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1 year ago

A designer is hanging a mirror that is 101 centimeters (cm) wide in a room.

Mathematics

1 answer:

Natalka [10]1 year ago

7 0

Answer:

240.5 cm and 139.5 cm, respectively

Step-by-step explanation:

101 cm / 2 = 50.5 cm

The right edge of the mirror is 50.5 cm to the right of the center line.

The right end of the wall is 190 cm from the center line.

190 cm - 50.5 cm = 139.5 cm

139.5 cm + 101 cm = 240.5 cm

240.5 cm and 139.5 cm, respectively

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8.46 If 100 is decreased by a% and the result is decreased by b%, then what is the total percent decrease (in terms of a and b)?

Marysya12 [62]

Answer:

The total percent decrease is $a+b-\frac{a b}{100}$

Step-by-step explanation:

We are given with a word problem
We are asked to find the total percentage decrease
We can do this in two steps

Step 1: Finding the two percentage decrease

Step 2: Finding their difference

Step 1 of 2

Let the decrease by a% be 100-a

Then b% decrease is

$\begin{aligned}\frac{b}{100} \times(100-a) &=\frac{100 b-a b}{100} \\\frac{100 b}{100}-\frac{a b}{100} &=b-\frac{a b}{100}\end{aligned}$

Step 2 of 2

The percentage difference between the two percentages is,

$\begin{aligned}&(100-a)-\left(b-\frac{a b}{100}\right)=100-a-b+\frac{a b}{100} \\&100-a-b+\frac{a b}{100}=100-\left(a+b-\frac{a b}{100}\right)\end{aligned}$

Since 100 is the total percent $a+b-\frac{a b}{100}$ is the percentage decrease.

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1 year ago

sp2606 [1]

Answer:

Step-by-step explanation:

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48-9+12=51

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2 years ago

SOLVE PLEASE REALLY NEED HELP<br> 4√n^2 + √m^2n - √4n^2 - √mn^2

Oksi-84 [34.3K]

Answer:

m√n + 2n -n√m

Step-by-step explanation:

Solution:

4√n^2 +√m^2n - √4n^2 - √mn^2

= 4n + m√n - 2n - n√m

= m√n + 4n - 2n - n√m

Therefore, m√n + 2n -n√m

PLZ MARK ME AS BRAINLIEST!!!

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