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notka56 [123]
3 years ago
15

a piece of coal in a shape of a square pyramid has base edge pf 8.2 in on each side and with height of 5.3 in. What is the volum

e?
Mathematics
2 answers:
lozanna [386]3 years ago
4 0
Volume = 1/3a^2h

v= 1/3 x 8.2^2 x 5.3

v=118.79066666667 in^3
vredina [299]3 years ago
3 0
The volume is 43.46.
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Kim rode her bike 135 miles in 9 weeks riding the same distance each week. Eric rode his bike 102 miles in 6 weeks the same dist
pentagon [3]
Kim = 135/9 = 15 miles per week
Eric = 102/6 = 17 miles per week

Eric rode more.

5 0
3 years ago
Identify the zeros of f(x) = (x + 9)(x − 4)(6x + 1).
slavikrds [6]
<h2>The required 'option a)  - 9 , \dfrac{-1}{6}, 4' is correct.</h2>

Step-by-step explanation:

We have,

f(x) = (x + 9)(x − 4)(6x + 1)

To find, all zeroes of the given equation = ?

∴ f(x) = (x + 9)(x − 4)(6x + 1)

⇒ (x + 9)(x − 4)(6x + 1) = 0

⇒ x + 9 = 0 or, x − 4 = 0 or, 6x + 1 = 0

⇒ x + 9 = 0 ⇒  x = - 9

⇒ x − 4 = 0 ⇒ x = 4

⇒ 6x + 1 = 0

⇒ 6x = - 1

⇒ x = \dfrac{-1}{6}

∴ x = - 9 , \dfrac{-1}{6}, 4

Thus, the required 'option a)  - 9 , \dfrac{-1}{6}, 4' is correct.

3 0
3 years ago
Read 2 more answers
You are competing in a race. The table shows the times from last year's race you want your time to be last year's median time wi
aleksandr82 [10.1K]

Answer:

27\leq x \leq37

Step-by-step explanation:

Let's arrange the numbers from least to greatest:

20, 25, 27, 28, 31, 32, 32, 38, 40, 40, 42, 48

The median is the "middle" number when arranged from least to greatest.

There are 12 numbers, so the middle number would be "average" of 6th and 7th terms.

6th term = 32

7th term = 32

Average = (32+32)/2 = 32

Hence, median = 32

Absolute deviation of 5 minutes means 5 minutes less or greater than the median, 32.

So, 32 - 5 = 27  &  32 + 5 = 37

Hence  27\leq x \leq37

4 0
3 years ago
BRAINLIEST ANSWER UP FOR GRABS!!
Svetach [21]
X = sqrt(5^2 - 3^2) = 4
y = sqrt(7^2 - 3^2) = sqrt 40

Horizontal distance = x + y + 3 = 7 + sqrt40
8 0
3 years ago
Read 2 more answers
When solving for x, what is x squared plus 15 equals -8x
VLD [36.1K]

Answer:

x = - 5, x = - 3

Step-by-step explanation:

Given

x² + 15 = - 8x ( add 8x to both sides )

x² + 8x + 15 = 0 ← in standard form

Consider the factors of the constant term (+ 15) which sum to give the coefficient of the x- term (+ 8)

The factors are 5 and 3, since

5 × 3 = 15 and 5 + 3= 8, thus

(x + 5)(x + 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5

x + 3 = 0 ⇒ x = - 3

5 0
3 years ago
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