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3 years ago

Help with this problem

Mathematics

1 answer:

AURORKA [14]3 years ago

8 0

Answer:

It would be

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A and B take M days to complete a task together if A takes 27 days more than A and B to complete the task alone. And if B takes

Juliette [100K]

Answer:

9 days.

hope it helps

Step-by-step explanation:

As per given data

1/x=1/(x+27)+1/(x+3)

1/x=(x+3+x+27)/(x+27)(x+3)

X^2+30x+81=2x^2+30x

X^2=81

X=9

so A&B can together do the work in 9 days

7 0

3 years ago

6. Solve P = C + rC for r.

slavikrds [6]

Answer:

r=c2pi ok

Step-by-step explanation:

that the answer

4 0

3 years ago

Read 2 more answers

Hi plz help me with this geometry question

stepan [7]

Answer:

Approximately 54°

Step-by-step explanation:

So we know Angle A, the side opposite to Angle A, and the side opposite to Angle B (the angle we want to find). Given these circumstances, we can use the Law of Sines.

The Law of Sines states that:

$\frac{\sin(A)}{a} =\frac{\sin(B)}{b} =\frac{\sin(C)}{c}$

The variables do not really matter. Instead, it's more important that the angle corresponding to the side lines up with each other.

Anyways, since we know Side A, Angle A, and Side B, let's use the first and second ratios:

$\frac{\sin(A)}{a} =\frac{\sin(B)}{b}$

Plug in 80° for A, 11 for a, and 9 for b:

$\frac{\sin(80)}{11} =\frac{\sin(B)}{9}$

Cross multiply to solve for B:

$9\sin(80)=11\sin(B)$

Divide both sides by 11:

$\sin(B)=\frac{9\sin(80)}{11}$

Use the inverse sine function. And finally, use a calculator to solve:

$\angle B =\sin^{-1}(\frac{9\sin(80)}{11} )\\\angle B\approx53.6829\textdegree\approx54\textdegree$

4 0

3 years ago

Mary reduced the size of a painting to a width of 3.3 in. What is the new height if it was originally 32.5 in tall and 42.9 in w

posledela

The ratio of the height and width remain constant as you change it's size.
So..
A = Old width
B = Old height
C = New width
D = New height

A/B = C/D

Plug in the values we have

42.9 / 32.5 = 3.3 / D

Multiple both sides by D
D * 42.9 / 32.5 = 3.3

Multiple both sides by 32.5

D * 42.9 = 3.3 * 32.5

Now divide both sides by 42.9

D = 3.3 * 32.5 / 42.9

Now simply do the multiplication and division using the available numbers.
D = 2.5

6 0

3 years ago

Find the median, lower quartile, and upper quartile for the set of data.

Irina-Kira [14]

Answer:

The median is 2 lower quartile is 11 and upper quartile is 6

Step-by-step explanation:

hope this helps

5 0

3 years ago