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3 years ago

Please help with questions 6 & 7

Mathematics

2 answers:

mash [69]3 years ago

4 0

5x10^5

0.000023 + 0.0000078= 0.0000308
3.8x10^-6

i think
sorry if wrong but i dont know the second one that well

Sunny_sXe [5.5K]3 years ago

3 0

#7a = 2 and 20 tenths

#7b = ????????????????????????????????????????????????????????????????

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Max and pedro both clean pools. Each charges a flat fee to clean a pool. Max cleans 12 pools in 8 hours and earned $270. Pedro c

marshall27 [118]

Answer:

The number of pools clean per hour is 1.5

Step-by-step explanation:

Given as :

The number of pools clean in 8 hours = 12

The number of pools clean in 7.5 hours = 9

Let The number of pools they clean per hours = x

I.e x = $\frac{8}{12}$ + $\frac{7.5}{9}$

Or, x = $\frac{24+30}{36}$

Or, x = $\frac{54}{36}$

∴ x = $\frac{3}{2}$

I.e x = 1.5

Hence The number of pools clean per hour is 1.5 Answer

3 0

2 years ago

20 points five stars a thank you, dont need to awnser first. i will repeat this question every 3 and a half minutes. ive got nin

melomori [17]

Answer:

Thanks, you are so generous

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

PLEASE HELP

Rudik [331]

$y=75\ \ \ \ x=5\\\\
y=?\ \ \ \ \ x=3\\\\
proportion:\\
\frac{75}{y}=\frac{5}{3}\ \ \ | cross\ multiplication\\\\
75*3=5y\\\\
225=5y\ \ \ | divide\ by\ 5\\\\
y=45
$

5 0

3 years ago

Work out the equation of<br> the line that goes through<br> (3, 2) and (-1, 10)

Natali5045456 [20]

Answer:

$The\,\,equation\,\,will\,\,be\,\,2x+y=8$

Step-by-step explanation:

Let, A=(3,2)

B=(-1,10)

So, The equation will be

$\frac{x-x_{1} }{x_{1} -x_{2} } =\frac{y-y_{1} }{y_{1} -y_{2} } \\=>\frac{x-3 }{3-(-1) } =\frac{y-2 }{2-10} \\=>\frac{x-3 }{4} =\frac{y-2 }{-8}\\=>-8x+24=4y-8\\=>8x+4y=32\\=>2x+y=8$