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katrin2010 [14]
2 years ago
9

Racheal has scored 81,70,95,73,and 72 on her previous five tests. What score does she need on her next test so her average mean

is 81?
Mathematics
1 answer:
kiruha [24]2 years ago
3 0
She needs to score another 95 on her next test!
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Priyanka and Ethan were asked to find an explicit formula for the sequence -3,-14,-25,-36,...
irga5000 [103]

Answer:

a_{n} = 8 - 11n

Step-by-step explanation:

These are the terms of an arithmetic sequence with n th term

a_{n} = a + (n - 1)d

where a is the first term and d the common difference

here a = - 3 and

d = - 14 - (- 3) = - 14 + 3 = -11, thus

a_{n} = - 3 - 11(n - 1)

                        = - 3 - 11n + 11

                        = 8 - 11n

3 0
3 years ago
F the value of x decreases by 6, how does the value of m(x + 9) change?
Yuki888 [10]

start with y= m(x+9)

Use the distributive property:

y= mx+9m

Now you want x to decrease by 6:

so y ' = m(x-6) + 9m

Use distributive property again:

y'= mx - 6m + 9m

y' = (mx+9m) - 6m

y' = y - 6m

So the value of y decreases by 6m.

3 0
3 years ago
How do you simplify the expression q(x) = (x² + x - 1) × (x² - x - 1)?
rewona [7]

Answer:

q=−3x3+4x2−x

hope this helped :)

Step-by-step explanation:

8 0
3 years ago
Sarah has 25 candies. Sarah gave 2/5 of the candies to her sister. Of the amount left she gave 2/3 to her friend. How many candi
satela [25.4K]

Answer:

5 candies

Step-by-step explanation:

Total of candy Sarah has = 25candies

If Sarah gave 2/5 of the candies to her sister, the total amount she gave her sister will be 2/5 of 25

2/5 of 25 = 10

The remaining candy left will be 25-10 which is 15.

If she gave 2/3 of amount left to her friend, the amount she gave her friend will be 2/3×15 = 10candies.

The amount of candy Sarah have left will be 15- 10 which is 5candies.

3 0
3 years ago
Randell earns $8 per hour at his job. if he works more than 40 hours, he earns 1 1/2 times his normal hourly rate. if Randall wo
satela [25.4K]

Answer:

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3 0
3 years ago
Read 2 more answers
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