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Dmitry_Shevchenko [17]
2 years ago
5

4. Janet has 30 classmates in her classroom. 18 of those

Mathematics
1 answer:
boyakko [2]2 years ago
6 0

Answer:

300

Step-by-step explanation:

Let x represent number of girls.

18 girls / 30 students

x girls / 500 students

18/30 = x/500

x = 18/30 x 500

x= 300 girls

Therefore there are approximately 300 girls in the school.

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Pls help me I don’t understand this!!!!
kirill115 [55]

Answer: D

Step-by-step explanation:

D The angle agacent to arc ML is half the degree. Your answer is 118

6 0
3 years ago
Read 2 more answers
The height, s, of a ball thrown straight down with initial speed 32 ft/sec from a cliff 48 feet high is s(t) = –16t2 – 32t + 48,
aalyn [17]
Remember that w<span>hen the ball hits the ground, s(t) = 0 
</span><span>So we have: -16t^2 - 32t + 48 = 0 </span>
<span>It's time to determine t = (-(-32) +/- sqrt((-32)^2 - 4(-16)(48))) / (2(-16)) </span>
<span>t = (32 +/- sqrt(1024 + 3072)) / (-32) </span>
<span>t = (32 +/- sqrt(4096)) / (-32) </span>
<span>t = (32 +/- 64) / (-32) </span>
<span>t = (48 or -32) / (-32) </span>
<span>t = -1.5 or 1 </span>
<span>Since a negative number doesn't make sense, so t =1</span>
<span>Keep in mind that velocity is the derivative of the height, therefore: </span>
<span>s'(t) = -32t - 32 </span>
<span>s'(t) = -32*1 - 32 </span>
<span>s'(t) = -32 - 32 </span>
<span>s'(t) = -64 </span>
<span>So the answer 64 feet per second dwn</span>
8 0
3 years ago
Please write the explanation thanks
DedPeter [7]
\frac{7}{12}\cdot30=\frac{7}{2}\cdot5=\frac{35}{2}=\$17.5\leftarrow \hbox{ Joseph}\\&#10;30\%\cdot30=0,3\cdot30=\$9\leftarrow \hbox{ Maria}\\&#10;30-17.5-9=\$3.5 \leftarrow \hbox{ Rebecca}
3 0
3 years ago
The sum of x and y is eleven, their difference is five, what is the value of x and y?
REY [17]

Answer:

x = 8

y = 3

Step-by-step explanation:

x + y = 11

x - y = 5                     Subtract

2x = 16

x = 16/2

x = 8

x + y = 11                   Substitute x = 8

8 + y = 11                  Subtract 8 from both sides

8-8+y =11-8

y = 3    

5 0
3 years ago
49<br> a = 16, c= 20, b=
Vaselesa [24]

Answer:

b=13

Step-by-step explanation:

cause 16+20+13=49

4 0
4 years ago
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