.5 ft²

Step-by-step explanation:

Answer:

The sample was not chosen at random.

Step-by-step explanation:

For it to be a representative sample the selection needs to be completely random.

Answer:

The sample was not chosen random .

Step-by-step explanation:

Answer: A = 2500 (1.035)^n

A= $ 4,974.47

Step-by-step explanation:

A=P(1+r)^n

A= Amount

P= Principal

R= rate

N= # of years

A= 2500(1.035)^n

N=20

2500(1.035)^20

A= 4,974.47

Answer:

the answer should be h=22 so i would say step 1

Step-by-step explanation:

The mistake was in Step 1.

An equation is a mathematical statement that is formed when two algebraic expressions are equated using an equal sign.

The equation is

(1/2) (2h-4) = 20

2h-4 = 40

2h = 44

h = 22

The mistake was in step 1, where Nigel should have multiplied 20 by 2 and not divide it by 2.

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First, calculate the volume of water needed to fill the pond one-quarter of the way up, then multiply that by the cost per cubic foot to find the total cost, which is approximately $2297.29.

The subject of this question is Mathematics, more specifically, it involves the use of geometry and algebra. The question is asking about the cost of filling a cylindrical pond one-quarter of the way up with water, given the dimensions of the pond and the price of water per cubic foot.

To answer this question, we first need to determine the volume of water needed. Since the pond is cylindrical, we use the formula for the volume of a cylinder: V = πr²h, where r is the radius and h is the height. The diameter is given as 30 feet, so the radius is 15 feet (half the diameter), and we're filling to a depth of 1.25 feet (one-quarter of the 5-foot depth). This gives us a volume of approximately 706.86 cubic feet.

We then multiply this volume by the price of water. At $3.25 per cubic foot, that's a total cost of about $2297.29. So, you would need to spend approximately $2297.29 to fill the pond one-quarter of the way up with water.

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Answer:

I think its A

Step-by-step explanation:

Answer:

surface area of a cone = 132.935πft

Step-by-step explanation:

to find the surface area of a cone

given that

radius = 5ft

height of cone = 21ft

recall that the formulae for finding the surface area of a cone = πr( r + √ h² + r²)

so,

surface area of a cone = πr( r + √ h² + r²)

surface area of a cone = π x 5( 5 + √ 21² + 5²)

surface area of a cone = 5π ( 5 + √ 441 + 25)

surface area of a cone = 5π( 5 + 21.587)

surface area of a cone = 5π (26.587)

surface area of a cone = 132.935πft

Answer:

x+5

Step-by-step explanation:

Answer:

[tex]$\frac{3456\left(x-3\right)}{5x\left(x+3\right)}$[/tex]

Step-by-step explanation:

[tex]$ \frac{12^4(x-3)(x+5) }{30x(x+3)(x+5)} $[/tex]

[tex]$\frac{12^4\left(x-3\right)}{30x\left(x+3\right)}$[/tex]

[tex]$\frac{2^8\cdot \:3^4\left(x-3\right)}{2\cdot \:3\cdot \:5x\left(x+3\right)}$[/tex]

[tex]$\frac{2^7\cdot \:3^3\left(x-3\right)}{5x\left(x+3\right)}$[/tex]

[tex]$\frac{3456\left(x-3\right)}{5x\left(x+3\right)}$[/tex]