3. Solve: -2 + (2)- 3 - (-1) A. 1 1 ola -

A. 5x10 to the third power

tatiyna

Answer:

5000

Step-by-step explanation:

6 0

3 years ago

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What are the r- values of the following data to three decimal places?

Olin [163]

Answer:

Option D. -0.901

Step-by-step explanation:

we know that

The correlation coefficient r measures the strength and direction of a linear relationship between two variables. The value of r is always between +1 and –1

Using a Excel tool (Correl function)

The value of coefficient r is -0.9006876

Round to three decimal places

r=-0.901

see the table attached

7 0

3 years ago

Please help!! I'm really confused

Readme [11.4K]

Answer:

Point a is correct.

Step-by-step explanation:

hope I helped.

8 0

4 years ago

I need help please somebody answer ASAP please I’d highly appreciate it

ss7ja [257]

Answer:

2.(b) w= 3

3. x= -3 or x= 3

Step-by-step explanation:

2.(b) Method 1:

$\frac{2w - 1}{5} + w + 2 = 2w \\ \frac{2w - 1}{5} = 2w - w - 2 \\$

Simplify:

$\frac{2w - 1}{5} = w - 2$

×5 on both sides:

$2w - 1 = 5(w - 2)$

Expand:

$2w - 1 = 5w - 10$

Bring constants to 1 side, w terms to the other:

$5w - 2w = 10 - 1$

Simplify:

$3w = 9$

Divide both sides by 3:

$w = 9 \div 3 \\ w = 3$

Method 2:

$\frac{2w - 1}{5} + w + 2 = 2w$

Multiply by 5 throughout:

$2w - 1 + 5(w + 2) = 5(2w)$

Expand:

$2w - 1 + 5w + 10 = 4w$

Simplify:

$7w - 9 = 4w$

+9 on both sides:

$7w = 4w + 9$

-4w on both sides:

$7w - 4w = 9$

Simplify:

$3w = 9$

Divide by 3 on both sides:

$w = 3$

3. $\frac{6x - 12}{3} + 4 = \frac{18}{x}$

Multiply by 3x on both sides:

$\frac{3x(6x - 12)}{3} + 3x(4) = \frac{3x(18)}{x} \\ x(6x - 12) + 12x = 3(18)$

Expand:

$x(6x) - x(12) + 12x = 54 \\ 6x^{2} - 12x + 12x = 54 \\$

Simplify:

$6 {x}^{2} = 54$

Divide by 6 on both sides:

${x}^{2} = 9$

-9 on both sides:

${x}^{2} - 9 = 0$

Factorise:

*Since a²-b²= (a +b)(a -b),

${x}^{2} - {3}^{2} = 0 \\ (x + 3)(x - 3) = 0$

Thus,

x +3= 0 or x -3= 0

x= -3 or x= 3

8 0

3 years ago

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Question 3 : enlarge each shape by the scale factor given a) enlager by scale factor -2 using (0,0) as the center of enlargement

Hoochie [10]

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete, as the shapes or their coordinates are not given.

The general explanation, however, is as follows:

To dilate a shape around the origin (i.e. (0,0)), we simply multiply the side length of the shape or the coordinates of the shapes by the scale factor.

Take for instance:

A triangle of side lengths 3,4,5 dilated around the origin by a scale factor of 2.

The new triangle will have 6, 8 and 10 as its side lengths (i.e. we multiply 3, 4 and 5 by 2).

Another instance is:

A rectangle with the following coordinates: (1,1) (4,1), (4,5) and (1,5)

When dilated around the origin by a scale factor of 2, the new rectangle will have the following coordinates: (2,2) (8,2), (8,10) and (2,10)

3 0

3 years ago