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3 years ago

PLEASE HELP ME!!! PLEASE

Mathematics

2 answers:

SpyIntel [72]3 years ago

8 0

(8,-7) I think! Hope this helps!

Hoochie [10]3 years ago

7 0

Answer:

it should be (8,-7)

Step-by-step explanation:

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Leno4ka [110]

Answer:

Step-by-step explanation:

It’s 12

8 0

3 years ago

4 men and 6 boys can finish a piece work in 5 days while 3 men and 4 boys can finish it in 7 days. find the time taken by 1 man

Anon25 [30]

Answer:

Number of days taken by 1 man alone and 1 boy alone are 35 days and 70 days respectively.

Step-by-step explanation:

Let, the work completed by 1 man in 1 day = x and the work completed by 1 boy in 1 day = y.

So, 4 men and 6 boy's 1 day work is $\frac{4}{x}$ and $\frac{6}{y}$

And, 3 men and 4 boy's 1 day work is $\frac{3}{x}$ and $\frac{4}{y}$

Since, 4 men and 6 boys complete the work in 5 days and 3 men and 4 boys complete the work in 7 days.

So, we have,

$\frac{4}{x}+\frac{6}{y}=\frac{1}{5}$

$\frac{3}{x}+\frac{4}{y}=\frac{1}{7}$

Let, $u=\frac{1}{x}$ and $v=\frac{1}{y}$

So, the equations are,

$4u+6v=\frac{1}{5}$ ................(1)

$3u+4v=\frac{1}{7}$ ................(2)

Multiply (1) by 3 and (2) by 4 and subtract the equations, we get,

$2v=\frac{1}{35}$ i.e. $v=\frac{1}{70}$ i.e. $\frac{1}{y}=\frac{1}{70}$ i.e. y = 70.

Substitute value of 'v' in (1) gives,

$4u+\frac{6}{70}=\frac{1}{5}$ i.e. $4u=\frac{-6}{70}+\frac{1}{5}$ i.e. $4u=\frac{8}{70}$ i.e. $u=\frac{8}{70\times 4}$ i.e. $u=\frac{1}{35}$ i.e. $\frac{1}{x}=\frac{1}{35}$ i.e. x = 35

So, the number of days taken by 1 men alone and 1 boy alone are 35 days and 70 days respectively.

4 0

4 years ago

What is 5674324 / -6

Liono4ka [1.6K]

Answer:

-2837162/3

Step-by-step explanation:

5674324/-6

-5674324/6

-2837162/3

8 0

3 years ago

HELP ME PLEASE ASAP!?Which of the following is most likely the next step in the series?

nadya68 [22]

Answer:

B. because the first one has 3 sides second has 4 third has 5 and B. has 6

5 0

3 years ago

A town's recreation department is updating its parks. The parks must have slides and swings.

Fittoniya [83]

Number of swings = x
Number of slides = y

First condition:
number of slides must be more than 3 times number of swings
This means that: y > 3x

Second condition:
each swing cost 275$ and each slide costs 168$. They cannot spend more than 1250$. This means that the sum of costs of swings and slides should not exceed 1250$ (should be less than or equal to 1250$)
This means that: <span>275x+168y ≤ 1250

Based on this:
The correct choices are: b and d</span>

5 0

3 years ago

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