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maw [93]
3 years ago
8

What does An-1 mean

Mathematics
1 answer:
Korolek [52]3 years ago
7 0

Answer:

its a formula

Step-by-step explanation:

an=a1+(n-1)d

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What is the area of triangle HGF? Round your answer to the nearest tenth of a square centimeter. Recall that you need to round u
denpristay [2]

Answer:

9.8

Step-by-step explanation:

The formula for the area of a triangle is a=bh/2, where a is area, b, is the base, and h is the height. If we substitute the values in the question in the equation, we get:

a=(6.5*3)/2

a=19.5/2

a=9.75

a≈9.8

7 0
2 years ago
This box plot shows information about the marks scored in a test.
aliina [53]
Since 120 students gained less than 70, and 70 is the upper quartile, 120 people are in the 75% of all the students so we need to find the total number of students.
we need to multiply 0.75 (75%) by something to get 120. which is 160 (the total number of all students).
and since 48 is the median score, find 50% of 160 which is 80!
hope this helps :)
4 0
2 years ago
What’s the area of the trapezoid?
myrzilka [38]

Answer:

I think its 28 feet

Step-by-step explanation:

2x2=4

3x8=24

24+4=28 ft

7 0
3 years ago
Read 2 more answers
Can someone help me with these problems step by step? It’s pre-algebra so it’s not rlly that hard.
gtnhenbr [62]

Answer:

11

Step-by-step explanation:

√121=11 so right answer is B

5 0
3 years ago
Factorize completely <br> 81k^2 - m^2
Genrish500 [490]

81k^2 - m^2 factors to

(9k + m)(9k - m)

Prove this by FOILing.

First - 81k^2

Outer - (-9km)

Inner - 9km

Last - (-m^2)

Put it into equation form

81k^2 - 9km + 9km - m^2

And combine terms to get the original equation,

81k^2 - m^2.

⭐ Answered by Hyperrspace (Ace) ⭐

⭐ Brainliest would be appreciated, I'm trying to reach genius! ⭐

⭐ If you have questions, leave a comment, I'm happy to help! ⭐

7 0
3 years ago
Read 2 more answers
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