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3 years ago

Which equation can be rewritten as x + 4=x2 assume x>0

Mathematics

1 answer:

antoniya [11.8K]3 years ago

5 0

I'm guessing that x2 is an x to the power of 2, so u can rewrite that as:

x^2 - x - 4

from there you can use completing the square, quadratic function, or factoring.

If the x2 is supposed to be 2x then it would just be as follows:

x - 4

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The perimeter of a rectangular playground is 494 yards. The length of the playground is 7 more than twice the width. Find the le

lbvjy [14]

Answer:

https://youtu.be/wOH_gVtidns

I recorded a video of myself explaining it hope it helps ;)

Step-by-step explanation:

6 0

2 years ago

At pretend highschool there are 325 boys and 275 girls.

RideAnS [48]

Answer:

13:11

Step-by-step explanation:

325:275

If divided by 5 all through, you get 65:55, then by 5 again you get 13:11

7 0

3 years ago

Read 2 more answers

4.2 divided by 8.19 =

Damm [24]

Well, 4.2 divided by 8.19 = 0.51282051282 But if you switch it to 8.19 divided by 4.2 that would equal 1.95

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3 0

4 years ago

Read 2 more answers

The measure of the perimeter of a triangle is 37s+ 42. It is known that two of the sides of the triangle hare measures of 14s+ 1

ale4655 [162]

Answer:

13s+6

Step-by-step explanation:

the length of the third side =

37s+42- (14s+16+10s+20) =

37s+42 - 24s -36 =

13s+6

7 0

3 years ago

In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-s

Radda [10]

Answer:

68%

Step-by-step explanation:

The Standard Deviation Rule = Empirical rule formula states that:

68% of data falls within 1 standard deviation from the mean - that means between μ - σ and μ + σ.

95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ.

99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ.

From the question,

Step 1

We have to find the number of Standard deviation from the mean. This is represented as x in the formula

μ = Mean = 61

σ = Standard Deviation = 8

For x = 53

μ - xσ

53 = 61 - 8x

8x = 61 - 53

8x = 8

x = 8/8

x = 1

For x = 69

μ + xσ

69 = 61 + 8x

8x = 69 - 61

8x = 8

x = 8/8

x = 1

This falls within 1 standard deviation of the mean where: 68% of data falls within 1 standard deviation from the mean - that means between μ - σ and μ + σ.

Therefore, according to the Standard Deviation Rule, the approximate percentage of daily phone calls numbering between 53 and 69 is 68%

3 0

3 years ago