<img src="https://tex.z-dn.net/?f=18%20%7Bx%7D%5E%7B2%7D%20-%20x%20-%2039%20" id="TexFormula1" title="18 {x}^{2} - x

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bekas [8.4K]

3 years ago

"18 {x}^{2} - x - 39 " align="absmiddle" class="latex-formula">
How to solve this

Mathematics

2 answers:

Anton [14]3 years ago

7 0

I don’t know if you can solve it since it is an expression?

Maru [420]3 years ago

7 0

The answer is X=1.5

x squared = 2.25 (1.5 x 1.5)

18 x 2.25 = 40.5

40.5 - 1.5 = 39

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2 years ago

1)How many ways can the letters in the word BOOKKEEPER be arranged? (Must show set-up )

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There are 5 letters (B, O, K, E, R) and there is a total of 10 letters to make up the word.
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Question 2

There are seven swimmers in total.
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Question 3

The probability of eating an orange and a red candy is $\frac{15}{31}$ × $\frac{9}{30}$ , which equals to $\frac{9}{62}$

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3 years ago

Can someone please answer 5, 6 and 7? Thank you.

Montano1993 [528]

Reduce a 24 cm by 36 cm photo to 3/4 original size.

The most logical way to do this is to keep the width-to-height ratio the same: It is 24/36, or 2/3. The original photo has an area of (24 cm)(36 cm) = 864 cm^2.

Let's reduce that to 3/4 size: Mult. 864 cm^2 by (3/4). Result: 648 cm^2.

We need to find new L and new W such that W/L = 2/3 and WL = 648 cm^2.

From the first equation we get W = 2L/3. Thus, WL = 648 cm^2 = (2L/3)(L).

Solve this last equation for L^2, and then for L:

2L^2/3 = 648, or (2/3)L^2 = 648. Thus, L^2 = (3/2)(648 cm^2) = 972 cm^2.

Taking the sqrt of both sides, L = + 31.18 cm. Then W must be 2/3 of that, or W = 20.78 cm.

Check: is LW = (3/4) of the original 864 cm^2? YES.

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3 years ago