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Ksivusya [100]
3 years ago
8

Find the missing side of this right

Mathematics
1 answer:
I am Lyosha [343]3 years ago
6 0

Answer:

Step-by-step explanation:

square of 15 + square of x = square of 21

225 + square of x = 441

441 - 225 = 216

x = 216

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It is known that the point P(-9,18) belongs to the graph of the function y=k/x. Find k.
riadik2000 [5.3K]

Answer:

k = (-162).

Step-by-step explanation:

A point of the form (x_{0},\, y_{0}) belongs to the graph of this function, y = k / x, if and only if the equation of this function holds after substituting in x = x_{0} and y = y_{0}.

The question states that the point (-9,\, 18) belongs to the graph of this function. Thus, the equation of this function, y = k / x, should hold after substituting in x = (-9) and y = 18:

y = k / x.

18 = k / (-9).

Solve this equation for the constant k:

\begin{aligned}k &= 18 \times (-9) \\ &= (-162)\end{aligned}.

Thus, k = (-162).

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5 0
2 years ago
What two numbers have a sum of 217 and a difference of 85?
KiRa [710]
We can use the system of equations:x + y = 217x - y = 85-----------------From the 2nd equation:  y = x - 85x + x - 85 = 2172 x = 217 + 852 x = 302x = 302 : 2x = 151y = 217 - 151y = 66We can prove this solution:151 + 66 = 2017   and  151 - 66 = 85.Answer: those numbers are 151 and 66.

3 0
3 years ago
How can u use a number line to find the sum of -4 and 6
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Go to the right 6 place values (+6)

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