What are the first four terms in the sequence Tn=4n+9?

1 answer:

6 0

Answer: If the initial term of an arithmetic sequence is a 1 and the common difference of successive members is d, then the nth term of the sequence is given by: a n = a 1 + (n - 1)d The sum of the first n terms S n of an arithmetic sequence is calculated by the following formula: S n = n (a 1 + a n)/2 = n [2a 1 + (n - 1)d]/2

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4. A ship travels due east at 10 mph for 5 hrs. It then turns on to a bearing 36° and continues for another 2 hrs. How far is it

Mama L [17]

Answer:

35.8miles

Step-by-step explanation:

The scalene triangle is a type of triangle with sides of three different lengths and angles of three different measurements. In every scalene triangle, the shortest side is opposite the smallest angle and the longest side is opposite the largest angle

10 mph x 5hrs = 50 miles could be the longest side

+36 degree = 1/10 of full rotation, is likely to be opposite the smallest angle =20 degree opposite 20miles but we deduct 1/10 rotation to show 1/10 of 20 is 0.8 x 0.8 = 0.64 and is the inverse 1/10 of 36 degree.

We use trigonometry function the sine of the angle = the length of the opposite side. the length of the hypotenuse = 20/50 sin (30)= 1.25 and this estimates the larger angle 125

We find 35.8m through division.

We can check that 35.8 + 20 + 50 = 105.804 perimeter

We cna also multiply the radical adding -1 infront of the angle 36 and multiplifyling the scale of 5 and 2 = 2.5

2.17874 x -136 x 2.5 = -741

1800-741 = 1058/10 perimeter.

and each has angle 36, 124.8, 19.2

4 0

4 years ago

Which statements are true? Check all that apply.

viva [34]

Answer:

1,2,3,4 and 6.