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3 years ago

What’s the answer please help..............

Mathematics

1 answer:

kupik [55]3 years ago

3 0

Answer:

(-2, -5)

Step-by-step explanation:

in a rectangle there will be 4 different numbers. Each number will have 2 spots. 2 numbers will have 2 x spots, and 2 numbers will have 2 y spots. we notice that our numbers are -2, -5, 3, and 4.

we see that -2 and 3 are our x values, and -5 and 4 are our y values.

-2 and -5 are the 2 numbers that have not been repeated, so the last corner's coordinates are (-2,-5)

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3 years ago

1. Determine if the lengths 9 cm, 13 cm, and 23 cm can form a triangle.

laila [671]

A tell me out of 9 13 23
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2 years ago

You believe the population is normally distributed. Find the 80% confidence interval. Enter your answer as an open-interval (i.e

victus00 [196]

You intend to estimate a population mean μ from the following sample. 26.2 27.7 8.6 3.8 11.6 You believe the population is normally distributed. Find the 80% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to twp decimal places.

Answer:

The Confidence interval = (8.98 , 22.18)

Step-by-step explanation:

From the given information:

mean = $\dfrac{ 26.2+ 27.7+ 8.6+ 3.8 +11.6 }{5}$

mean = 15.58

the standard deviation $\sigma$ = $\sqrt{\dfrac{\sum(x_i - \mu)^2 }{n}}$

the standard deviation = $\sqrt{\dfrac{(26.2 - 15.58)^2 +(27.7 - 15.58)^2 +(8.6 - 15.58)^2 + (3.8 - 15.58)^2 + (11.6 - 15.58)^2 }{5 } }$

standard deviation = 9.62297

Degrees of freedom df = n-1

Degrees of freedom df = 5 - 1

Degrees of freedom df = 4

For df at 4 and 80% confidence level, the critical value t from t table = 1.533

The Margin of Error M.O.E = $t \times \dfrac{\sigma}{\sqrt{n}}$

The Margin of Error M.O.E = $1.533 \times \dfrac{9.62297}{\sqrt{5}}$

The Margin of Error M.O.E = $1.533 \times 4.3035$

The Margin of Error M.O.E = 6.60

The Confidence interval = ( $\mu \pm M.O.E$ )

The Confidence interval = ( $\mu + M.O.E$ , $\mu - M.O.E$ )

The Confidence interval = ( 15.58 - 6.60 , 15.58 + 6.60)

The Confidence interval = (8.98 , 22.18)

7 0

3 years ago

When the square of a certain number is diminished by 9 times the number the result is 36?

ArbitrLikvidat [17]

X²-9x=36
minus 36 both sides
x²-9x-36=0
what 2 numbers multiply to -36 and add to -9
-12 and 3
(x-12)(x+3)=0
set to zero
x-12=0
x=12

x+3=0
x=-3

the number is either -3 or 12

3 0

3 years ago

A door to a playhouse is 50 inches tall. Which of the following is another measure equal to the height?

sashaice [31]

Answer:

A. 4 ft 2 in.

Step-by-step explanation:

50/12 = 4.1666667. Round up, so 4.1666667 becomes 4.2.

8 0

3 years ago

Read 2 more answers