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timama [110]
3 years ago
15

Need help with these 3 questions (giving brainiest if you can answer with equations)

Mathematics
1 answer:
Tpy6a [65]3 years ago
8 0

Problem 10

<h3>Answer: approximately 57.39159 km</h3>

Explanation: You'll use the equation cos(28) = d/65 to solve for d to get d = 65*cos(28) = 57.39159 approximately. We use the cosine ratio because it ties together the adjacent and hypotenuse.

=====================================

Problem 11

<h3>Answer: approximately 10.46162 meters </h3>

Explanation: This time we use the sine rule. We have the height as the opposite side (which is unknown, call it x) and the hypotenuse is the ladders length (11). So we have sin(72) = x/11 which solves to x = 11*sin(72) = 10.46162

=====================================

Problem 12

<h3>Answer: approximately 16.05724 cm</h3>

Explanation: Now we use the tangent rule to connect the opposite and adjacent sides.

tan(37) = 12.1/x

x*tan(37) = 12.1

x = 12.1/tan(37)

x = 16.05724 approximately

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What is nine times what equals 513
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Answer:

57

Step-by-step explanation:

How I did this was 513 divided by 9 so the equation that I did was 513/9.

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Anyone?? Tbh I’m actually having trouble with this question.
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How many solutions does the system of equations have?
Nana76 [90]
One solution x = 1, y = 4
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2 years ago
Can someone please help I am stuck. will give brainliest.​
AlekseyPX

Answer:

D

Step-by-step explanation:

(a^{m})^{n}= a^{m*n}\\\\\\(\frac{3^{4}}{7^{3}})^{3}=\frac{(3^{4})^{3})}{(7^{3})^{3}}\\\\=\frac{3^{3*4}}{7^{3*3}}\\\\=\frac{3^{12}}{7^{9}}

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3 years ago
33762 to the nearest thousand?
Reil [10]

Answer:

34,000

179,400

39,900

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In the number 33,762, the 3 is in the thousands place, so we look to the number behind it. If it is less than 5, we round down, and if it is more than 5 we round up.

Since 7 is more than 5, we round up, so our rounded number would be

34,000

Let’s use this logic for the rest of these numbers

179,406

4 is in the hundreds

Previous number in 0 which is less than 5, so it rounds down

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9 is in the tens place

Previous number is 4 which is less than 5, so it rounds down

39,990

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