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sergiy2304 [10]
2 years ago
6

What is the value of 2x^2 when x= -3

Mathematics
1 answer:
olga nikolaevna [1]2 years ago
7 0

Answer:

C) 18

Step-by-step explanation:

Substitute x=-3 into the expression:

2(-3)² = 2(9) = 18

Therefore, C is correct

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The area model shows 3 1/4 what is 3 Times 3 1/4
Aneli [31]

Answer:

Concept: Basic Multiplication

  1. You have 3 1/4 which can be said in decimal form to be 3.25
  2. You multiply it by 3 to get 9.75 or 9 3/4
  3. Hence D
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Three sailors were marooned on a deserted island that was also inhabited by a band of monkeys. The sailors worked all day to col
noname [10]

Step-by-step explanation:

x-the initial number of coconuts

x=3y+1

2y=3z+1

2z=3×7+1=>z=11=>y=17=>x=52

7 0
3 years ago
If y varies directly as x and y = 21 when x = 5, find x when y = 42.
Lorico [155]

Answer: 10

<u>Step-by-step explanation:</u>

varies directly means: \frac{y}{x} = k

Step 1: solve for k   ⇒  \frac{21}{5} = k

Step 2: plug in the given value and k to solve for the missing value: \frac{42}{x} = \frac{21}{5}

42(5) = 21(x)

\frac{42(5)}{21} = \frac{21(x)}{21}

2(5) = x

10  = x


5 0
3 years ago
6 red marbles out of 36 marbles
Andreyy89

Answer:

1/6

Step-by-step explanation:

P(red) = red/total

             =6/36

             =1/6

6 0
3 years ago
A colony contains 1500 bacteria. The population increases at a rate of 115% each hour. If x represents the number of hours elaps
Burka [1]

Answer:Answer:

Option (c) is correct.

function representing the increase of bacteria every hour x,

Step-by-step explanation:

Given : A colony contains 1500 bacteria. The population increases at a rate of 115% each hour.

we have to find the function that represents the given scenario.

Let x represents the number of hours elapsed.

Given  A colony contains 1500 bacteria

and number of bacteria is increasing at a rate of 115% each hour.

Using formula for Compound interest , we have,

Where A is amount

T is time period

R is rate of interest

Here, P = 1500

T = x hours

R = 115%

Let f(x) be the function representing the increase of bacteria every hour.

Substitute, we have,

Simplify, we get,

Thus,  function representing the increase of bacteria every hour x,

5 0
3 years ago
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