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2 years ago

X²-9y²can someone assist plz

Mathematics

1 answer:

Annette [7]2 years ago

3 0

Answer:

${x}^{2} - 9 {y}^{2} \\ = {x}^{2} - {3}^{2} {y}^{2} \\ = {x}^{2} - {(3y)}^{2} \\ = (x - 3y)(x + 3y)$

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What is the solution to the equation 3.6m − 2.7 = −1.8m?

Finger [1]

Answer:

Option B is correct

m = 0.5 is the solution to the equation

Step-by-step explanation:

Given the equation:

$3.6m-2.7= -1.8m$

Add 2.7 to both sides, we have;

$3.6m-2.7+2.7= -1.8m+2.7$

Simplify:

$3.6m = -1.8m+2.7$

Add 1.8 m to both sides we have;

$5.4m =2.7$

Divide both sides by 5.4 we have;

$m = \frac{1}{2} = 0.5$

⇒m = 0.5

Therefore, the solution for the given equation is, 0.5

7 0

2 years ago

Read 2 more answers

What is the distance beween the points (3,6) and (4,2)

Reil [10]

The answer is sqrt17 or 4.123

3 0

2 years ago

In the diagram, ΔGHJ ≅ ΔSTU.

Anna007 [38]

Step-by-step explanation:

angle J is also 67 deg since the triangle is an isosceles triangle

angle T is 67 deg since the 2 triangles are congruent

angle G = 180 - 2x67 = 46 deg

ST is 5cm

HJ is 3.7cm

3 0

1 year ago

A regression equation was estimated as = –100 + 0.5x. if x = 20,the predicted value of y is _____.

ratelena [41]

Any answer things? :|

5 0

3 years ago

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd =

swat32

Answer:

Test statistic, $t_{s} = -0.603$ (to 3 dp)

Step-by-step explanation:

Deviation, d = x -y

Sample mean for the deviation

$\bar{d} = \frac{\sum x-y}{n}$

$\bar{d} = \frac{(28-6) + (31-27)+(20-26)+(25-25)+(28-29)+(27-32)+(33-33)+(35-34)}{8} \\\bar{d} = -0.625$

Standard deviation: $SD = \sqrt{\frac{\sum d^{2} - n \bar{d}^2}{n-1} }$

$\sum d^{2} = (28-26)^2 + (31-27)^2 +(20-26)^2 +(25-25)^2 +(28-29)^2 +(27-32)^2 +(33-33)^2 +(35-34)^2\\\sum d^{2} = 63$

$SD = \sqrt{\frac{63 - 8 * (-0.625)^2}{8-1} }$

SD =2.93

Under the null hypothesis, the formula for the test statistics will be given by:

$t_{s} = \frac{ \bar{d}}{s_{d}/\sqrt{n} } \\t_{s} = \frac{- 0.625}{2.93/\sqrt{8} }$

$t_{s} = -0.6033$

6 0

2 years ago

X²-9y²can someone assist plz​

X²-9y²can someone assist plz