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Mars2501 [29]
2 years ago
5

Christopher surveyed 30 students about their favorite type of pet. The results are shown in the table.

Mathematics
1 answer:
MariettaO [177]2 years ago
6 0

Answer:

well it will be 20 cuz 0 + 20 = 20

Step-by-step explanation:

skduamefmkaska

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Is the triangle obtuse, acute, equilateral or right?
Stells [14]

9514 1404 393

Answer:

  obtuse

Step-by-step explanation:

The law of cosines tells you ...

  b² = a² +c² -2ac·cos(B)

Substituting for a²+c² using the given equation, we have ...

  b² = b²·cos(B)² -2ac·cos(B)

We can subtract b² to get a quadratic in standard form for cos(B).

  b²·cos(B)² -2ac·cos(B) -b² = 0

Solving this using the quadratic formula gives ...

  \cos(B)=\dfrac{-(-2ac)\pm\sqrt{(-2ac)^2-4(b^2)(-b^2)}}{2b^2}\\\\\cos(B)=\dfrac{ac}{b^2}\pm\sqrt{\left(\dfrac{ac}{b^2}\right)^2+1}

The fraction ac/b² is always positive, so the term on the right (the square root) is always greater than 1. The value of cos(B) cannot be greater than 1, so the only viable value for cos(B) is ...

  \cos(B)=\dfrac{ac}{b^2}-\sqrt{\left(\dfrac{ac}{b^2}\right)^2+1}

The value of the radical is necessarily greater than ac/b², so cos(B) is necessarily negative. When cos(B) < 0, B > 90°. The triangle is obtuse.

4 0
3 years ago
Read 2 more answers
PLEASE HELP ME IN MATH
maks197457 [2]

Answer:

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Step-by-step explanation:

Please see the attached picture for full solution.

6 0
2 years ago
Ming rented a bike from Ted's Bikes. It cost $13 plus $3 per hour. If Ming paid $31,
NeX [460]

Answer:

C, 6

Step-by-step explanation:

31-13 is 18, 18/3 is 6.

8 0
3 years ago
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Omar is born weighing 8 pounds,3 ounces.The doctor says he should gain a about 5 ounces each week for the next 4 weeks.How much
hoa [83]
Start weight- 8.03
week 1 - 8.8
week 2 - 8.13
week 3 - 9.03
week 4 - 9.08

So, the Omar should weigh 9 pounds 8 ounces by the end of 4 weeks.

I hope this helped!
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3 years ago
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Jeremiah mows his yard every week. On the first week of the month, it took 136 minutes to mow
Leno4ka [110]
It increased just subtract it that u will he’s y answer
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3 years ago
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