1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pentagon [3]
3 years ago
6

What does this equal to -31 + 4x = -2x + 35

Mathematics
1 answer:
romanna [79]3 years ago
5 0

Answer:

<u><em>x=11</em></u>

Step-by-step explanation:

-31+4x=-2x+35

+31

4x=-2x+66

+2x

6x=66

66/6

You might be interested in
Solve the system of equations using substitution method<br>x=y+2<br>x+2y=5<br>PLEASE HELP!!​
nlexa [21]

Answer:

x=1

y=-1

Step-by-step explanation:

x = y+2

x+2y = 5

y+2 +2y = 5

3y +2 = 5

3y = 3

y=1

x=-1

6 0
3 years ago
Read 2 more answers
How do you write .049 in expanded form?
IgorC [24]
0.049=0.04+0.009
3 0
2 years ago
Read 2 more answers
Kids with cell phones: A marketing manager for a cell phone company claims that less than 58% of children aged 8-12 have cell ph
Vikentia [17]

Answer:

z=\frac{0.54 -0.58}{\sqrt{\frac{0.58(1-0.58)}{820}}}=-2.32  

p_v =P(z  

Since the p value is lower than the significance level \alpha=0.1 we have enough evidence to reject the null hypothesis and the claim for the manager makes sense.

For the Ti84 preocedure we need to do this:

STAT> TESTS> 1-Z prop Test

And then we need to input the following values:

po= 0.58

x = 443 , n= 820

prop <po

And then calculate and we will get the same results

Step-by-step explanation:

Data given and notation

n=820 represent the random sample taken

X=443 represent the people that had cell phones

\hat p=\frac{443}{820}=0.540 estimated proportion of people that had cell phones

p_o=0.58 is the value that we want to test

\alpha=0.1 represent the significance level

Confidence=90% or 0.90

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

System of hypothesis

We need to conduct a hypothesis in order to test the claim that the true proportion is less than 0.58.:  

Null hypothesis:p\geq 0.58  

Alternative hypothesis:p < 0.58  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

And replacing we got:

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.54 -0.58}{\sqrt{\frac{0.58(1-0.58)}{820}}}=-2.32  

Decision

The significance level provided \alpha=0.1. Now we can calculate the p value

Since is a left tailed test the p value would be:  

p_v =P(z  

Since the p value is lower than the significance level \alpha=0.1 we have enough evidence to reject the null hypothesis and the claim for the manager makes sense.

For the Ti84 preocedure we need to do this:

STAT> TESTS> 1-Z prop Test

And then we need to input the following values:

po= 0.58

x = 443 , n= 820

prop <po

And then calculate and we will get the same results

5 0
3 years ago
Hi please help fast.!
katovenus [111]

Answer:

sorry I'm not that good with math sorry if I waisted your time ^_^

4 0
2 years ago
5x-6=2x+9 solve and Check the solution
pickupchik [31]

Answer:

x = 5

Step-by-step explanation:

Take your starting equation:

5x - 6 = 2x + 9

Your first step should be to isolate the variable, X, by having it on only one side of the equation. This can be done by subtracting one of the X values (either 5x or 2x) from either side, but I recommend the side with 2x since it's a smaller value and won't result in a negative.

(This is the right side of the equation)

2x + 9

- 2x

= 9

We need to do the same thing on the other side of the equation too, to balance both sides:

(This is the left side of the equation)

5x - 6

- 2x

= 3x - 6

This is our equation now:

3x - 6 = 9

The next step is to isolate X further by removing any constants (regular numbers) from the side with X. Since the constant on that side is -6, we need to add 6 to that side so that it's cancelled out, and do the same on the other side to balance.

(This is the left side of the equation)

3x - 6

+ 6

= 3x

And now for the other side:

(This is the right side of the equation)

9

+ 6

= 15

This is our current equation:

3x = 15

The final step is to get X completely isolated. X is being multiplied by 3, so we need to divide both sides of the equation by 3 to finally get the value of X.

(This is the left side of the equation)

3x

÷ 3

= x

And now for the other side:

(This is the right side of the equation)

15

÷ 3

= 5

Our final equation:

x = 5

We can check our answer by taking the final X value, 5, and inserting it into our beginning equation.

This is the beginning equation, as a reminder:

5x - 6 = 2x + 9

Replace all instances of X with its value, 5:

(5 · 5) - 6 = (2 · 5) + 9

After simplifying, the result is:

19 = 19, which means the X value is correct.

4 0
1 year ago
Other questions:
  • Mrs. Mary Moolah invested $20,000 in
    11·1 answer
  • Evaluate the exact value: tan(pi/6)
    6·2 answers
  • Which answer is the equivalent of sin x?<br> A. tan y<br> B. cos x<br> C. tan x<br> D. cos y
    7·2 answers
  • 9. Let f(x) = 4x + 7 and g(x) = 3x - 5. Find.(g×f)(-4) Pick one
    6·1 answer
  • 6(x + 3) =6x + 18 <br> is what kind of property?
    7·2 answers
  • Which animal could be about a decimeter long? Ant, whale, turtle or ladybug?
    5·1 answer
  • Does anyone know what the 5√2 (simplify radicals)?
    7·1 answer
  • What is the correct answer?
    9·1 answer
  • This is confusing i need help ;-;
    15·2 answers
  • What go in the empty spots
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!