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netineya [11]
3 years ago
5

Half of the students in Max's class volunteer at the local community center. Fifteen students do not volunteer. If there are 12

boys in Max's class,how many girls are in his class?
Mathematics
2 answers:
alexdok [17]3 years ago
7 0

Answer: X=18

Step-by-step explanation:

let the numbers of girls be X

total in class = X + 12

number of students who do not volunteer

= (x + 12)/2

but this is 15

(x+12)/2 = 15

x+12 = 30

x = 18

So there are 18 girls in the class.

<h3>I hope this helped :)  </h3>

xxTIMURxx [149]3 years ago
5 0
18
because 15 * 2 = 30; 30 - 12=18


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The value of Adam's model railway is $550.
garik1379 [7]

Answer:(c)

Step-by-step explanation:

Given

The initial value of Adam's model is A_o=\$550

the value increases exponentially with the rate of r\%

Time period t=5\ years

Final amount A=\$736

Exponential growth is given by

\Rightarrow A=A_o(1+r)^t

Putting values

\Rightarrow 736=550(1+r)^5\\\\\Rightarrow (1+r)^5=1.338

\Rightarrow 1+r=1.05999\\\Rightarrow r=0.05999\ or\ 5.99\%\approx 6\%

Option (c) is correct

6 0
3 years ago
Simplify the linear expression
vekshin1

Answer:

\huge\boxed{-\frac{7}{8}a - \frac{1}{6}}

Step-by-step explanation:

This question utilizes combining like terms and common denominators. First you have to convert both terms including "a" to have a denominator of 8. You would do this by multiplying both the numerator, and the denominator by the same value. This value in the case of -\frac{1}{4} a would be 2, and in the case of \frac{2}{3} the value would be 2. This would result in the equation: -\frac{5}{8}a+\frac{4}{6}-\frac{2}{8}a-\frac{5}{6}. Then simply combine like terms to get your final answer.

5 0
2 years ago
From the set {80, 19, 11}, use substitution to determine which value of x makes the equation true. 8x = 88 A. none of these B. 1
mel-nik [20]

Answer:

  C.  11

Step-by-step explanation:

Substituting, we have ...

  8{80, 19, 11} ?= 88

  {640, 152, 88} ?= 88

The value from the set that makes the equation true is x = 11.

_____

<em>Alternate methods of solution (other than substitution)</em>

It can be easier to make use of your knowledge of factoring:

  8x = 8·11

  x = 11

Or to make use of your knowledge of numbers (place value):

  8·10 = 80

so x will not be very different from 10.

3 0
3 years ago
-11 , -15, -19 is an arithmetic sequence <br> Find the nth term of the sequence
pochemuha

Answer:-47


Step-by-step explanation:

1# 11+4=15

2# 15+4=19

3# 19+4=23

4# 23+4=27

5# 27+4=31

6# 31+4=35

7# 35+4=39

8# 39+4=43

9# 43+4=47

REMEBER its negative not positive.



6 0
3 years ago
What is 5 times 6 and 1/3
Kitty [74]
The answer is...95/3...or 31.67
4 0
2 years ago
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