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Butoxors [25]
3 years ago
11

A cafeteria manager needs to know how many apples and bananas to to order. He asked students to choose either an apple or a bana

na as their preferred fruit. The survey results know that of the students who responded, 7/10 picked apples. If 84 students picked apples, how many picked bananas?
Mathematics
1 answer:
shusha [124]3 years ago
5 0

Answer:

36

Step-by-step explanation:

The answer is easy to find if we use the cross-multiplication method.

We know 7 students out of 10 picked apples, then 3 out of 10 picked bananas.

We know the number of people who picked apples.

\frac{apples}{bananas} = \frac{7}{3} = \frac{84}{x}

We just have to isolate x, this way and solve the problem:

\frac{7}{3} = \frac{84}{x}

becomes

x = \frac{84 * 3}{7} = \frac{252}{7} = 36

So, 36 students picked bananas as their favorite fruit.

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The original price was $60 and the new sales price is $45. What is the percent discount?
cestrela7 [59]

Answer: 25%

Step-by-step explanation:

\frac{60}{45}=\frac{100}{x}

x=\frac{45*100}{60} \\x=75

Subtract 75% from 100%

100-75=25%

5 0
3 years ago
Read 2 more answers
Write the equation in the form Ax + By = C. Find an equation of a line passing through the pair of points (-7,3) and (-8,-9).
Illusion [34]

Answer:

  12x -y = -87

Step-by-step explanation:

You can start with the 2-point form of the equation of a line and manipulate it to give you the standard form.

  y = (y2 -y1)/(x2 -x1)(x -x1) +y1

  y = (-9 -3)/(-8 -(-7))(x -(-7)) +3

  y = (-12/-1)(x +7) +3

  y = 12x +84 +3

  -12x +y = 87 . . . . . subtract the x-term

  12x -y = -87 . . . . . . make the leading coefficient positive (per standard form)

3 0
3 years ago
What is the area of a square, if a side measures 12 cm?
Westkost [7]
Area of a square is length times by itself (length x width) so 12 cm x 12 cm
144cm squared
hope i helped :)
3 0
3 years ago
Can someone please help me?
VikaD [51]

Answer:

The answer is 27

Step-by-step explanation:

The reason being, you can solve this 2 ways.

1) Combine like terms, 7a-4a = 3a.

Now just substitute (a=9) into 3a.

3 * (9) = 27.

2) Or just substitute a = 9 into the original expression.

7 * (9) - 4 * (9)

= 63 - 36 = 27

4 0
3 years ago
Read 2 more answers
A fair-sided coin is tossed 18 times.
Lady bird [3.3K]
Most likely to be letter C
5 0
3 years ago
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