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givi [52]
2 years ago
8

PLEASE HELP!!!!!! I HAVE BEEN STUCK FOR DAYS!!!!

Mathematics
1 answer:
Sveta_85 [38]2 years ago
3 0

Answer:

40 terms

Step-by-step explanation:

the sum to n terms of an arithmetic sequence is

S_{n} = \frac{n}{2} (a₁ + a_{n} )

then

\frac{n}{2} (- 4 - 82) = - 1720 ( multiply both sides by 2 to clear the fraction )

- 86n = - 3440 ( divide both sides by - 86 )

n = 40

the series has 40 terms

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A computer randomly puts a point inside the rectangle. What is the probability that the point lands in triangle T?
Serjik [45]

Answer:

87.5%

Step-by-step explanation:

The area of the entire rectangle is 8 by 6,

8x6=48 so the area is 48 units^2.

The area of the triangle is A=1/2bh

A=1/2(2)(6)

A=1(6)

A=6 units^2

6/48=0.125

0.125=12.5%

You need to find the percent it will not land in the triangle, so subtract 12.5 from 100.

100-12.5=87.5

There is an 87.5% chance it will not land in the triangle

3 0
3 years ago
Solve 4x2-25&lt;0<br><br> in words 4x squared -minus 25 &lt; 0
muminat
<h3>I'll teach you how to solve 4x^2-25<0</h3>

-------------------------------------------------

4x^2-25<0

Add 25 to both sides:

4x^2-25+25 < 0+25

Simplify:

4x^2 < 25

Divide both sides by 4:

4x^2/4 < 25/4

Simplify:

x^2 < 25/4

whole sqrt -25/4 < x < whole sqrt 25/4

whole sqrt 25/4= 5/2

-5/2 < x < 5/2

Your Answer Is -5/2 < x < 5/2

plz mark me as brainliest if this helped :)

4 0
3 years ago
Is the following a function? (2,5),(-9,5), (1,8), (3,2), (-2,1)? <br> A.yes<br> B.no
ohaa [14]

Answer:

Yes

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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Mazyrski [523]

Direct variation is is when the x and y a direct relation

without constants added or subtracted

With being times by each other

so the only one that meets the definite is the first one

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7 0
3 years ago
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Harman [31]

Answer:

<u>After July, Ana's monthly salary was $1920</u>

Step-by-step explanation:

In May, Ana's monthly salary was $2000. During the next month, the salary increased by 20%, or (0.2)(2000)

2000+(0.2)(2000)=2000+400=2400

So, in June, Ana's monthly salary was $2400. During the next month, the salary decreased by 20%, or (0.2)(2000)

2400-(0.2)(2400)=2400-480=1920

Therefore, after the two changes, Ana's monthly salary was <u>$1920</u>

3 0
1 year ago
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