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3 years ago

Solve the equation x² = 5. (must show equality properties in work so I can earn full credit)

Mathematics

2 answers:

natita [175]3 years ago

8 0

X² = 5
take root to both side to clear the square

√x² = ±√5

X = ±√5

yulyashka [42]3 years ago

4 0

The awnser is c. I really hope this helps

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If the coefficient of determination for a data set is 0.25 and the SSE for the data set is 6, what is the SST for the data set ?

Cerrena [4.2K]

Answer: The SST for the data set is 8.

Step-by-step explanation:

Since we have given that

Coefficient of determination (R²) = 0.25

SSE for the data = 6

SST = ?

As we know the formula for coefficient of determination:

$R^2=1-\dfrac{SSE}{SST}\\\\0.25=1-\dfrac{6}{SST}\\\\0.25-1=-\dfrac{6}{SST}\\\\-0.75=-\dfrac{6}{SST}\\\\SST=\dfrac{6}{0.75}\\\\SST=8$

Hence, the SST for the data set is 8.

7 0

4 years ago

Read 2 more answers

a television on sale for 1/4 off original price. Original price is 120 more then sale price. What is original price of tv

agasfer [191]

Answer:

Original Price = 160

Sale Price =40

Step-by-step explanation:

Let Original Price be x and Sale Price be y

y=1/4 of x (Equation 1)

x=120+y (Equation 2)

Put value of x from equation 2 in equation 1

y= (1/4)*(120+y)

y=120/4 + y/4

y-y/4=30

3y/4=30

y=30*4/3

y=40

Put value of y in Equation 2

x=120+40

x=160

4 0

3 years ago

8.)What is the Measurement of angle 2? 9.) What is the measure of angle 7?

EastWind [94]

Answer:

angle 2 = 90° {corresponding angles}

angle 7 + angle 5 = 180° {linear pair}

or, angle 7 + 100° = 180° {angle 5 is corresponding to 100°}

so, angle 7 = 80°

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2 years ago

Plzz help only 10 minutes left to finish

Svet_ta [14]

I’m really sorry I’m not sure

5 0

3 years ago

The weight of an object rounds to 41.3 kilograms select the three posible weights that correctly round to 41.3 kilograms

nekit [7.7K]

Answer:

See Explanation

Step-by-step explanation:

Given

$Weight = 41.3kg$

Required

Determine the weights that approximates to 41.3kg

The options are not given but the question is still solvable

In approximation:

0 - 4 approximates to 0

This implies that:

41.30 to 41.34 approximates to 41.3

Also:

5 - 9 approximates to 1

This implies that:

41.25 to 41.29 approximates to 41.3

Bring the range together, we have:

$Range = 41.25\ to\ 41.34$

Select any three numbers within this range, and you have your answer

Examples are: 41.25, 41.28, 41.34\

4 0

4 years ago