All categories

2 years ago

3x+8-X=57-4 Is 7 a solution to the question

Mathematics

2 answers:

Diano4ka-milaya [45]2 years ago

8 0

Answer:

7 is not a solution for x.

Step-by-step explanation:

To see if 7 is a solution for x, we will simply plug in the value for x and see if the left hand side is equal to the right hand side.

3x + 8 - x = 57 - 4

3(7) + 8 - (7) ?= 57 - 4

21 + 8 - 7 ?= 53

29 - 7 ?= 53

22 ?= 53 (( NO ))

Since 22 does not equal 53, 7 is not a solution for x.

Let's find the solution for x:

3x + 8 - x = 57 - 4

2x + 8 = 53

2x = 45

x = 22.5

Let's validate this solution for x:

3x + 8 - (x) = 57 - 4

3(22.5) + 8 - (22.5) ?= 57 - 4

67.5 + 8 - 22.5 ?= 53

45 + 8 ?= 53

53 == 53 (( YES ))

Since 53 is indeed equal to 53, then 22.5 is a solution for x.

Cheers.

ycow [4]2 years ago

5 0

Answer:

No, 7 is not a solution. x=11.25

Step-by-step explanation:

To find whether 7 is a solution, we can plug it in as x.

3(7)+8-7=57-4

21+15=53

36=53

No, 7 is not a solution.

We can find the solution by solving out the equation normally

3x+8+x=57-4

2x+8=53

2x=45

x=22.25

You might be interested in

What is the slope of a line with the equation y=5x+2/5

igomit [66]

The slope-intercept form: y = mx + b

m - a slope

y = 5x + 2/5

Answer: The slope m = 5.

4 0

3 years ago

Conduct the appropriate hypothesis test and compute the test statistic. A company that produces fishing line undergoes random te

andre [41]

Answer:

Option D) Yes, because the test statistic is -2.01

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30 pound

Sample mean, $\bar{x}$ = 29.1 pounds

Sample size, n = 20

Alpha, α = 0.05

Sample standard deviation, s = 2 pounds

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30\text{ pounds}\\H_A: \mu < 30\text{ pounds}$

We use one-tailed(left) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{29.1 - 30}{\frac{2}{\sqrt{20}} } = -2.012$

Now,

$t_{critical} \text{ at 0.05 level of significance, 19 degree of freedom } = -1.729$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis. Thus, there were enough evidence to conclude that the fishing line breaks with an average force of less than 30 pounds.

Option D) Yes, because the test statistic is -2.01

5 0

3 years ago

Find the domain of the function.<br><br><br><br> f(x) = -5x + 3

Sedaia [141]

Enter a problem...

Calculus Examples

Popular Problems Calculus Find the Domain and Range f(x)=5x-3

(

)

−

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

(

−

∞

)

Set-Builder Notation:

{

∈

}

The range is the set of all valid

values. Use the graph to find the range.

Interval Notation:

(

−

∞

)

Set-Builder Notation:

{

∈

}

Determine the domain and range.

Domain:

(

−

∞

)

{

∈

}

Range:

(

−

∞

)

{

∈

}

3 0

2 years ago

Identify the savings options and the investment options. business ownership bonds money market account promotional CD

Bond [772]

Answer:

The given options are -

business ownership

bonds

money market account

promotional CD

Now we have to identify these under saving options or investment options.

So, saving are :

promotional CD and money market account ( money market account is a type of saving account that can pay higher interest rate than normal savings accounts, but these accounts have higher minimum deposits.)

And investment are :

business ownership and bonds.

8 0

3 years ago

Read 2 more answers

How do we find the missing side of a shape when we are given the perimeter?

ryzh [129]

Answer:

subtract the inside number's

Step-by-step explanation:

first you add the inside numbers and then once you get that number lets to say you got 66, 66 times 66=4,356 then thats your number

4 0

3 years ago