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3 years ago

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.

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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

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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

You might be interested in

how many different four letter permutations can be formed using four letters out of the first 12 in the alphabet?

Verizon [17]

Answer:

11,800 different four letter permutations can be formed using four letters out of the first 12 in the alphabet

Step-by-step explanation:

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

$P_{(n,x)} = \frac{n!}{(n-x)!}$

In this question:

Permutations of four letters from a set of 12 letters. So

$P_{(12,4)} = \frac{12!}{(12-4)!} = 11800$

11,800 different four letter permutations can be formed using four letters out of the first 12 in the alphabet

3 0

2 years ago

Apply subtraction of intenges to a real world situation

luda_lava [24]

you have 59 coconuts and you only want 39, you can do 59-39 to see how many you need to get rid of. :)

5 0

2 years ago

There were 128 newspapers. Every 8newspapers were bundled together . How many bundles were there ?

Katarina [22]

divide

$128 \div 8$

5 0

2 years ago

4/3C, when C=6<br> show your work here

tresset_1 [31]

4 divided by 3C

If C equals 6, then the equation now looks like 4 divided by 3(6).

3 x 6 = 18.

4 divided by 18 is .22 repeating.

This may be wrong. Check with another answer.

6 0

2 years ago

Read 2 more answers

Find the midpoint of the line segment joining the points P1 and P2.

ludmilkaskok [199]

Formula for midpoint between two points is M(x,y)

x=(x1+x2)/2 and y=(y1+y2)/2

In our case (x1,y1)=(m,b) and (x2,y2)=(0,0)

x=(m+0)/2=m/2 and y=(b+0)/2=b/2 M(m/2,b/2)

Good luck!!!

7 0

2 years ago