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
Mila [183]
3 years ago
7

30=7r+5 what’s does r stand for

Mathematics
2 answers:
harkovskaia [24]3 years ago
7 0

Answer:

An unknown variable

Step-by-step explanation:

r is an unknown variable -> the equation is used to solve for it.

kodGreya [7K]3 years ago
3 0

Answer:

In math, r usually stands for radius.

Step-by-step explanation:

You might be interested in
Passes through the point (0,6) and has a slope of -2/3
Vadim26 [7]

Answer:

y=-\frac{2}{3}x + 6

Step-by-step explanation:

We are given that a line has a slope of -2/3 and passes through the point (0,6)

We want to write the equation of this line; there are 3 forms of the line that we can use:

  • Slope-intercept form, which is y=mx+b, where m is the slope and b is the y intercept
  • Standard form, which is ax+by=c, where a, b, and c are free integer coefficients, but a and b cannot be 0, and a cannot be negative
  • Slope-point form, which is y-y_1=m(x-x_1), where m is the slope and (x_1, y_1) is a point

All though while writing the equation of the line in any of these ways is acceptable, the most common way is to write it in slope-intercept form, so let's do it that way.

As we are already given the slope, we can immediately substitute m with that value.

Replace m with -2/3:

y = -2/3x + b

Now we need to find b.

As the equation passes through the point (0, 6), we can use it to help solve for b.

Substitute 0 as x and 6 as y.

6 = -2/3(0) + b

Multiply

6 = 0 + b

Add

6 = b

Substitute 6 as b.

y = -2/3x + 6

Topic: finding the equation of the line

See more: brainly.com/question/27645158

8 0
2 years ago
To reduce laboratory​ costs, water samples from five public swimming pools are combined for one test for the presence of bacteri
aleksklad [387]

Answer:

Step-by-step explanation:

Given that:

The numbers of the possible public swimming pools are 5

From past results, we have 0.007 probability of finding bacteria in a public swimming area.

In the public swimming pool, the probability of not finding bacteria = 1 - 0.007

= 0.993

Thus;

Probability of combined   =  Probability that at least one public

sample with bacteria           swimming area have bacteria

Probability of combined sample with bacteria  = 1 - P(none out of 5 has          

                                                                                bacteria)

   

Probability of combined sample with bacteria = 1 - (0.993)⁵        

= 1 - 0.9655

= 0.0345

Thus, the probability that the combined sample from five public swimming areas will show the presence of bacteria is 0.0345

From above, the probability that the combined sample shows the presence of bacteria is 0.0345 which is lesser than 0.05.

Thus, we can conclude that;  Yes, the probability is low enough that there is a need for further testing.

6 0
3 years ago
One day, Fiona and Heidi each bought coins at a coin shop. The equation f(x)=3x+12 represents the value of Fiona’s coin, in doll
Dvinal [7]
1 a
2b
3b
This is the Sancerre I got
5 0
3 years ago
Read 2 more answers
What is the measure of ∠ABC?
____ [38]

Answer:

not sure

Step-by-step explanation:

I'm not sure how to do this guys I am very sorry for the inconvenience

5 0
3 years ago
Read 2 more answers
PLEASE HELP,, MARKING BRAINLIEST!!!<br><br> Solve for the value of x.
iris [78.8K]

Answer:

\huge\boxed{\sf x = 37}

Step-by-step explanation:

We know that,

The sum of interior angles of a triangle is 180 degrees.

So,

2x + 4 + 2x - 9 + x = 180

5x - 5 = 180

Add 5 to both sides

5x = 180 + 5

5x = 185

Divide both sides by 5

x = 185 / 5

x = 37

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
3 0
3 years ago
Other questions:
  • Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator.
    8·1 answer
  • JOJO help me I can't work good
    15·2 answers
  • A rectangular sheet of paper had a width of 841 millimetres.
    11·1 answer
  • Does the area of a square vary with the side length?
    13·1 answer
  • 2
    6·1 answer
  • URGENT PLEASE HELP‼️‼️
    8·1 answer
  • A factory produces 272 chairs in an 8 hour shift. If the factory produces the same number of chairs each hour, how many chairs d
    10·1 answer
  • Find the value of x such that the data set has the given mean.
    11·1 answer
  • Answer this question!!! :)
    15·2 answers
  • Can someone please help me with this
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!