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3 years ago

True or False: When completing the square, the first step is to double the middle term.

Mathematics

1 answer:

andrew11 [14]3 years ago

6 0

Answer:

true?

Step-by-step explanation:

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Order the decimals from least to greatest.0.38, 0.4, 0.36 (Increasing - small to blg)

Alex777 [14]

Answer:

0.36, 0.38, 0.4

Step-by-step explanation:

6 0

3 years ago

The time required for Rs 2500 to yield Rs 300 as simple interest at 8% is

ser-zykov [4K]

I think its 2.5yrs

yeah thank you pls give me correct answer if I am wrong

3 0

3 years ago

Identify the number that is 9.5 units from 2 on a number line

dusya [7]

There are two such numbers.

One of them is 2 + 9.5 = 11.5.

The other one is 2 - 9.5 = -7.5.

_____

If we consider "9.5 units from 2" to be 9.5 units in the positive direction, then the appropriate choice is 11.5.

6 0

3 years ago

How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from 20°F to 45°F

Ira Lisetskai [31]

Answer:

a) x = 80.40

s = 29.54

b) lower limit = 69.53

upper limit = 91.27

Step-by-step explanation:

The mean price is:

$\bar X=\frac{1}{n}\sum x_i=\frac{1}{20}(50+80+...+70)=\frac{1608}{20} =80.40$

The standard deviation is

$s=\sqrt{\frac{1}{n-1}\sum(x_i-\bar X)^2}=\sqrt{\frac{1}{19}[(50-80.4)^2+...+(70-80.4)^2]} \\\\s=\sqrt{\frac{15,471}{19} }=\sqrt{814.25} =29.54$

We have to calculate a 90% CI for the mean.

The z-value for a 90% confidence interval is z=1.645.

The margin of error is:

$E=z\cdot \sigma / \sqrt{n}=1.645*29.54/\sqrt{20}=48.59/4.47=10.87$

The 90% CI is

$\bar X-z\sigma/\sqrt{n} \leq \mu \leq \bar X-z\sigma/\sqrt{n}\\\\80.40-10.87 \leq \mu \leq 80.40+10.87\\\\69.53\leq \mu \leq 91.27$

4 0

4 years ago

Ben runs 3/4 mile each day.How many Miles Does ben run in 12 days

Gnom [1K]

Answer:

9 miles

Step-by-step explanation:

0.75x12=9

75x120=90

90/10=9

7 0

3 years ago