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3 years ago

Was this equation solved correctly? How do you know?

Mathematics

1 answer:

fiasKO [112]3 years ago

7 0

Yes you used the correct steps in the right order

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80 is 40% of what number?

Artist 52 [7]

$x-number\\\\40\%x=80\\\\40\%=\frac{40}{100}=0,4\\\\0,4x=80\ \ |:0,4\\\\x=\frac{80}{0,4}=200\\\\ 80\ is\ 40\% \ of\ 200.$

6 0

3 years ago

G(x) = 4х+1

DanielleElmas [232]

I believe it’s 13

you would substitute the x for 3
so you would multiply 4 by 3 and get 12
you then would add 1

7 0

3 years ago

there are 90 people in a group. 6 of the people are men. The number of women is 2 times the number of men. the rest are children

stepladder [879]

Answer:

n= 12

Step-by-step explanation:

6*2= 12

Men= 6

Women= 12

12+6= 18

90-18= 72

72:6= 12:1

3 0

3 years ago

Convert 1 cal/(m^2 * sec * °C) into BTU/(ft^2 * hr * °F)

Crazy boy [7]

Answer:

$1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=0.03926\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}$

Step-by-step explanation:

To find : Convert $1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}$ into $\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}$

Solution :

We convert units one by one,

$1\text{ m}^2=10.7639\text{ ft}^2$

$1\text{ sec}=\frac{1}{3600}\text{ hour}$

$1\text{ cal}=0.003968\text{ BTU}$

Converting temperature unit,

$^\circ C\times \frac{9}{5}+32=^\circ F$

$1^\circ C\times \frac{9}{5}+32=33.8^\circ F$

So, $1^\circ C=33.8^\circ F$

Substitute all the values in the unit conversion,

$1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=\frac{0.003968}{10.7639\times \frac{1}{3600}\times 33.8}\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}$

$1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=\frac{0.003968}{0.101061}\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}$

$1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=0.03926\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}$

Therefore, The conversion of unit is $1\ \frac{\text{cal}}{m^2\times sec\times ^\circ C}=0.03926\frac{\text{BTU}}{ft^2\times hr\times ^\circ F}$

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3 years ago

What is the area of the parallelogram?

Marizza181 [45]

Answer:

0.6

Step-by-step explanation:

3 0

3 years ago