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insens350 [35]
3 years ago
10

What is the length of XY?

Mathematics
1 answer:
Hitman42 [59]3 years ago
4 0

Answer:

40

Step-by-step explanation:

If points A, B, C are midpoints of sides XY, YZ, ZX respectively. Then by midpoint theorem.

XY = 2BC

XY = 2*20

XY = 40

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Mike and alice recycled 147 bottles altogether. Mike recycled 6 times as many bottles as Alice. How many bottles did alive recyc
meriva

total=147

a:m

1:6 =7

147÷7=21

21×1=21

alice recycled 21 bottles

8 0
4 years ago
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Richard was thinking of a number. Richard adds 9.5 to the number, then doubles the result to get an answer of 59.4. Form an equa
Jet001 [13]
The answer is 49.9 because he thought of a number and added 9.5 and the result was 59.4 then you should do 59.4-9.5 and the answer is 49.9
7 0
3 years ago
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Find a quadratic polynomial with integer coefficients which has x = 2/9, ± SQRT23/9 as its real zeros.
melomori [17]

Answer:

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

Step-by-step explanation:

Statement is incorrectly written. Correct form is described below:

<em>Find a quadratic polynomial with integer coefficients which has the following real zeros: </em>x = \frac{2}{9}\pm \frac{\sqrt{23}}{9}<em>. </em>

Let be r_{1} = \frac{2}{9}+\frac{\sqrt{23}}{9} and r_{2} = \frac{2}{9}-\frac{\sqrt{23}}{9} roots of the quadratic function. By Algebra we know that:

y = (x-r_{1})\cdot (x-r_{2}) = x^{2}-(r_{1}+r_{2})\cdot x +r_{1}\cdot r_{2} (1)

Then, the quadratic polynomial is:

y = x^{2}-\frac{4}{9}\cdot x -\frac{19}{81}

y = 81\cdot x^{2}-36\cdot x -19

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

5 0
3 years ago
Please help me with this​ only c.
allsm [11]

Answer:

.

Step-by-step explanation:

8 0
3 years ago
Which expression is equivalent to (3m^-2n)^-3/6mn^-2
Luden [163]
We are asked to find the equivalent of the expression given:
(3m⁻² n)⁻³
-----------
6mn⁻²

Perform distribution of power using power rule such as shown below:
3⁻³ m⁻²*⁻³n⁻³
-----------------
6mn⁻²

Perform product and quotient rule such as shown below:
m⁶ n²
--------
3³ *6*m*n³

Simplify,
m⁵
--------
162n

The answer is m⁵/162n.
7 0
3 years ago
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