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zhenek [66]
4 years ago
6

A random sample of 30 seventh grade students shows that 12 of them own a dog. How many seventh grade students can you predict ow

n a dog if the entire population of seventh graders is 400?
Mathematics
2 answers:
ArbitrLikvidat [17]4 years ago
4 0

Answer:

160

Step-by-step explanation:

If out of 30 7th graders, 12 own a dog then when you have 400 of them, 160 will have a dog as well.

The way I did this was by 400/30: which was 13.3 repeating. I then mutliplied this number by 12, to find the final answer of 160.

otez555 [7]4 years ago
3 0

Answer:

160

Step-by-step explanation:

proportion: 12/30 = 0.4

0.4 × 400

160

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The formula for a trapezoid relates the area A, the two bases, a and b, and the height, h. A=(a+b)/2 h Solve for a.
yKpoI14uk [10]

Answer:

a=\frac{2A}{h}-b

Step-by-step explanation:

Hello, I think I can help you with this.

According to the information provided in the problem, the area of ​​a trapezoid is given by

A=\frac{a+b}{2} *h\\

Step 1

solve for a, it means isolate a

A=\frac{a+b}{2} *h\\divide\ both\ sides\ by\ h\\\\\frac{A}{h}= \frac{\frac{a+b}{2} *h}{h} \\\frac{A}{h}=\frac{a+b}{2}\\\\Now, multiply\ both\ sides\ by\ two\\\\ 2*\frac{A}{h}=2*\frac{a+b}{2}\\2*\frac{A}{h}=a+b\\\frac{2A}{h}=a+b\\\\subtract\ b\ for\ both\ sides\\\frac{2A}{h}-b=a+b-b\\a=\frac{2A}{h}-b

Have a good day.

5 0
3 years ago
Tessellations
OLga [1]

Answer:

B. No

Step-by-step explanation:

I calculated it logically

6 0
3 years ago
Pls help I’ll brainlest and add extra points
soldier1979 [14.2K]

Answer:

You can use a website called

Step-by-step explanation:https://www.dcode.fr/music-sheet

7 0
3 years ago
The Powerball lottery is open to participants across several states. When entering the powerball lottery, a participant selects
mr Goodwill [35]

Answer and Step-by-step explanation:

Number of ways = 59C5 × 35= 59!/(54!*5!)* 35= 175223510

Odds are thus 1 in 175223510

b) 1 million - Number of ways = 59!/(54!*5!) =5006386*35/34 = 5153632

Odds are thus 1 in 5153632

6 0
4 years ago
What’s the value of x in the parallelogram
Vedmedyk [2.9K]

Answer:

145 degrees

Step-by-step explanation:

I'd say that because if it were 135, it would have to be bigger than a right angle and it also isn't a right angle so it has to be acute or less than 90 degrees

Hope this helps!!:)

4 0
3 years ago
Read 2 more answers
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