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marusya05 [52]
3 years ago
6

Find S25 for (-7) + (-2) + 3 + 8 +...

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
3 0
a_1=-7 \\ a_2=-2 \\  \\ d=a_2-a_1=-2-(-7)=5 \\  \\  \\ S_{25}= \cfrac{2(-7)+(25-1)5}{2}\cdot25 = \cfrac{-14+120}{2}\cdot25 =\cfrac{106}{2}\cdot25 =1325

Your answer is B. 1325
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a preschool student finds a big bag of cookies and begins to take the cookies from the bag and hide them in her cubbyhole. after
guajiro [1.7K]

Answer:She will count the cookies by 2's

Step-by-step explanation:

6 0
3 years ago
What is the Y-Intercept of the line:<br> Y - 5 = x + 5
frez [133]

Answer:

10

Step-by-step explanation:

isolate y by adding 5 to each side. Now you have y=x+10. 10 is the c value, which is the y-intercept

5 0
3 years ago
When six times a number is decreased by five, the result is 49. what is the number?
solong [7]
Put this into an equation. Make the missing value "x".
6x - 5 = 49
49 + 5 = 54
54 / 6 =  9 
x = 9.
The missing number is 9.

Hope This Helps You!
Good Luck Studying :)




3 0
3 years ago
Suppose thirty-two students signed up for classes during an orientation session. If
Elis [28]

Answer:

36

Step-by-step explanation:

add the total that signed up for chemistry with the total that signed up for english which would be 20+16=36

4 0
3 years ago
Determine the measure of ∠Y. images attached
Gwar [14]

Answer:

<h3>The answer is option C</h3>

Step-by-step explanation:

Since it's a right angled triangle we can use trigonometric ratios to find the value of ∠Y

To find the value of ∠Y we use tan

We have

\tan(∠Y)  =  \frac{25}{20}  \\  \tan(∠Y)  =  \frac{5}{4}  \\ ∠Y =  { \tan^{ - 1} } \frac{5}{4}  \\ ∠Y = 51.34019...

We have the final answer as

<h3>51.34°</h3>

Hope this helps you

5 0
3 years ago
Read 2 more answers
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