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Kazeer [188]
3 years ago
8

How do you solve -k/5 times 7/5

Mathematics
1 answer:
Firdavs [7]3 years ago
5 0

Answer:

\frac{-7}{25}k

Step-by-step explanation:

\frac{-k}{5} *\frac{7}{5}

just multiply across

-k*7=-7k

5*5=25

\frac{-7}{25}k

hope this helps

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3x+3(x+y)3, x, plus, 3, left parenthesis, x, plus, y, right parenthesis
aliina [53]

Answer: =12x+9y

Step-by-step explanation: Hope this help :D

7 0
2 years ago
What is the equation for twice a number less 13 is 53
rewona [7]

Answer:

The number is 33.

Step-by-step explanation:

2x-13=53

2x=53+13

2x=66

x=66/2=33

8 0
3 years ago
A swimming pool can be filled by any of three hoses A, B or C. Hoses A and B together take 4 hours to fill the pool. Hoses A and
yanalaym [24]

Answer:

3 hours  28 minutes

Step-by-step explanation:

Let A = the RATE at which hose A can fill the pool alone

Let B = the RATE at which hose B can fill the pool alone

Let C = the RATE at which hose C can fill the pool alone

Hoses A and B working simultaneously can pump the pool full of water in 4 hours

From Question. The combined RATE of hoses A and B is 1/4 of the pool PER HOUR

In other words, A + B = ¼

Hoses B and C working simultaneously can pump the pool full of water in 6 hours

From Question. The combined RATE of hoses A and C is 1/4 of the pool PER HOUR

In other words, B + C = 1/6

Hoses A and C working simultaneously can pump the pool full of water in 5 hours

From Question. The combined RATE of hoses A and C is 1/5 of the pool PER HOUR

In other words, A + C = 1/5

At this point, we have the following system:

A + B = 1/4  ...1

B + C = 1/6  ...2

A + C = 1/5  ...3

Considering equation one

A  = 1/4 -B

A = (1 - 4B)/4 ....4

sub equation 4 into 2

(1 - 4B)/4 + C = 1/5

C = B - (1/20)

Considering equation  3

B + [B-(1/20)] = 1/6

B =7/80

Sub B Into enq 1 and 2

A =13/80

C = 3/80

A+B+C = 23/80

          3.47

=> 3 hours

0.47 × 60 = 28minutes

7 0
3 years ago
Read 2 more answers
You do not have to exsplain
tangare [24]

Answer:

V=87.92

Step-by-step explanation:

v=bh,V=3.14*2*2*7

4 0
3 years ago
Which two points are on the graph of y = x - 3?
Readme [11.4K]
The answer is the third one: (0,-3),(4,1)

plug in the X and Y in the given equation
(0,-3): -3 = 0 - 3. this is correct
(4,1): 1 = 4-3. this is also correct 
3 0
3 years ago
Read 2 more answers
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