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
finlep [7]
2 years ago
7

-5 x + 10 equals 55 what is X ​

Mathematics
2 answers:
Jobisdone [24]2 years ago
8 0

Answer:

Step-by-step explanation:

I think it’s x=-9

sladkih [1.3K]2 years ago
4 0

Answer:

x=-9

Step-by-step explanation:

-5x+10=55

Solve for x by isolating the variable. Subtract 10 from both sides:

-5x+10-10=55-10\\\\-5x=45

Divide both sides by -5:

\frac{-5x}{-5}=\frac{45}{-5}  \\\\x=-9

:Done

You might be interested in
Pls help will mark brainlest
kari74 [83]

Answer:

15 bags

Step-by-step explanation:

She can fill 5 bags per each pound (because there are 5 \frac{1}{5}ths per pound)

Since there are 3 pounds, and , again, each pound can fill 5 bags, she will need 15 bags.

Another way too look at it is to ask how many 1/5ths are in 3 pounds. To find this answer mathematically:

3 ÷ 1/5 = 15 because when we divide by a fraction, we need to flip it and then multiply (so 3 ÷ 1/5 is actually 3×5)

7 0
3 years ago
Flow meters are installed in urban sewer systems to measure the flows through the pipes. In dry weatherconditions (no rain) the
ziro4ka [17]

Answer:

a) \frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}

363.90 \leq \sigma^2 \leq 4430.80

Now we just take square root on both sides of the interval and we got:

19.08 \leq \sigma \leq 66.56

b) For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

Step-by-step explanation:

423.6, 487.3, 453.2, 402.9, 483.0, 477.7, 442.3, 418.4, 459.0

Part a

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case we need to find the sample standard deviation with the following formula:

s=sqrt{\frac{\sum_{i=1}^8 (x_i -\bar x)^2}{n-1}}
And in order to find the sample mean we just need to use this formula:
[tex]\bar x =\frac{\sum_{i=1}^n x_i}{n}

The sample deviation for this case is s=30.23

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=9-1=8

The Confidence interval is 0.98 or 98%, the value of \alpha=0.02 and \alpha/2 =0.01, and the critical values are:

\chi^2_{\alpha/2}=20.09

\chi^2_{1- \alpha/2}=1.65

And replacing into the formula for the interval we got:

\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}

363.90 \leq \sigma^2 \leq 4430.80

Now we just take square root on both sides of the interval and we got:

19.08 \leq \sigma \leq 66.56

Part b

For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

4 0
3 years ago
) A store is having a 30% off sale. Michelle uses the expression 0.7p and Stuart uses the expression p-0.3p. Who is using the co
Aleonysh [2.5K]

Answer:michelle

Step-by-step explanation: it is 70% of the cost since it’s 30% of the original

3 0
2 years ago
Dee's clothing is having a discount of 40% on all shirts. Let x represent the regular price of any shirt in the store. Write an
Elis [28]
Y=0.40x because the sale which is 40% off would be on x amount of shirts
4 0
3 years ago
An exploring ship is pulling up a diver at the rate of 25 feet per minute. The diver is currently 100 feet below sea level. How
Allushta [10]
The answer is ur mom
4 0
2 years ago
Other questions:
  • a fountain that is 5 feet tall sprays water into the air withan upward velocity of 22ft/s. What function gives the height h of t
    8·1 answer
  • 0.12 divided by 5? Please explain the steps.
    11·2 answers
  • Can anyone pls help me in this pls
    7·2 answers
  • Plz solve for the area, questions 10,11,and 12 plz
    13·1 answer
  • Find the midpoint of the line segment joining points A(6,-5) and B(,6,1)
    10·2 answers
  • Finance. Suppose that $ 3 comma 400 is invested at 4.4 % annual interest​ rate, compounded monthly. How much money will be in th
    6·1 answer
  • You are a state inspector for the Division of Weights and Measures. Your responsibility is to be sure the net weight found on al
    12·1 answer
  • Solve for t. d= -16t^2 + 12
    14·1 answer
  • BERE
    8·2 answers
  • Value of the digit 3 for 263 is​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!