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MAVERICK [17]
2 years ago
10

What does a letter with a line over it mean

Mathematics
1 answer:
Helga [31]2 years ago
7 0

Step-by-step explanation:

The line above the letter means "complement". If X is a set, the the complement of X (denoted by X with a line above it) is the set of all things not in X...If X is a set, then the complement of X (denoted by X with a line above it) is the set of all things not in X.

Sorry if it was complicated

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I only need help with number 9 plz
Varvara68 [4.7K]

Answer:

<h2>Letter C</h2>

Step-by-step explanation:

If we look on the number line we see that there is a point on -3, another point on -1, 2, and 7.

These points tell us our answer, but the question states it doesn't have to be in any order.

As we look at answer A we see -3, 1, 2, and -7. That's incorrect since there is no positive 1 nor an -7.

As we look at answer B we see -3, 7, 1, and -2. That's incorrect since there is no positive 1, and not a -2.

As we look at answer D we see -2, 3, 1, and 7. That's incorrect since there is no positive 2, no positive 3, and no negative 1.

C has to be the correct answer since it's the only answer left and has the 4 numbers that are on the number line.

Therefore, the correct answer is C.

Best of Luck to you.

If you have any questions, feel free to comment below.

6 0
3 years ago
Solve the system of equations using the linear combination method. {9x+5y=35 2x+5y=0 Enter your answers in the boxes.
Vikentia [17]
9x+ 5y=35
2x + 5y=0    |* -1

9x +5y= 35
-2x  -5y= 0
-----------------
7x /  = 35
x=35:7
x=5

2x+5y=0
2*5+5y=0
10+5y=0
5y=-10
y= -10:5
y=-2
5 0
3 years ago
Is the negative square root of 9 rational or irrational ​
Nana76 [90]

Answer:

Rational

Step-by-step explanation:

-9 is rational because 9 is a perfect square and all perfect squares are rational.

6 0
3 years ago
What is the place value of 9 in 49,254
MrRa [10]
9,000 nine thousands
7 0
3 years ago
Read 2 more answers
He formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved fo
Anni [7]
I think the answer is r=8..
hope this helps!:)
6 0
3 years ago
Read 2 more answers
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