1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
11111nata11111 [884]
3 years ago
11

(-2-4y)(-8) how do I solve ??

Mathematics
2 answers:
lbvjy [14]3 years ago
6 0
(-2 - 4y)*(-8)

(-8)(-2 - 4y)

(-8)*(-2) -8*(-4y)            Note: - * - =  +

16 + 32y

Hope this helped.
klasskru [66]3 years ago
3 0
(-2-4y)(-8)
Use distributive property:
(-2*-8)+(-4y-8)
(remember that when 2 negative numbers are multiplied together it becomes positive.

16+32y

Hope this helps :)
You might be interested in
Work out the formula of the nth term in the following quadratic sequence:<br> 19, 15, 9, 1...
Butoxors [25]

In a quadratic sequence we'll get a linear first difference and a constant second difference.  Let's verify that.

n          1   2   3   4

f(n)       19  15  9   1

1st diff   -4  -6  -8

2nd diff     2   2

We see that we got a constant second difference.  We could just extend that and work back up to get more values.

n          1   2   3   4       5    6      7

f(n)       19  15  9   1      -9   -21   -35

1st diff   -4  -6  -8   -10  -12   -14

2nd diff     2   2    2     2    2

That's just an aside; we're after the general formula.  We have

f(1)=19, f(2)=15, f(3)=9

In general we can assume

f(n) = an²  + bn + c

We get three equations in three unknowns,

19 = a(1²)+b(1)+c = a+b+c

15 = a(2²) + b(2) + c = 4a + 2b + c

9 = a(3²) + b(3) + c =  9a + 3b + c

That's a 3x3 linear system; it's easy to solve directly.  Subtracting pairs,

4 = -3a - b

6 = -5a - b

Subtracting those,

-2 = 2a

a = -1

b = -3a -4 = -1

c = 19-a-b = 21

Answer: f(n) = -n² - n + 21

Check:

f(1) = -1 - 1 + 21 = 19, good

f(2) = -4 - 2 + 21 = 15, good

f(3) = -9 - 3 + 21 = 9, good

f(4) = -16 - 4 + 21 = 1, good

Let's check our extended table, how about

f(7)= -49 - 7 + 21 = -35, good

6 0
3 years ago
A correction of "six less than twice the value of x" is
nordsb [41]

Answer:

2x-6

I don't know what you mean by correction, but that's in expression form.

8 0
3 years ago
Which expression is equivalent to 1/27
jolli1 [7]
1/9 or 1/3 hope this helps!
5 0
3 years ago
Read 2 more answers
The aquarium charges an entrance fee of $5 per child and $12 per adult. On one day, 100 people visited the aquarium. They collec
igor_vitrenko [27]

Answer:

We set up 2 equations

A) C + A = 100

B) 5C + 12A = 780

We multiply A by -5

A) -5C -5A = -500   then we add B

B) 5C + 12A = 780

7A = 280

Number of Adults = 40

5C = 780 - 40*12

5C = 780 -480

5C = 300

Number of Children = 60

Step-by-step explanation:

6 0
2 years ago
Rachel's free throw average for basketball is 60%. She wants to predict how many times in the next 50 tries she will make a free
Gnoma [55]
If she shot her average she would make 30 out of 50 shots (AKA 60%) 
She could use the index cards to record each shot, recording 5 results on each one of the 10 cards


I understand this answer is really late for you but I hope you can still use it or someone else can use it if they have the same assignment

5 0
3 years ago
Read 2 more answers
Other questions:
  • If the fourth multiple of 3 is subtracted from the third multiple of 4 what is the difference
    14·2 answers
  • Tyler is overdrawn at the bank by $180 He gets $70 for his birthday and deposits it what is his account balance now
    10·2 answers
  • Is -83/7 bigger than 11 and 5/10
    15·2 answers
  • 3(2z−4)=−6(2−z). help plss
    8·1 answer
  • Sandra wants to buy a new mp3 player that is on sale for $95 she has saved $73 how much more money does she need
    14·2 answers
  • Whats 12.401-9.9 can someone one please help me​
    9·2 answers
  • Is 90.31 greater than 90.302
    5·1 answer
  • I need help on this...
    15·1 answer
  • Please help i will give brainest to correct answer
    15·2 answers
  • Sophia is signing up for a gym membership with a one-time fee to join and then a monthly fee to remain a member. The one-time fe
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!