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2 years ago

Help 9th grade math i’ll give brainliest

Mathematics

1 answer:

lozanna [386]2 years ago

7 0

Answer:

its 6 hope it helps if not 4 do not know

Step-by-step explanation:

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Evaluate the function f(x)=3x-7if x=6

notka56 [123]

Answer:

if x=6, then f(6)=11

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3 years ago

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Expand. If necessary, combine like terms. (x+3)(x – 3) = ?

Kobotan [32]

Step-by-step explanation:

multiply it

x²-3x+3x-9=0

x²-9=0

x²=9

square root both side we get

x=3

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3 years ago

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Christopher estimates it will take him half an hour to complete his math homework. He is able to complete it in 25 minutes. What

marin [14]

Answer:

The percent error in his estimate is 16.67%.

Step-by-step explanation:

Given:

Christopher estimates it will take him half an hour to complete his math homework.

He is able to complete it in 25 minutes.

Now, to find the percent error in his estimate.

Time estimates of completing homework = 30 minutes.

Time actual taken to complete homework = 25 minutes.

Error in estimate = Time estimates of completing homework - Time actual taken to complete homework.

Error in estimate = 30 minutes - 25 minutes.

Error in estimate = 5 minutes.

Now, to get the percent error:

$Percent\ error =\frac{Error\ in\ estimate}{Time\ estimates\ of\ completing\ homework} \times 100.$

$Percent\ error=\frac{5}{30} \times 100$

$Percent\ error=\frac{500}{30}$

$Percent\ error=16.67\%.$

Therefore, the percent error in his estimate is 16.67%.

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3 years ago

Match the width with the given area and length of a rectangle.

torisob [31]

Answer:

5 cm A = 44cm; w = 8.8 cm

7.5 cm A = 48.75 cm2; w = 6.5 cm

5 cm A = 31.25; w = 6.25

9.25 cm A = 55.5 cm; w = 6 cm

Step-by-step explanation:

What you have to do to find the answer is to take the length which for the first problem is 5 cm and then multiply the 5 by each width until you get the area. Example; Length x Width = Area

Basically you use the length times all of the widths until you match up the area.

Hope I could help

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3 years ago

What fraction is equivalent to 5/10 and has a denominator of 100

valentina_108 [34]

Multiply numerator and denominator by the same number - 50/100.

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3 years ago

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