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3 years ago

14

Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation i

s true or false. am i right?

1 answer:

Sphinxa [80]3 years ago

8 0

Yes you’re right you cannot know if the equation is true or false

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What's the difference between R300 and -R300 on a bank statement?

bogdanovich [222]

Answer:

R300 is positive number but -R300 is negative so, on a bank statement R300is thousand times larger than -R300

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2 years ago

write a linear equation that intersects y=x^2 at two points. Then write a second linear equation that intersects y=x^2 at just o

Liula [17]

We know that $y = x^2$ is a parabola, concave up, with vertex in the origin $(0,0)$

So, we may use three horizontal lines for our purpose: any horizontal line above the x axis will intersect the parabola twice. The x axis itself intersects the parabola once on the vertex, while any horizontal line below the x axis won't intercept the parabola.

Here's the examples:

The horizontal line $y = 4$ intercepts the parabola twice: the system $y = x^2,\ y = 4$ is solved by $x^2=4 \implies x = \pm 2$
The horizontal line $y=0$ intercepts the parabola only once: the system is $y=x^2,\ y=0$ which yields $x^2=0\implies x=0$ which is a repeated solution
The horizontal line $y=-5$ intercepts the parabola only once: the system is $y=x^2,\ y=-5$ which yields $x^2=-5$ which is impossible, because a squared number can't be negative.

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3 years ago

Find the pair of numbers whose sum is 68 and whose product is a maximum.

Aleksandr-060686 [28]

34 and 34 I’m pretty sure

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2 years ago

Is this polygon regular or irregular?<br><br><br> irregular <br> regular

tatuchka [14]

Answer: irregular

Step-by-step explanation:

it is irregular because its sides are not equal

7 0

3 years ago

Read 2 more answers

The distribution of the amount of turkey individual Americans eat in a year is approximately normal with an average of 16.7 poun

Mumz [18]

Answer:

82.88%

Step-by-step explanation:

Given that:

Mean (μ) = 16.7 pounds

Standard deviation (σ) = 3.8 pounds

Number of pounds eaten = 11.5 = x

P(11.5 ≥ x ≤11.5)

P(x ≤ 11.5) :

Zscore = (x - μ) / σ

Zscore = (11.5 - 16.7) / 3.8

Zscore = - 5. 2 / 3.8

Zscore = −1.368421

P(Z ≤ - 1.3684) = 0.085593 (Z probability calculator)

P(x ≥ 11.5) ;

Zscore = (x - μ) / σ

Zscore = (11.5 - 16.7) / 3.8

Zscore = - 5. 2 / 3.8

Zscore = −1.368421

P(Z ≥ - 1.3684) = 0.91441 (Z probability calculator)

P(Z ≥ - 1.3684) - P(Z ≤ - 1.3684)

0.91441 - 0.085593 = 0.828817

0.828817 * 100% = 82.88%

5 0

3 years ago