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4 years ago

How many days in the month of february??

1 answer:

7 0

Well it depends if it's a leap year. If it isn't a leap year there are 28 days and if we are in a leap year than there are 29 days in February. Hope that helped :)

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Three pieces of artwork were chosen from each grade of Eastlake Elementary School to be displayed at the school art show. If the

kkurt [141]

9×3

=27 pieces of artwork to be displayed.

7 0

3 years ago

Read 2 more answers

Answer all of these plese????

Rom4ik [11]

Number 5 is a unit fraction. Example do Unit fraction 5/6=One six six times or 1/5 five times hope this helps

8 0

3 years ago

The height of a rectangle is increasing at a rate of 3 centimeters per hour and the width of the rectangle is decreasing at a ra

n200080 [17]

Answer:

Rate of change of the area of the rectangle at that instant = 7 cm²/hr.

Step-by-step explanation:

Area of rectangle = Height x Width

A = hw

The height of a rectangle is increasing at a rate of 3 centimeters per hour and the width of the rectangle is decreasing at a rate of 4 centimeters per hour.

$\texttt{Rate of change of height = }\frac{dh}{dt}=3cm/hr\\\\\texttt{Rate of change of width = }\frac{dw}{dt}=-4cm/hr$

Differentiating area with respect to time,

$\frac{dA}{dt}=h\frac{dw}{dt}+w\frac{dh}{dt}$

We need to find rate of change of area when the height is 5 centimeters and the width is 9 centimeters.

$\frac{dA}{dt}=h\frac{dw}{dt}+w\frac{dh}{dt}\\\\\frac{dA}{dt}=5\times (-4)+9\times 3=-20+27=7cm^2/hr$

Rate of change of the area of the rectangle at that instant = 7 cm²/hr.

5 0

4 years ago

12. Karen earns $20 for every three cake she sells. Which graph models a relationship with the same unit rate?

Kruka [31]

Answer:

Graph B

Step-by-step explanation:

There is a clear relationship between the amount of money she earns and the cakes she sells

5 0

3 years ago

Find the volume of the parallelepiped with adjacent edges PQ, PR, and PS. P(1, 0, −1), Q(3, 3, 0), R(3, −3, 0), S(1, −2, 2)

topjm [15]

Answer:

the volume of the parallelepiped is = 36

Step-by-step explanation:

given,

P(1, 0, −1), Q(3, 3, 0), R(3, −3, 0), S(1, −2, 2)

PQ = Q - P = (2, 3, 1)

PR = R - P = (2, -3 , 1)

PS = S - P = (0, -2 , 3)

now volume of parallelopiped

[PQ PR PS] = $\begin{bmatrix}2 & 3 &1 \\ 2 & -3 &1 \\ 0 & -2 &3 \end{bmatrix}$

now calculating determinant of the matrix

= 2 (-9+2) - 3 (6-0) + 1 (-4-0)

= -14 - 18 - 4

= -36

hence , the volume of the parallelepiped is = 36

4 0

3 years ago