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3 years ago

What does cubed number mean????? please give examples

Mathematics

2 answers:

Ludmilka [50]3 years ago

4 0

A Cubed Number Mean a number to the 3 power.
Examples: $3^3$

kirza4 [7]3 years ago

4 0

What you get when a number is times by itself 3 times live 4x4x4=64,so64 is a cubed number

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If there are 205 students in the school, which is the best estimate of the number of students that are in the 5th grade?

Mila [183]

Answer:

34 people

Step-by-step explanation:

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3 years ago

Which inequality is represented by the graph?y > -2/3x + 1y < -2/3x + 1y < -3/2x + 1y > -3/2x + 1

Tanya [424]

Answer:

$y < -\frac{3}{2}x+1$

Step-by-step explanation:

Given:

From the graph shown,

The broken line means that the inequality sign will be either < or >.

The shaded region is to the left of the broken line. This means that $y < f(x)$ .

Now, in order to find equation of line, we need slope and y-intercept.

From the graph, the y intercept is at $(0,1)$ . So, y intercept is 1.

Also, if we consider two points $(0,1)\textrm{ and }(2,-2)$ on the line, then slope is given as:

$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{-2-1}{2-0}=\frac{-3}{2}=-\frac{3}{2}$

Therefore, the equation of the line is given as:

$y=mx+b\\y=-\frac{3}{2}x+1$

But as the shaded region is to the left of the line,

∴ $y$ is the correct answer.

7 0

3 years ago

During a test period, an experimental group of 10 vehicles using an 85 percent ethanol-gasoline mixture showed mean CO2 emission

Aleksandr-060686 [28]

Answer:

Probably unequal ( B )

Step-by-step explanation:

experimental group = 10

using 85% ethanol gasoline

mean = 240 pounds per 100 miles

standard deviation = 20 pounds

control group = 14 vehicles

using regular gasoline

mean = 252 pounds per 100 miles

standard deviation = 15 pounds

comparing the sample variance of each group shows that they are probably unequal using the equation below

Variance for a sample set of data = ∑ ( x - X ) ^2 / n - 1

where n = number of events

X = mean value

x = value of events

8 0

3 years ago

6x+6y=24 how do you solve?

alukav5142 [94]

Answer:

i would divide to 6 of each side of the equation which leadss tyo x+y=4

and just draw coordinate system to see all possible answers

Step-by-step explanation:

there are endless of answers unless there is a limiter

6 0

3 years ago

Drew is 3 years younger than his brother, Jimmy. The sum of the brothers' ages is 21 1. Draw a bar model to represent this situa

alina1380 [7]

The first step to solving a story problem is identifying variables. For this problem, I will identify the variables as:

D = Drew's age

J = Jimmy's age

Once the variables are identified, we need to find as many equations as we have variables. Since we have two variables, we will have to write two equations.

Since Drew is 3 years younger than Jimmy: D + 3 = J

Since the sum of the brothers' ages is 21: D + J = 21

Once I have two equations is two variables, I can solve the system using either substitution method or elimination method. For this problem, I will use substitution method.

D + J = 21 Equation 2

D + (D + 3) = 21 Substitution of value of J from equation 1 into equation 2

D + D + 3 = 21 Associative property of addition

2D + 3 = 21 Simplify

2D + 3 - 3 = 21 - 3 Subtract 3 from each side

2D = 18 Simplify each side

2D/2 = 18/2 Divide each side by 2

D = 9 Simplify each side

Now that we have D, we can substitute it into equation 1 to get the value of J

D + 3 = J Equation 1

9 + 3 = J Substitution

12 = J Simplify

7 0

3 years ago