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3 years ago

Here is an equation: 4x - 4 = 4x + _____. What could you write in the blank so the equation would be True for one value of x.

Mathematics

2 answers:

vitfil [10]3 years ago

8 0

Answer is -4. adding a negative is the same as subtracting a positive!

gogolik [260]3 years ago

6 0

Answer:

-4

Step-by-step explanation:

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4) 65% of 11 is what?

Alchen [17]

Answer:

7.15

Step-by-step explanation:

8 0

3 years ago

Can you help me solve for n n/-4+-21=13

lions [1.4K]

Answer:

n= -136

Step-by-step explanation:

3 0

3 years ago

The sum of z and 7? What is it plz

wolverine [178]

Answer:

z + 7

Step-by-step explanation:

Step 1: Convert words into an expression

The sum of z and 7

z + 7

Answer: z + 7

If needed solve:

z + 7 - 7 = 0 - 7

z = -7

5 0

3 years ago

Read 2 more answers

The students are selling cookies at a school fair. Sara is selling three chocolate chip cookies for $2.49.

yan [13]

3 chocolate chip cookies - $2.49 .

So 1 chocolate chip cookies costs 2.49/3=$0.83

1 chocolate chip cookie costs $0.83

20 chocolate chip cookies cost 0.83*20=$16.6

Full credits to a Brainley User.

4 0

3 years ago

The population of rabbits on an island is growing exponentially. In the year 1990, the population of rabbits was 1200, and by 19

kobusy [5.1K]

Answer:

2023 rabbits

Step-by-step explanation:

The exponential model consists of the following expression:

$y = A \cdot r^{t}$

Where:

$A$ - Initial population.

$r$ - Increase rate.

$t$ - Time

$y$ - Current population.

The initial population and increase rate are, respectively:

$1200 = A \cdot r^{0}$

$A = 1200$

$1700 = 1200 \cdot r^{4}$

$r^{4} = \frac{1700}{1200}$

$r^{4} = \frac{17}{12}$

$r = \sqrt[4]{\frac{17}{12} }$

$r \approx 1.091$

The exponential model that predicts the population of rabbits is:

$y = 1200\cdot 1.091^{t}$

Lastly, the expected population for the year 1996 is:

$y = 1200\cdot 1.091^{6}$

$y\approx 2023.624\,rabbits$

5 0

3 years ago