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3 years ago

Z is twelve less than the sum of x and y

Mathematics

2 answers:

Furkat [3]3 years ago

7 0

X+y-12=z
EXPLANATION:

Kaylis [27]3 years ago

7 0

Answer:

z= (x+y) -12

Step-by-step explanation:

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Roster method of A = {x | x is an odd number and 20 < x < 30}

Sunny_sXe [5.5K]

A "roster" here is essentially a version of the set with all of elements listed out. Here, those elements are all of the odd numbers between 20 and 30, so our list would be

{21, 23, 25, 27, 29}

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3 years ago

How does a perpendicular bisector justify sss triangle congruence theorem?

Semmy [17]

Intersects a given segment at a 90 degree angle,and passes through the given segment's midpoint.

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2 years ago

Given $m\geq 2$, denote by $b^{-1}$ the inverse of $b\pmod{m}$. That is, $b^{-1}$ is the residue for which $bb^{-1}\equiv 1\pmod

goblinko [34]

$(2+3)^{-1}\equiv5^{-1}\pmod7$ is the number L such that

$5L\equiv1\pmod7$

Consider the first 7 multiples of 5:

5, 10, 15, 20, 25, 30, 35

Taken mod 7, these are equivalent to

5, 3, 1, 6, 4, 2, 0

This tells us that 3 is the inverse of 5 mod 7, so L = 3.

Similarly, compute the inverses modulo 7 of 2 and 3:

$2a\equiv1\pmod7\implies a\equiv4\pmod7$

since 2*4 = 8, whose residue is 1 mod 7;

$3b\equiv1\pmod7\implies b\equiv5\pmod7$

which we got for free by finding the inverse of 5 earlier. So

$2^{-1}+3^{-1}\equiv4+5\equiv9\equiv2\pmod7$

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Then L - R = 1.

6 0

2 years ago

The product of n and 8

Jlenok [28]

Answer:

Step-by-step explanation:

The product of n and 8 means you will multiply n and 8. So, n x 8 is 8n.

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3 years ago

Expand & simplify 4(x+6)+4(x-5)

EleoNora [17]

[Answer]

$\boxed{8x \ + \ 4}$

[Explanation]

4(x + 6) + 4(x - 5)

[Expand] 4(x + 6): 4x + 24

4x + 24 + 4(x - 5)

[Expand] 4(x - 5): 4x - 20

4x + 24 + 4x + 20

[Simplify] 4x + 24 + 4x - 20: 8x + 4

= 8x + 4

$\boxed{[ \ Eclipsed \ ]}$

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3 years ago