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3 years ago

15x+100=82 (has pic)

Mathematics

2 answers:

aksik [14]3 years ago

5 0

15x+100=28
x=-6/5
The answer is -6/5

klemol [59]3 years ago

5 0

Subtract 100 from both sides making it 15x= -18 then divide both sides by 15 making it x= -1.2

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PLEASE HELP!

Wittaler [7]

Answer:

See below

Step-by-step explanation:

Use the formulae directly

For a cone, with base radius = r and height = h, here are the related formula

$\textrm{Slant height l} = \sqrt{r^2 + h^2}$ (1)

$\textrm{Lateral surface area} = \pi r l$

$\textrm {Base area} = \pi r^2$

$\textrm { Total Surface Area SA} = \textrm{Base Area + Lateral Area} = \pi r^2 + \pi rl = \pi r(r + l)$ (2)

$\textrm{Volume V = } (1/3) \pi r^2h$ (3)

Therefore directly plugging in the numbers in the above equations:

Note:

l = slant height in cm
SA = total surface area in sqcm
V = Volume in cubic cm

Figure(a)

r = 4, h = 8

$\textrm{l} = \sqrt{4^2 + 8^2} =\sqrt{80} = 8.944 \\\textrm{SA} = 4\pi(4 + 8.944) = 4\pi(12.944) = 162.66\\\textrm{V} = (1/3)\pi(4^2)(8) = 134.04$

Figure(b)

r = 7, h =15

$\textrm{l} = \sqrt{7^2 + 15^2} =\sqrt{274} = 16.55$

$\textrm{SA} = 7\pi(7 + 16.55) = 517.89$

Figure (c)

r = 5, l = 8

$h = \sqrt{l^2 - r^2} = \sqrt{8^2 - 5^2} = \sqrt{39} = 6.245\\SA = \textrm{SA} = 5\pi(5 + 8) = 204.2\\V = (1/3)\pi(5^2)(6.245) = 163.5$

6 0

1 year ago

Can someone help me with this geometry question please 100% correct only

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3 years ago

Read 2 more answers

Solve using substitution method. 3×-4y=18 and 2x + y = 1

Shalnov [3]

3x - 4y = 18 ⇒ 3x - 4y = 18
2x + y =   1 ⇒ 8x + 4y =   4
      11x = 22
   11    11
      x = 2
      2x + y = 1
   2(2) + y = 1
   4 + y = 1
   - 4 - 4
   y = -3
      (x, y) = (2, 3)

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