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g100num [7]
4 years ago
7

Evaluate each expression 1/7 +- 5/7

Mathematics
1 answer:
Zigmanuir [339]4 years ago
6 0

Answer:

-4/7

Step-by-step explanation:

the expression already has the common denominator so all you have to do is add the numerator (1 and -5) which is -4.

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What are the solution(s) of the quadratic equation x2 = -98?
iren2701 [21]

Answer:

A

Step-by-step explanation:

x2 = -98

x =+-√-98

x = +-√49 • 2 • -1

x = +-7√2 • -1

x = +-7i√2

(Note: i = √-1 and i^2 = -1, so you can interchange the values)

8 0
3 years ago
Help!! Ur the best if u can help!
Sergeu [11.5K]

Answer:

A

Step-by-step explanation:

5 0
3 years ago
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Find the value of each variable. If you give the decimal value, round to the nearest tenth.
DiKsa [7]

u = 10.4 and v = 12

Solution:

In the given 2 sides of a triangle are 60°, 60°.

Sum of all the angles of a triangle = 180°

60° + 60° + third angle = 180°

⇒ third angle = 180° – 60° – 60°

⇒ third angle = 60°

All angles are equal, therefore the given triangle is an equilateral triangle.

⇒ All sides are equal in length.

⇒ v = 12

The line drawn from the top angle divides the triangle into two equal parts

and the line is perpendicular.

12 ÷ 2 = 6

Using Pythagoras theorem,

\text{Base}^2+\text{Opposite}^2=\text{Hypotenuse}^2

⇒ 6^2+\text{opposite}^2=12^2

⇒ 36+\text{opposite}^2=144

⇒ \text{opposite}^2=108

⇒ \text{opposite}=6\sqrt3=10.4

⇒ u = 10.4

Hence, u = 10.4 and v = 12.

7 0
3 years ago
A survey of 500 students in a school found that about 100 households consist of only vegetarians, 240 consist of vegetarians and
RideAnS [48]
100+160/500 consist of only vegetarians, or only non-vegetarians, which equal 260/500=13/25 probability. ☺☺☺☺
4 0
4 years ago
2(3/5n +3) - (2/3n-1)
borishaifa [10]

Hey there! :)


2(3/5n + 3) - (2/3n - 1)


Simplify.


(2 * 3/5n) + (2 * 3) - (2/3n -1)


Simplify.


6/5n + 6 - 2/3n + 1


Add like terms.


(6/5n - 2/3n) + (6 + 1)


Make the fractions have the same denominator by multiplying fraction 1 (6/5n) by 3/3 and fraction 2 (-2/3n) by 5/5.


6/5n * 3/3 = 18/15n


-2/3n * 5/5 = -10/15n


So, our new equation looks like this : (18/15n - 10/15n) + (6 + 1)


Simplify.


8/15n + 6 —> final answer.


Hope this helped! :)

4 0
3 years ago
Read 2 more answers
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