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Anarel [89]
3 years ago
13

Solve the inequality 3(y+5)>21

Mathematics
1 answer:
Kaylis [27]3 years ago
8 0

Answer:

y > 2

Step-by-step explanation:

1) 3(y+5)>21

Divide both sides by <em>3</em>.

2) y+5>7

Move the constant to the right side and change it's sign.

3) y>7-5

Subtract the numbers.

4) y>2

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In the Midpoint Rule for triple integrals we use a triple Riemann sum to approximate a triple integral over a box B, where f(x,
Tomtit [17]

To approximate the volume with 8 boxes, we have to split up the interval of integration for each variable into 2 subintervals, [0, 1] and [1, 2]. Each box will have midpoint m_{i,j,k} that is one of all the possible 3-tuples with coordinates either 1/2 or 3/2. That is, we're sampling f(x,y,z)=\cos(xyz) at the 8 points,

(1/2, 1/2, 1/2)

(1/2, 1/2, 3/2)

(1/2, 3/2, 1/2)

(3/2, 1/2, 1/2)

(1/2, 3/2, 3/2)

(3/2, 1/2, 3/2)

(3/2, 3/2, 1/2)

(3/2, 3/2, 3/2)

which are captured by the sequence

m_{i,j,k}=\left(\dfrac{2i-1}2,\dfrac{2j-1}2,\dfrac{2k-1}2\right)

with each of i,j,k being either 1 or 2.

Then the integral of f(x,y,z) over B is approximated by the Riemann sum,

\displaystyle\iiint_B\cos(xyz)\,\mathrm dV\approx\sum_{i=1}^2\sum_{j=1}^2\sum_{k=1}^2\cos m_{i,j,k}\left(\frac{2-0}2\right)^2

=\displaystyle\sum_{i=1}^2\sum_{j=1}^2\sum_{k=1}^2\cos\frac{(2i-1)(2j-1)(2k-1)}8

=\cos\dfrac18+3\cos\dfrac38+3\cos\dfrac98+\cos\dfrac{27}8\approx\boxed{4.104}

(compare to the actual value of about 4.159)

4 0
3 years ago
Lydia is painting flower vases. Each vase takes 3?16 of a quart of paint. She has 21?2 quarts of paint. How many flower vases ca
poizon [28]

Answer:

56

Step-by-step explanation:

Given that Lydia is painting flower vases.

Paint required for painting one flower case = 3/16 quart

total paint available with Lydia = 21/2 quart

We have to find the no of flower cases that can be painted.

This is a problem of direct variation since when no of flower cases increase paint required also increases.

3/16 quart for 1 flower case

Hence 21/2 quart for 21/2 divided by 3/16

= 21*16/(3*2)  (by rule for fraction division)

= 7(8)

= 56

5 0
3 years ago
The longer leg of a right triangle is 17 cm longer than the length of the shorter leg x. The hypotenuse is 25 cm.
kicyunya [14]
The answer is 15 cm long
5 0
3 years ago
Calc AB multiple choice. Please help
Vinvika [58]
You start off with 4*(cos(x+(pi/3)))

Let's place the 4 aside for the time being:

Cos(u+j) = cos(u)*cos(j) - sin(u)*sin(j)

cos(x+(pi/3)) = cos(x)*cos(pi/3) - sin(x)*sin(pi/3)

cos(x+(pi/3)) = cos(x)/2 - (sqrt(3)/2)*sin(x)

Multiplying by the 4 we put aside:

4*cos(x+(pi/3)) = 2*cos(x) - 2*sqrt(3)*sin(x)

The correct answer is B
3 0
3 years ago
Read 2 more answers
2b+ f + d + 3b + 2f + 2d + 8
Eduardwww [97]

Answer:

Did you want me to simplify the expression???

Step-by-step explanation:

3f+5b+3d+8

6 0
3 years ago
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