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
mestny [16]
3 years ago
13

Simplifying algebraic expressions 7d+d use d=9

Mathematics
1 answer:
Lostsunrise [7]3 years ago
5 0
Hey there Titachely1p09ewg,

Answer:

7d + d = 7 (9) + 9
           = 63 + 9
           = 72

Hope this helps :D

<em>~Natasha♥</em>
You might be interested in
Anyone knows how to do questions 7 and 8? 15 pts!!
Oksi-84 [34.3K]
7) Certainly there is a typo in the statement, just see that the expression of item (ii) is different from that of item (i). Probably the correct expression is: 2x^2-4x+5. With this consideration, we can continue.

(i) Let E the expression that we are analyzing:

E=2x^2-4x+5\\\\ E=2x^2-4x+2-2+5\\\\ E=2(x^2-2x+1)-2+5\\\\ E=2(x-1)^2+3

Since (x-1)² is a perfect square, it is a positive number. So, E is a result of a sum of two positive numbers, 2(x-1)² and 3. Hence, E is a positive number, too.

(ii) Manipulating the expression:

2x^2+5=4x\\\\ 2x^2-4x+5=0

So, it's the case when E=0. However, E is always a positive number. Then, there is no real number x that satisfies the expression.

8) Let E the expression that we want to calculate:

E=(2+1)(2^2+1)(2^4+1)\cdot ...\cdot(2^{32}+1)+1\\\\ E-1=(2+1)(2^2+1)(2^4+1)\cdot ...\cdot(2^{32}+1)

Multiplying by (2-1) in the both sides:

(2-1)(E-1)=(2-1)(2+1)(2^2+1)(2^4+1)\cdot ...\cdot(2^{32}+1)\\\\ (E-1)=\underbrace{(2-1)(2+1)}_{2^2-1}(2^2+1)(2^4+1)\cdot ...\cdot(2^{32}+1)\\\\ (E-1)=\underbrace{(2^2-1)(2^2+1)}_{2^4-1}(2^4+1)\cdot ...\cdot(2^{32}+1)\\\\ ... Repeating the process, we obtain: ...\\\\ E-1=(2^{32}-1)(2^{32}+1)\\\\ E-1=2^{64}-1\\\\ \boxed{E=2^{64}}
3 0
3 years ago
Read 2 more answers
Evaluate 8x-6 when x=7
V125BC [204]

Answer:

50

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
PLSS HELP!! VERY EASY.
gogolik [260]

Answer:

35 ways

Step-by-step explanation:

Alex has 9 friends and wants to invite 5 friends. Since Alex requires two of his friends who are twins to come together to his birthday party, since the two of them form a group, the number of ways we can select the two of them to form a group of two is ²C₂ = 1 way.

Since we have removed two out of the nine friends, we are left with 7 friends. Also, two friends are already selected, so we are left with space for 3 friends. So, the number of ways we can select a group of 3 friends out of 7 is ⁷C₃ = 7 × 6 × 5/3! = 35 ways.

So, the total number ways we can select 5 friend out of 9 to  party come to the birthday include two friends is  ²C₂ × ⁷C₃ = 1 × 35 = 35 ways

3 0
3 years ago
after taking math online . what would you say are some pross (good) and cons (bad) about taking classes . online? what would mak
Elden [556K]

Answer:

Cons: Could be harder, Difficult to solve, hard to see problems online, Things to help: Post assignments in portions Pros: hand wont hurt if writing, Wont loose paper if it’s on paper

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Math Lab Review Work
umka2103 [35]

Answer:

I think it C because I know that Nalia isn't correct so it's not D or B.

8 0
3 years ago
Other questions:
  • A study was done to determine if students learn better in an online basic statistics class versus a traditional face-to-face (f2
    8·1 answer
  • The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean o
    13·1 answer
  • Will someone solve for X step by step please?
    8·2 answers
  • SV is an angle bisector of ∠RST. If m∠RSV = (2x + 8)° and m∠RST = (6x − 26)°, find x.
    7·1 answer
  • Help what is greater?45.10 or 45.01???
    5·2 answers
  • 2. I pay $4.00 for my train fare everyday. This week, my train
    12·2 answers
  • Does -2(11-12x)=-4(1-6x) does it have one solution or no solution or many solutions
    6·1 answer
  • Someone please help.​
    11·1 answer
  • Help me with this scorpy TY SO MUCH &lt;333
    11·1 answer
  • A polynomial is factored using algebra tiles. An algebra tile configuration. 0 tiles are in the Factor 1 spot and 0 tiles are in
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!