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Finger [1]
3 years ago
13

What is the sum of the first 19 terms in the arithmetic sequence 3+7+11+...

Mathematics
2 answers:
aivan3 [116]3 years ago
6 0
3,7,11,15,19,23,27,31,35,39,43,47,51,55,59,63,67,71,75 

You plus 4 every time.
Hope this helped :)
kupik [55]3 years ago
4 0
The sum of the first 19 terms is 3+7+11+15+19+23+27+31+35+39+43+47+51+55+59+63+67+71+75= 741
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Write the equation of the line parallel to the y axis at a distance of 7 units form it to is left​
Finger [1]

Answer:

x = -7

Step-by-step explanation:

Two parallel lines are lines that never intersect each other.

The y-axis can be written as x = 0.

Then if we want a parallel line to this one, it must be something like x = b

such that b ≠ 0.

Now we want that the distance between our line and the line x = 0 is 7 units to the left

(remember that the left is the negatie side of the axis)

then we can write:

b - 0 = -7

b = -7

The parallel line is x = -7

6 0
3 years ago
Given the triangle below, find the angle in radians. <br>Round to four decimal places.<br>​
Lera25 [3.4K]

Answer:

1.1071

Step-by-step explanation:

tan  θ = opposite/adjacent = 10/5 = 2

arctan(2) = 1.1071

7 0
3 years ago
An awning is in the form of an arc 6 inches high and 72 inches wide. Find the radius of the circle containing the arc.
Ainat [17]

Answer:

  • 111 in

Step-by-step explanation:

Let the remainder of the diameter is x.

<u>Use the intersecting chords theorem:</u>

  • 6*x = (72/2)*(72/2)
  • 6x = 1296
  • x = 216

<u>The diameter:</u>

  • d = 6 + x = 6 + 216 = 222 in

<u>The radius:</u>

  • r = 222/2 = 111 in

3 0
3 years ago
A regular hexagon has an apothem measuring 14 cm and an approximate perimeter of 96 cm.
WINSTONCH [101]
Given:
hexagon
apothem of the hexagon: 14 cm
perimeter of the hexagon: 96 cm

Area of the hexagon = [(3√3) / 2] a²     ; where a is the measure of the side

hexagon has 6 sides.

Perimeter = 6a
96 cm = 6a
96 cm / 6 = a
16 = a

We can also use the area of a triangle to approximate the area of the hexagon. There are 6 triangles in the hexagon .

Area of a triangle = (height * base) / 2
A = (14 cm * 16 cm) / 2
A = 224 / 2 
A = 112 cm²

112 cm²  * 6 triangles = 672 cm²
4 0
4 years ago
Read 2 more answers
Y varies jointly as x and z, and y = 32 m, x = 6 m, and z = 8 m. what is the value of y when x = 5 m and z = 12 m?
Fynjy0 [20]
As x = 5 & z=12, 

<span>2/3 = y /(xz) = y/(5*12) </span>

<span>= y/60 </span>

<span>so y / 60 = 2/3 </span>

<span>y = (2*60)/3 </span>

<span>= 40</span>
4 0
4 years ago
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