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netineya [11]
2 years ago
14

How many terms of the arithmetic series 3+9+15.... will add up to 19200?​

Mathematics
1 answer:
Olenka [21]2 years ago
4 0

Answer:

32 005

Step-by-step explanation:

use this formula

Tn = a +(n-1)d

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Find the surface area of the square pyramid shown below. (Measurements in picture)
Sloan [31]

Given:

Side length of base = 8

Slant height = 6

To find:

The surface area of the square pyramid.

Solution:

Surface area:

$SA=A+\frac{1}{2} p s

where A is the area of base

p is the perimeter of base

s is the slant height

Area of base (A) = 8 × 8

                           = 64

Perimeter of base(P) = 4 × 8

                                  = 32

Substitute these in the formula:

$SA=64+\frac{1}{2} \times 32 \times 6

$SA=64+96

$SA=160

The surface area of the square pyramid is 160 unit².

8 0
2 years ago
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A town in east Texas received 25 inches of rain in two weeks. If it kept raining at this rate for a 31−day month, how much rain
Likurg_2 [28]
25 in of rain in 2 weeks.

there are 14 days in 2 weeks

25/14 = 1.785 in per day

1.785 x 31 = 55.335 in. of rain

55.335 in of rain is your answer

hope this helps
7 0
3 years ago
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Find the equation of the line passing through the points A (2,1) B (7,9)
Bezzdna [24]
m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}} = \frac{9 - 1}{7 - 2} = \frac{8}{5} = 1\frac{3}{5}
              y - y₁ = m(x - x₁)
               y - 1 = 1³/₅(x - 2) Point - Slope Form
               y - 1 = 1³/₅(x) - 1³/₅(2)
               y - 1 = 1³/₅x - 3¹/₅
                 + 1           + 1
                    y = 1³/₅x - 2¹/₅ Slope - Intercept Form
         -1³/₅x - y = 1³/₅x - 1³/₅x - 2¹/₅
          -1³/₅x - y = -2¹/₅
     -1(-1³/₅x - y) = -1(-2¹/₅)
-1(-1³/₅x) + 1(y) = 2¹/₅
           1³/₅x - y = 2¹/₅ Standard Form
         1³/₅(0) - y = 2¹/₅
                0 - y = 2¹/₅
                    -y = 2¹/₅
                    -1    -1
                     y = -2¹/₅ Y - Intercept
               (x, y) = (0, -2¹/₅)
7 0
3 years ago
What's the answer for <br> 0.2(x+50)-6=0.4(3x+20)
marin [14]
It should be x=11. could someone fact check me?

5 0
3 years ago
Nelda drove 315 kilometers and used 35 liters of gasoline. Her car averaged how many kilometers per liter of gas?​
Inessa [10]

Going 315 km uses up 35 liters of gasoline

On average, 1 liter of gasoline can travel the number of kilometers:

315 : 35 = 9 liters of gasoline

6 0
2 years ago
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