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
AleksandrR [38]
2 years ago
5

Isolate for r, d = 2r

Mathematics
1 answer:
e-lub [12.9K]2 years ago
5 0

Answer:

D/2=r

Step-by-step explanation:

Since we want r to be by itself what we can do is divide 2 on both sides so 2 can cancel out on 2r and when you divide on both sides your left with d/2=r

You might be interested in
Si el gerente de control de calidad desea estimar la media de vida de lámparas con 20 horas, con un nivel de confianza del 95% y
vfiekz [6]

English translation:

If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?

6 0
3 years ago
The sum of 2 number is 42 and when you switch the order the difference is 5
Ksivusya [100]
So, x + y = 42 and y - x = 5;
Then, y = x + 5;
Finally, x + x + 5 = 42;
2x + 5 = 42;
2x = 37;
x = 18.5;
y = 18.5 + 5;
y = 23.5;
4 0
3 years ago
an electrition charged $70 for 2 hours of work and 115 for 5hours of work write an equtionto find the cost for y and xk
Westkost [7]

\bf \begin{array}{ccll} \stackrel{x}{hours}&\stackrel{y}{cost}\\ \cline{1-2} 2&70\\ 5&115 \end{array}~\hspace{10em}(\stackrel{x_1}{2}~,~\stackrel{y_1}{70})\qquad (\stackrel{x_2}{5}~,~\stackrel{y_2}{115}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{115-70}{5-2}\implies \cfrac{45}{3}\implies 15


\bf \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-70=15(x-2)\implies y-70=15x-30 \\\\\\ y=15x+40\impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}


as you already know, a direct proportional variation has a constant of variation "k", y = kx, which in this case that'd be the slope, namely 15.

7 0
3 years ago
PLEASE HELP
Vladimir [108]

Answer:

5.5 inches

Step-by-step explanation:

1) the formula to find the area of a square is l^2= area and l=length

in this case we already know the area but not the length

so we have to find the square root of 30 as the opposite operation needs to be used to find the missing number

so

√30= 5.47

5.47 rounded= 5.5

the length of one side is 5.5 in

5 0
3 years ago
Ostuni evaluated -4 + x for x = -9 1/2 and got an answer of 5 1/2. What might the student have done wrong?
Sav [38]
The student added 9 1/2 instead of adding -9 1/2
8 0
3 years ago
Other questions:
  • The mean age of five children is 8 years
    12·2 answers
  • 5 times a number less 7 is equal to 7 times the number plus 13. Find the number
    8·2 answers
  • Seven more than twice a number is 17
    10·1 answer
  • How many 1 x 1 inch square tiles IH <br>will fit in an 8 x 8 inch square<br>tile? Draw.​
    14·1 answer
  • 16 is 25% of what number
    14·2 answers
  • Use the Commutative Property and compatible numbers to calculate the sum. Explain how you used mental math. 23. 3 + 36. 7
    6·1 answer
  • to shift the graph of an equation some numbers of units to the ___, you add that number to each graph
    8·2 answers
  • You have to find the value of k
    7·1 answer
  • !! IMAGE ATTACHED &amp; 30 POINTS !!
    14·1 answer
  • What is a quarter to eight<br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!