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
NARA [144]
1 year ago
10

Hi I need help

Mathematics
2 answers:
Nonamiya [84]1 year ago
7 0

<u>Equation #1</u>:

  • -15+4r=-9

We move all terms to the left:

-15+4r-(-9)=0

We add all the numbers together, and all the variables

4r-6=0

We move all terms containing r to the left, all other terms to the right

4r=6

r=6/4

r=1+1/2

<u>Equation #2</u>:

  • 5-y/3=-1

We move all terms to the left:

5-y/3-(-1)=0

We add all the numbers together, and all the variables

-y/3+6=0

We multiply all the terms by the denominator

-y+6*3=0

We add all the numbers together, and all the variables

-1y+18=0

We move all terms containing y to the left, all other terms to the right

-y=-18

y=-18/-1

y=+18

<u>Equation #3</u>:

Simplifying

42 = 5x + -8

Reorder the terms:

42 = -8 + 5x

Solving

42 = -8 + 5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5x' to each side of the equation.

42 + -5x = -8 + 5x + -5x

Combine like terms: 5x + -5x = 0

42 + -5x = -8 + 0

42 + -5x = -8

Add '-42' to each side of the equation.

42 + -42 + -5x = -8 + -42

Combine like terms: 42 + -42 = 0

0 + -5x = -8 + -42

-5x = -8 + -42

Combine like terms: -8 + -42 = -50

-5x = -50

Divide each side by '-5'.

x = 10

Simplifying

x = 10

NNADVOKAT [17]1 year ago
3 0

Step-by-step explanation:

hope it's beneficial.

Draw my attention for further explanations.✨✨

You might be interested in
Help me with C number please. Show me how did you do that. It’s due in 30 minutes.
Paha777 [63]
I’m not 100% sure but isn’t it x2 +xy +y2?
6 0
3 years ago
Read 2 more answers
Help! Please!! Its Algebra 1 american school.
Anarel [89]
I dont know if im right, but Ill take a shot at it. in the table 0 is 1, 1 is 5, 2 is 21, and 3 is 95.  Hope this helps..
8 0
3 years ago
Read 2 more answers
Look at the table below.
GenaCL600 [577]

Answer:04

Step-by-step explanation:

5 0
3 years ago
An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 2 of 2 : S
ziro4ka [17]

Answer:

The 85% onfidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.151, 0.205).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

Sample of 421 new car buyers, 75 preferred foreign cars. So n = 421, \pi = \frac{75}{421} = 0.178

85% confidence level

So \alpha = 0.15, z is the value of Z that has a pvalue of 1 - \frac{0.15}{2} = 0.925, so Z = 1.44.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 - 1.44\sqrt{\frac{0.178*0.822}{421}} = 0.151

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 + 1.44\sqrt{\frac{0.178*0.822}{421}} = 0.205

The 85% onfidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.151, 0.205).

8 0
2 years ago
If the Weight of Candy Is proportional to the price and 12 ounces of candy is $3.00,dollars how much is 20 ounces of candy?
FinnZ [79.3K]

Answer:

$5.00

Step-by-step explanation:

if you divide $3.00 by 12 you get $0.25 which is what your paying per ounce so all you would have to do once you get how much your paying per ounce is multiply your per ounce number ($0.25) by your total amount of ounces (20) and you then get your answer $5.00. Hope this makes sense!

4 0
3 years ago
Other questions:
  • Which equation represents the volume of a cone with the same base and height as the cylinder below?
    15·1 answer
  • If p(a|b) = 0.40 and p(b) = 0.30, find p(a ∩ b). .171 .525 .571 .120
    13·1 answer
  • The area (A) of a circle with a radius of r is given by the formula and its diameter (d) is given by . Arrange the equations in
    7·1 answer
  • Brenda says that the negative of 1/3 is 3. because on the opposite sides of the zero if a number line is drawn. Is it true what
    7·1 answer
  • Can someone hep me on this
    5·1 answer
  • 99 POINTS TO ANSWER AWARDING BRAINLIEST
    15·2 answers
  • Rosalyn worked 44 hr one week and earned a ​$989 paycheck. she earnsnbsptime and a half ​(1.5 times her regular hourly​ wage) fo
    8·1 answer
  • Please help me fast am stuck<br>​
    13·1 answer
  • How can your establish credit?
    9·1 answer
  • Any helpers?( it’s talking about the blue dot )
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!