3 years ago

What is the result when 75 is decreased by 40%

1 answer:

RSB [31]3 years ago

7 0

30 is 40% of 75 so it should be 45

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aev [14]

120
A= bh 1/2
15 x 16 = 240
240/2
120

4 0

3 years ago

alexira [117]

8/4=12/x
Would be the ratio.

Solve it:

8/4 =12/x

2=12/x

2x=12

X=6

5 0

3 years ago

Nimfa-mama [501]

First of all, we can observe that

$x^2-6x+9 = (x-3)^2$

So the expression becomes

$\dfrac{x^2-4}{\sqrt{(x-3)^2}} = \dfrac{x^2-4}{|x-3|}$

This means that the expression is defined for every $x\neq 3$

Now, since the denominator is always positive (when it exists), the fraction can only be positive if the denominator is also positive: we must ask

$x^2-4 \geq 0 \iff x\leq -2 \lor x\geq 2$

Since we can't accept 3 as an answer, the actual solution set is

$(-\infty,-2] \cup [2,3) \cup (3,\infty)$

7 0

2 years ago

Lelu [443]

7(3x/1)=-1
7(3x)=-1
21x=-1
21x/21=-1/21
X=-1/21

Answer: -1/21

7 0

3 years ago

Klio2033 [76]

C because twice the difference of a number and 5
2 (n-5)
or it can be wrtten as 2(x-5)

8 0

2 years ago