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
alina1380 [7]
2 years ago
12

wanting some extra help with factoring while knowing what method it would be like gcf or grouping etc

Mathematics
2 answers:
Ksju [112]2 years ago
8 0

d) You have a <u>difference of squares</u>:

49y² - 9 = (7y)² - 3²

Recall the identity,

a² - b² = (a - b) (a + b)

So,

49y² - 9 = (7y - 3) (7y + 3)

e) Pull out the common factor 3 from each term:

3x² - 3x - 90 = 3 (x² - x - 30)

Now use the <u>sum-product method</u>. Notice that we can write 30 = 5 • 6, and 5 - 6 = 1, so

3x² - 3x - 90 = 3 (x + 5) (x - 6)

f) Same as in (e), use the <u>sum-product method</u>. Notice that 42 = 7 • 6, and -7 - 6 = -13, so

x² - 13x + 42 = (x - 7) (x - 6)

loris [4]2 years ago
7 0

#1

  • 49y²-9
  • (7y)²-3²
  • (7y-3)(7y+3)

#2

  • 3x²-3x-90
  • 3(x²-x-30)
  • 3(x-6)(x+5)

#3

  • x²-13x+42
  • x²-7x-6x+42
  • (x-7)(x-6)
You might be interested in
Correct Answers only please!
Allushta [10]

Answer:

  C.  20, 40, 4, 56

Step-by-step explanation:

In order for the slugging percentage to be more than 0.500, the number of bases must exceed 200 for 400 At Bats. Clearly, the option with 56 homers will do that, since the homers alone account for 224 bases.

The set of choice C would have a slugging percentage greater than 0.500.

6 0
3 years ago
Which equation models this problem?
Vladimir [108]
C. 5/6b = 140
(*assuming b = total number of cards)
If the piles have an equal number of cards and 5 out of the 6 piles were put in the collection, 5/6 of the cards were put into the collection. The total number of cards put in the collection is 140, so 5/6b=140.
4 0
3 years ago
Read 2 more answers
You go to a local mechanic to get your tires changed. The tires cost $300. There is a 6% sales tax, but you get a 10% discount.
Romashka-Z-Leto [24]

Answer:

a) T(x)=300x+18x=318x

b) D(x)=318x-(0.1)(318)+10x\\=296.2x

c) Yes.

Step-by-step explanation:

We have that:

Tires=$300\\Tax=0.006\\Discount=0.1\\

And we have $10 free of taxes.

Making x= number of tires to buy, then we have that the total cost of tires is:

Total_{Tires}=300x

So, what we pay for taxes is given by:

Taxes=(300x)(0.06)=18x

a) Then, according to the above, we can write down the total cost before the discount as:

T(x)=300x+18x=318x

b) And the total cost after discounts, is then given by:

D(x)=318x-(0.1)(318)+10x\\=296.2x

c) If the discount is added first, then less tax will be paid because the amount on which it is paid is lower. If the discount is added later, then the taxes will have been taxed on a higher amount, so it does matter whether they are added first or later.

6 0
3 years ago
If K is the midpoint of HJ, HK = x+6, and HJ =4x-6, then KJ = ?
barxatty [35]
4x-6= x+6
4x= x + 12
5x= 12
X= 12/5
X= 2.5
6 0
3 years ago
The bills won 57.1% of their 140 games last year. How many did they win
antoniya [11.8K]

Answer:

79.94

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Other questions:
  • A sprinkler that sprays water in a circular area can spray up to a radius of 22 ft.
    15·2 answers
  • 4% of what number is 7
    13·1 answer
  • What ordered pair is a solution to the equation y=-3x-5
    14·1 answer
  • What is 6 2/3 subtract 4 1/2
    7·2 answers
  • A right cylinder with a height of 15 inches has a volume of volume of 8, 640 π cubic inches. What is the diameter of the base of
    13·1 answer
  • Please can you do these asap I will be very thankful
    13·1 answer
  • 1. h-4w when h =17 and w = 2
    10·1 answer
  • PLEASE HELP
    13·2 answers
  • If a1=1. And r=1/5 find a8
    7·1 answer
  • Comparing Guy montage and Harrion Bergeon and eeing how they are different, imilar and the negative reult of their dytopian worl
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!