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Aneli [31]
3 years ago
7

Humans breathe about 15 breaths in a minute. The average

Mathematics
1 answer:
NeX [460]3 years ago
7 0

Answer:

Humans breathe about 300 liters of air in 25 minutes

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Johnny has four pencils Mikey has four times as many pencils girl has two pencils how many pencils do they have total
k0ka [10]
The answer would of been either 10 or 32
4 0
3 years ago
Read 2 more answers
[x÷(y–1)](−4)–[xy+(−3)]÷(−1) if x=−5, y=−2
IrinaK [193]
The result is 1/3.

_____
The first attempt in the attached picture has parentheses in the wrong place for the second term. This simplifies to
.. (-5/-3)*(-4) +(10 -3)
.. = -20/3 +7
.. = -(6 2/3) +7
.. = 1/3

5 0
3 years ago
What is the Volume of the square pyramid? (Round to the nearest tenth as needed)
goldenfox [79]

Answer:

5229 mm³

Step-by-step explanation:

Volume of square pyramid

\sf \boxed{Volume \ of \ the \ square \ pyramid = \dfrac{1}{3}*b^2*H}

      b = base length = 25 mm

       H = height

         We have to find 'H' using Pythagorean theorem,

              slant height (hypotenuse) = 28 mm

                                                  leg₁ = base length  ÷ 2 = 25÷2 = 12.5

                                                  leg₂ = H

     H² + (12.5)² = 28²

                  H²   = 784 - 156.25

                         = 627.75

                   \sf H = \sqrt{627.75}

                 H = 25.01 mm

          \sf  \text{Volume of square pyramid =$\dfrac{1}{3}*25*25*25.1$ }

                                                     = 5229 mm³

                                                     

       

\sf \boxed{\text{Volume of square pyramid = \dfrac{1}{3}*25*25*28}}

3 0
2 years ago
Read 2 more answers
The table shows a proportional relationship between the number of pounds of bananas purchased and the total cost of bananas.
Liula [17]

Answer:

Choice A, C and E

Step-by-step explanation:

<em>Your table is poorly presented</em>

Given

x      y

\begin{array}{cc} {3} & {1.47} \ \\ {5} & {2.45} \ \\ {9} & {4.41} \ \ \end{array}

First, we calculate the constant of proportionality (k)

k = \frac{y}{x}

For (3,1.47)

k = \frac{1.47}{3}

k = 0.49

For (5,2.45)

k = \frac{2.45}{5}

k = 0.49

For (9,4.41)

k = \frac{4.41}{9}

k = 0.49

From the above calculations, the constant of proportionality is 0.49.

So, the usable rows must also have 0.49 as their constant of proportionality

<u>Choice A</u>

(x,y) = (2,0.98)

k = \frac{0.98}{2}

k = 0.49 --- <em>This is usable</em>

<em />

<u>Choice B</u>

(x,y) = (7,4.45)

k = \frac{4.45}{7}

k = 0.64 --- <em>This is not usable</em>

<em />

<u>Choice C</u>

(x,y) = (6,2.94)

k = \frac{2.94}{6}

k = 0.49 --- <em>This is usable</em>

<em />

<u>Choice D</u>

(x,y) = (1,0.54)

k = \frac{0.54}{1}

k = 0.54 ---- <em>This is not usable</em>

<em />

<u>Choice E</u>

(x,y) = (8,3.92)

k = \frac{3.92}{8}

k = 0.49 --- <em>This is usable</em>

5 0
3 years ago
Write a linear equation that passes through pairs would be perpendicular to the equation the point (2, -9) and has a slope of -5
Lostsunrise [7]

A A equation that’s perpindicular to y = 4x - 1 and passes through the point (2, -9) is…

Answer: y = -3/4x - 15/2

Explanation: Opposite reciprocal slopes and plug in -9 with y and 2 with x then solve for b

-9 = -1.5 + x

x = -15/2

6 0
3 years ago
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