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
Ket [755]
3 years ago
7

2a² - a - 13 =2 I want to see the steps how its done​

Mathematics
1 answer:
sammy [17]3 years ago
8 0

Answer:

Step-by-step explanation:

2a^-a-13=2

Subtract 2 from both sides :

2a^2-a-13=2=2-2

2a^2-a-15=0

Factor left side of the equation :

(2a+5) (a-3)=0

Set factors equal to 0 :

2a+5=0 or  a-3=0

a=-5/2   or a=3

You might be interested in
Manuel noticed that his cellphone bill reflected a monthly fee of
Tomtit [17]

Answer: (total amount paid - $40) / 0.05

Step-by-step explanation:

Given the following :

Monthly fee = $40

Additional fee = $0.05 per minute on phone

Given the the amount paid for the month is available, number of minutes he was on phone can be determined thus :

Total amount to be paid = monthly fee + additional fee

Additional fee = $0.05 × n

Where n = number of minutes on phone

Hence,

Total amount paid = $40 + $0.05n

If the amount paid is known, the number of minutes on phone can be calculated thus;

(Total amount paid - monthly fee) = $0.05n

n = (Total amount paid - monthly fee) / fee per minute on phone

(total amount paid - $40) / 0.05

3 0
3 years ago
Which value is a solution of the equation 3-2x=-5<br> A= 2<br> B= 4<br> C= -2<br> D= 1/5
Ad libitum [116K]
3 - 2x = -5
-2x = -8
x = 4
6 0
3 years ago
Read 2 more answers
9/4 divided by 3/8= 9/4 x 8/3
erma4kov [3.2K]

Answer:

9/4:3/8=9/4×8/3=72/12=24/4=6/1=6

7 0
3 years ago
Read 2 more answers
The sum of two consecutive natural numbers is 525.<br> Find the numbers.
Luda [366]

Answer:

262 and 263 are consecutive natural numbers whose sum is 525.

Step-by-step explanation:

Natural number are a subset of real numbers consisting in positive integers (i.e. 1, 2, 3, 525) and two natural numbers are consecutive when distance between each other is equal to 1. (|x-y| = 1, \forall\,x,y \in \mathbb{N}) We can interpret the statement mathematically by means of the following expression:

x + y = 525

x = n

y = n+1

Where x, y, n \in \mathbb{N}.

This system is reduced to a single equation and solved afterwards:

n +(n+1) = 525

2\cdot n + 1 = 525

2\cdot n = 524

n = 262

Now we evaluate x and y to obtain the natural numbers:

x = 262

y = 263

262 and 263 are consecutive natural numbers whose sum is 525.

3 0
3 years ago
What are the steps to converting 720 seconds into hours?
Nataly [62]
This conversion<span> of </span>720 seconds<span> to </span>hours<span> has been calculated by multiplying </span>720 seconds<span> by 0.0002 and the result is 0.2 </span>hours<span>.</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • You sell bobble heads online. You need to pay $120 to get the web space and website name. You pay $12 for each bobble head. You
    10·1 answer
  • How do you Factor in algebra 2?<br><br> for example: <br> r^2-r-20<br> and<br> x^2+8x+12
    7·1 answer
  • 9u²v and which term are like terms?
    13·2 answers
  • HELP ASAP!!!!!
    10·2 answers
  • Pls help me the question is on the picture
    9·2 answers
  • Determine the approximate measure of angle Y.​
    13·1 answer
  • Which two statements are true about triangle b?
    11·1 answer
  • Find sin A.12/13<br> B.1<br> C.13/12<br> D.13/5
    15·1 answer
  • Am I correct if not what is the correct answer
    11·1 answer
  • Emma's dad and her Uncle Pete are trying to recreate their dad's famous dipping sauce for an upcoming family reunion. They remem
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!