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attashe74 [19]
3 years ago
11

I need help plz with this

Mathematics
1 answer:
madam [21]3 years ago
5 0

Answer:

a) 390

b)108

I hope this answer was helpfull for you

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1). 15workers can dig a well in 16 days.how long will it take to dig the well by 20 workers?
goblinko [34]

Answer:

a)12days

b)8days

Step-by-step explanation:

15x16

=240

240÷20

=12days

24x15

=360

360÷45

=8 days

3 0
2 years ago
Write the equation of the line passing through the point (2,-1) with a slope of -3
Alexxandr [17]
Y= 2x-3 i think, but i may be wrong
4 0
3 years ago
Read 2 more answers
PLS answer both of them!!! What is 9/11 of 3 4/5? And what is 12/14 of 3 4/6??? PLS answer NEED to sleep in 15 minutes and still
Goryan [66]
#1
3.10909 (09 is repeated)
#2
3.124857....
3 0
3 years ago
Pls help I need these by midnight
SSSSS [86.1K]

Answer:

2 boxes

Step-by-step explanation:

im sorry this is a bit late but this is for other people

7 0
3 years ago
Please help !!! WILL MARK BRAINLIEST! +50 points!
faust18 [17]

Fun!

The center of the hyperbola is the midpoint of its foci.  The distance between the foci is 43-9=34.   So they're 17 from the center.

We have coordinates

F1(0,17)

F2(0,-17)

Let's call the vertex of the hyperbola V.   We have

V(0,13)

This is a vertical hyperbola so the equation is of the form

\dfrac{y^2}{a^2}- \dfrac{x^2}{b^2}=1

The vertices for a vertical hyperbola like this are (0, a) and (0,-a)

So we have a=13

The distance c from the foci to the center is given by

c^2 = a^2+b^2

b^2 = c^2-a^2 = 17^2 - 13^2 = 120

That says our hyperbola's equation is

\dfrac{y^2}{169}- \dfrac{x^2}{120}=1

That's our answer.

4 0
4 years ago
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