Ask question

Ask question

All categories

3 years ago

11

Your class has 26 students, which represents 5% of your school's enrollment. Your friend uses the proportion 5/100 =n/26 to find

the number of students in your school . Explain your friend's error? Can you guys please help me on this problem. By the way the / is a fraction. Thanks!

1 answer:

dedylja [7]3 years ago

7 0

26 is a part of the whole. the proportion should be set up:

(26/x) = (5/100) It's the overall enrollment that is being asked.

If you also need to solve: Cross multiply, 26(100) = 5x, 2600 = 5x, divide both sides by 5, 520 is the enrollment

You might be interested in

SOMEONE PLEASE HELP!! I've tried this question twice and I just can't seem to get it

jolli1 [7]

$\underline{\underline{\large\bf{Given:-}}}$

$\red{\leadsto}\:$ $\textsf{Total Number of fish }$ $\sf = 30$

$\red{\leadsto}\:$ $\textsf{ Number of carp fish }$ $\sf = 9$

$\underline{\underline{\large\bf{To Find:-}}}$

$\orange{\leadsto}\:$ $\textsf{ Ratio of carp to sticklebacks to tench }$ $\sf in \:the \:pond$

$\\$

$\underline{\underline{\large\bf{Solution:-}}}\\$

$\longrightarrow$ Number of fish that are not carp = Total fish - number of carp fish

$\begin{gathered}\implies\quad \sf 30-9 \\\end{gathered}$

$\begin{gathered}\implies\quad \sf 21 \\\end{gathered}$

$\longrightarrow$ Since 1/3 of remaining fish which are not carp are sticklebacks , Number of sticklebacks =

$\begin{gathered}\implies\quad \sf \frac{1}{3} \times number \:of \:remaining \: fish\\\end{gathered}$

$\begin{gathered}\implies\quad \sf \frac{1}{3}\times 21 \\\end{gathered}$

$\begin{gathered}\implies\quad \sf 7 \\\end{gathered}$

<u>Now</u> ,

$\longrightarrow$ Number of tench = Total number of fish - (Number of carp + Number of sticklebacks)

$\begin{gathered}\implies\quad \sf 30-(9+7) \\\end{gathered}$

$\begin{gathered}\implies\quad \sf 30-16\\\end{gathered}$

$\begin{gathered}\implies\quad \sf 14\\\end{gathered}$

$\therefore$ Ratio of carp to sticklebacks to tench in the pond =

$\begin{gathered}\quad\quad \boxed{\sf {9: 7:14}} \\\end{gathered}$

3 0

2 years ago

PLZZZ HELP DOES ANYONE KNOW HOW TO DO THIS?!?!?<br> Find x and y

yanalaym [24]

According to the figure, I can safely assume that the 10 cm line and 15 cm line are parallel.

Thus, there are two similar triangles, one with the 10 cm bottom and 15 cm bottom, where one triangle is larger by a factor of 15/10 = 3/2

We know that the 8 cm line segment and y both join to create the side of the large triangle.

8cm + y = the side of the large triangle

Multiplying 8cm by 3/2 gives us 12, since we know the large triangle is 3/2 times larger than the smaller one.

8 + y = 12

y = 4 cm

Finding x is going to be a bit different. We know that the 6 cm line and x form the side of the larger triangle, which we know is 3/2 times larger than x.

x + 6cm = ?

The side of the larger triangle is 3/2x, thus

x + 6 = 3/2 x

Subtract both sides by x

6 = 1/2 x

Multiply both sides by 2

12 cm = x

Thus, y = 4 and x = 12.

Let me know if you need any clarifications, thanks!

3 0

3 years ago

It takes Miranda 30 minutes to paint 6 chairs. If Miranda paints at a constant rate, what is the constant of proportionality tha

Stells [14]

Answer:

1/5

Step-by-step explanation:

y = kx where k is the constant of proportionality

6 = k 30

Divide each side by 30

6/30 = k 30/30

1/5 = k

The constant is 1/5

6 0

4 years ago

Which fraction is equivalent to seventy-five hundrths?Three fourths,three sixths,one third,orone fourth

jolli1 [7]

Three forths (75%, 0.75, 3/4)

3 0

3 years ago

3 square root of 1/125

zimovet [89]

Answer:

1/5 or 0.2

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers