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Yanka [14]
3 years ago
7

Given: -1/2x>6. Choose the solution set

Mathematics
2 answers:
dusya [7]3 years ago
6 0

Answer:x|x€R,x<-12

Step-by-step explanation:

Just took the test. 2nd choice is correct

Step2247 [10]3 years ago
5 0

Answer:

B

Step-by-step explanation:

multiply both sides by 2 to eliminate the fraction

- x > 12

multiply both sides by - 1

Remembering to reverse the inequality symbol as a consequence

x < - 12 ← reverse symbol

⇒ { x | x ∈ R, x < - 12 } → B


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Cooling towers are used to remove or expel heat from a process. A cooling tower's walls are modeled by x squared over 324 minus
olchik [2.2K]

The width of the cooling tower at the base of the structure will be A. 36 meters.

<h3>How to calculate the width?</h3>

From the information given, the towers walls are modeled by x²/324 - (y² - 90)²/1600.

Therefore, the width of the cooling tower at the base of the structure will be:

= 2 × ✓324

= 2 × 18

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In conclusion, the width is 36 meters.

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1 year ago
Which expression is equivalent to -6 (3x - 2/3)
jonny [76]

Answer:

D (We can extend all the expressions)

8 0
2 years ago
A pond has 150 fish and the population decreases by 8% each day. How many days before there are 30 fish
nlexa [21]

Answer:

19 days

Step-by-step explanation:

Given

a = 150 --- initial

r = 8\% -- rate

Required

Days when the fish gets to 30

The function is exponential and as such it follows;

y = ab^x

Where x represents the number of days and y the number of fishes

Because the fishes decreases;

b = 1 - r

So, we have:

b = 1 - 8\%

Express as decimal

b = 1 - 0.08

b = 0.92

In y = ab^x

a =150

y = 30

b = 0.92

So, we have:

30 = 150 * 0.92^x

Divide both sides by 150

0.2 = 0.92^x

Take log of both sides

log(0.2) = log(0.92^x)

Apply law of logarithm

log(0.2) = x\ log(0.92)

Make x the subject

x = \frac{log(0.2)}{log(0.92)}

x = \frac{-0.6990}{-0.0362}

x = 19.309

x \approx 19

<em>Hence, it takes approximately 19 days</em>

3 0
3 years ago
I need help with six and seven plz
kolbaska11 [484]

Answer:

6) 102

7) 58

NOTE: Supplementary add to 180° and Complementary add to 90°

<u><em>Please mark as brainliest if answer is right </em></u>

Have a great day, be safe and healthy  

Thank u  

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3 years ago
Your cost is $250.you increase by 125%.what is the selling price?
Vitek1552 [10]
The answer is $312.50
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