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3 years ago

In this triangle, =

Mathematics

1 answer:

gregori [183]3 years ago

8 0

A triangle is 180 degrees hopes this helps in anyway

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Write two expressions with unlike denominators whose sum is x-3/x+2, I need help it is confusing for me.

skad [1K]

Answer:

$\displaystyle A=\frac{x-2}{x+3}$

$\displaystyle B=\frac{-5}{(x+3)(x+2)}$

Step-by-step explanation:

We need to find two expressions with unlike denominators what sum

$\displaystyle S=\frac{x-3}{x+2}$

Let's suppose one of the expressions is:

$\displaystyle A=\frac{x-2}{x+3}$

Now we subtract S minus A to find the other expression B:

$\displaystyle B=S-A=\frac{x-3}{x+2}-\frac{x-2}{x+3}$

Multiply the first fraction by x+3 and the second by x+2;

$\displaystyle B=(x+3)\frac{x-3}{(x+3)(x+2)}-(x+2)\frac{x-2}{(x+3)(x+2)}$

Operating:

$\displaystyle B=\frac{x^2-9}{(x+3)(x+2)}-\frac{x^2-4}{(x+3)(x+2)}$

Subtracting both fractions with like denominators:

$\displaystyle B=\frac{x^2-9-(x^2-4)}{(x+3)(x+2)}$

Simplifying:

$\displaystyle B=\frac{-5}{(x+3)(x+2)}$

Thus the two expressions are:

$\displaystyle A=\frac{x-2}{x+3}$

And

$\displaystyle B=\frac{-5}{(x+3)(x+2)}$

8 0

3 years ago

Please help me with 1,2,3,4 and show me how you get it the answers

Dafna11 [192]

Answer:

Step-by-step explanation:

Use the formula of distance between the two points $(x_1,y_1)$ and $(x_2,y_2)$ ,

Distance = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

1. Distance between A(3, 4) and B(8, 12),

AB = $\sqrt{(8-3)^2+(12-4)^2}$

AB = $\sqrt{25+64}$

= $\sqrt{89}$

≈ 9.43

2. Distance between C(-2, 10) and D(3, -2),

CD = $\sqrt{(3+2)^2+(-2-10)^2}$

= $\sqrt{25+144}$

= $\sqrt{169}$

= 13.00

3. Distance between X(20, 4) and Y(17, 0),

XY = $\sqrt{(20-17)^2+(4-0)^2}$

= $\sqrt{3^2+4^2}$

= $\sqrt{25}$

= 5.00

4. Distance between E(2, -1) and M(6, 9),

EM = $\sqrt{(2-6)^2+(-1-9)^2}$

= $\sqrt{16+100}$

= $\sqrt{116}$

= 10.77

8 0

3 years ago

4.62 +3-3.6z = Answer plssss

Aneli [31]

Answer:

z = 2.12

Step-by-step explanation:

4.62 +3 - 3.6z = 0

7.62 - 3.6z = 0

-3.6z = -7.62

z = 2.12

6 0

3 years ago

A music school has budgeted to purchase 3 musical instruments. they plan to purchase a piano costing $4,000, a guitar costing $6

S_A_V [24]

To solve this, we can use the z statistic. The formula for z score is given as:

z = (x – u) / s

where x is the actual cost = 4000, u is the mean cost = 5000, and s is the standard deviation = 2000

Solving for z:

z = (4000 – 5000) / 2000

z = - 0.5

Therefore the piano cost is only 0.5 standard deviations below the average cost.

4 0

3 years ago

Estimate 40% of 128 Please help :c

Ivanshal [37]

Answer:

51.2 is 40% of 128

Step-by-step explanation:

3 0

3 years ago

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