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4 years ago

4 ( 2x + 1 ) = 5x + 4 + 3x

Mathematics

2 answers:

elena55 [62]4 years ago

7 0

Answer: Yes, it is true

Step-by-step explanation:

From the equation (2x + 1) = 5x + 4 + 3x,

Step 1: Open the bracket this gives

8x + 4 = 5x + 4 + 3x

Step 2: Combine like terms in the right hand side of the equation

8x + 4 = 5x + 3x +4

8x + 4 = 8x +4

borishaifa [10]4 years ago

5 0

Answer:

Statement is true

Step-by-step explanation:

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ASAP HELP! Look how much im offering, congruent shapes.

dmitriy555 [2]

Answer:

D. 7.5 inches

Step-by-step explanation:

So, we can find the ratio of the big triangle to the small one by dividing the values of the hypotenuse.

So, 18/6 = 3

Big:small = 3:1

So, using this we can make an equation to find AD.

Let's say ED=x.

AD is basically ED (x) + AE (5).

Since ED is part of the small triangle, and AD is part of the big one, we can use the 3:1 ratio from above.

So, $\frac{x+5}{x}$ =3.

Multiply both sides by x, getting x+5 = 3x.

Subtract the x: -x -x

And you get 5=2x, giving you 2.5 = x.

However, we're not done yet, as 2.5 is the value of ED, but we need AD.

Remember, AD is = ED + AE.

So, AD = 2.5 + 5.

Finally, AD = 7.5

7 0

3 years ago

Calculate the momentum of a 1 kg ball that is moving eastward at 12 m/s.

kherson [118]

The mass of an object multiplied by its velocity.
A moving object can have a large momentum if it has a large mass, a high speed, or both. 
It is harder to stop a large truck than a small car when both are moving at the same speed. 
The truck has more momentum than the car. By momentum, we mean inertia in motion.

3 0

4 years ago

Hailey sold 20 tickets to the school play for a total of 225$.Early bird tickets were 10$ and regular priced tickets were 15$.Wr

dlinn [17]

Answer:

The system of equation are $\left \{ x+y=20} \atop {10x+15y=225}} \right.$

The number of early bird tickets are 15 and of regular tickets are 5.

Step-by-step explanation:

Given,

Total number of tickets = 20

Total amount = $225

Solution,

Let the number of early bird tickets be 'x'.

And also let the number of regular tickets be 'y'.

Now total number of tickets is the sum of number of early bird tickets and number of regular tickets.

So framing in equation form, we get;

Total number of tickets = number of early bird tickets + number of regular tickets

$x+y=20\ \ \ \ equation\ 1$

Again, Total amount is the sum of number of early bird tickets multiplied with price of each ticket and number of regular tickets multiplied with price of each ticket.

So framing in equation form, we get;

$10x+15y=225\ \ \ \ \ equation\ 2$

Hence the system of equation are $\left \{ x+y=20} \atop {10x+15y=225}} \right.$

Now we solve the equation by multiplying equation 1 by 10, and get;

$10(x+y)=20\times10\\\\10x+10y=200\ \ \ \ equation\ 3$

Now subtracting equation 3 from equation 2, we get;

$(10x+15y)-(10x+10y)=225-200\\\\10x+15y-10x-10y=25\\\\5y=25\\\\y=\frac{25}{5}=5$

On substituting the value of 'y' in equation 1, we get;

$x+y=20\\\\x+5=20\\\\x=20-5=15$

Hence The number of early bird tickets are 15 and of regular tickets are 5.

3 0

3 years ago

Which graph represents y=^3{x

dexar [7]

I need to see a photo of the graph to choose the correct answer

5 0

3 years ago

A study of the use of social media asked a sample of 488 American adults under the age of 40 and a sample of 421 American adults

mr_godi [17]

Answer:

The correct option is (c).

Step-by-step explanation:

The assumptions of a two-sample t-test are:

Independent samples
Normality
Equal variances

It is provided that the sample of selected for American adults under the age of 40 is of size, n₁ = 488 and the sample of selected for American adults aged 40 or over is of size, n₂ = 421.

As the sample size is quite large the according to the Central limit theorem the sampling distribution of the sample mean would follow a Normal distribution.

And even if the sample was selected by dialing of various telephone numbers, the sample is not biased since the size of the sample is too large.

So, the sample can be considered as a simple random sample.

Thus, the conditions for two-sample t inference are satisfied.

The correct option is (c).

8 0

3 years ago