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murzikaleks [220]
3 years ago
11

Sally’s dance school had 60 students last year. This year there are only 48 students enrolled. By what percent did the enrollmen

t decrease?
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
8 0

Answer:

-20%

My brain is weird on how i figure it out but I divided 48 by 60 and got .80 so i just got the other whole to make it 1 so it is 20%. This is not the correct way to do this but this is how i got my answer.

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4. A store had 86 DVDs and 52 CDs. When the equal number of DVDs and CDs were sold,
11Alexandr11 [23.1K]

Answer:

51 DVDs

Step-by-step explanation:

Let the number of DVDs and CDs sold be x each.

<u>Initial</u>

Number of DVDs= 86

Number of CDs= 52

<u>After selling</u>

Number of DVDs= 86 -x

Number of CDs= 52 -x

Given that there are 3 times as many DVDs than CDs left,

86 -x= 3(52 -x)

<em>Expand:</em>

86 -x= 156 -3x

<em>Bring x terms to 1 side, constant to the other:</em>

3x -x= 156 -86

<em>Simplify:</em>

2x= 70

<em>Divide both sides by 2:</em>

x= 35

Amount of DVDs left

= 86 -x

= 86 -35

= 51

3 0
3 years ago
For the function f(x) = 3x-11, identify the range for f(6), f(7), and f(11)
aalyn [17]

Answer:

f(6)= 7        f(11)= 22

f(7)= 10  

Step-by-step equation:

f(6)= 3(6)-11  = 7\\f(7)= 3(7)-11  = 10\\f(11)= 3(11)-11  = 22

4 0
3 years ago
Read 2 more answers
In 2012 Staci invested $14,500 in a savings account for her newborn son. The account pays 3.6% interest each year. Determine the
s2008m [1.1K]

Answer: $23,896

Step-by-step explanation:

In the year 2030, the number of years since the investment would be;

= 2030 - 2012

= 18 years.

As the question does not mention that the interest paid is compounded, simple interest will be used;

= Amount + (Amount * interest rate * number of years).

= 14,500 + ( 14,500 * 0.036 * 18)

= $23,896

6 0
3 years ago
In △ABC,a=11 , b=20 , and c=28 . Find m∠A .
Helga [31]

Answer:

18.4°

Step-by-step explanation:

Use law of cosine.

a² = b² + c² − 2bc cos A

11² = 20² + 28² − 2(20)(28) cos A

121 = 1184 − 1120 cos A

cos A = 0.949

A = 18.4°

4 0
3 years ago
-4x11y=15<br> x=24<br> x=<br> y=
ira [324]

Answer:

5/352

Step-by-step explanation:

-4x11y=15

-4*24 * 11y=15

I think

7 0
3 years ago
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