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3 years ago

At Marie's school, 65% of the students are learning a second language.

Mathematics

1 answer:

SpyIntel [72]3 years ago

5 0

Answer:

There are 220 students at Marie's school :)

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Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the curves about the given

rewona [7]

Answer:

5.81

Step-by-step explanation:

The method of cylindrical shells uses this formula:

$\int\limits^a_b {2 \pi * shellRadius * shellHeight} \, dx$

It integrates the pieces of area in the region.

In this case:

$2 \pi * \int\limits^2_0 {x * cos(\frac{\pi}{4} * x)} \, dx$

Integrating by computer:

$2*\pi*(\frac{4}{\pi^2}*(\pi*x*sin(\frac{\pi}{4}*x) + 4*cos(\frac{\pi}{4}*x)))$

Evaluating between 0 and 2

$2\pi * (\frac{4}{\pi^2}*(\pi*2*sin(\frac{\pi}{4}*2) + 4*cos(\frac{\pi}{4}*2)) - \frac{4}{\pi^2}*(\pi*0*sin(\frac{\pi}{4}*0) + 4*cos(\frac{\pi}{4}*0))) = 5.81$

8 0

3 years ago

Solve (Y+5)^3/2=4 where y is a real number

koban [17]

Answer:

$y {}^{2} + 10y = - 33.5$

Step-by-step explanation:

(y+5)(y+5)x3/2=4

Y(y+5)+5(y+5) x 3/2=4

$y {}^{2} + 5y + 5y + 25 \times 3 \2 = 4$

$y ^{2} + 10y + 75 \2 = 4$

$y {}^{2} + 10y + 37.5 = 4$

$y {}^{2} + 10y = 4 - 37.5$

$y {}^{2} + 10y = - 33.5$

5 0

3 years ago

The expression 3 × 7 – 4 × 8 + 2 is equivalent

vlabodo [156]

I believe the answer you are looking for is -9<span />

3 0

3 years ago

Read 2 more answers

Write the equation of the line passing through the points (-4 -7) and (8 -13)

Elina [12.6K]

Answer: jebron lames

Step-by-step explanation:

5 0

3 years ago

How do I solve for x and y?

saveliy_v [14]

Answer:

x = 69
y = 21

Step-by-step explanation:

To solve for x and y, take advantage of the relationships between angles and diagonals in a rhombus. Each diagonal bisects the vertex angle, and the acute angles in each right triangle are complementary.

The angles created by the diagonal at the lower left vertex are congruent:

y° = 21°

The angles x° and y° are complementary:

x° = 90° -21°

x° = 69°

5 0

2 years ago