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
Butoxors [25]
3 years ago
12

The solution to 2x2 – 11 = 87 is .

Mathematics
2 answers:
Klio2033 [76]3 years ago
8 0

Answer:

x = 7, -7

Step-by-step explanation:

2x² - 11 = 87

2x² = 98

x² = 49

x = +/-7

ohaa [14]3 years ago
5 0

Step-by-step explanation:

<u>Step 1:  Subtract 87 from both sides</u>

2x^2 - 11 - 87 = 87 - 87

2x^2 - 11 - 87 = 0

<u>Step 2:  Factor</u>

2x^2 - 11 - 87 = 0

2(x + 7)(x - 7) = 0

x + 7 = 0 and x - 7 = 0

x = -7 and x = 7

Answer:  x = -7, 7

You might be interested in
Find the LCM of 13 and 39
Aneli [31]

13  is a factor of  39.
So  39  is a multiple of both numbers.
That means it's their least common multiple.

3 0
3 years ago
Read 2 more answers
If you were to randomly survey 50 people from the phone books of 20 randomly chosen cities, would this be a random sample? Why o
kotegsom [21]

Answer:

no.

Step-by-step explanation:

The survey has too small of a group to be random.

3 0
4 years ago
Read 2 more answers
What is the reciprocal of (22z)/(11x)?
KiRa [710]

Hello!! The answer is 11x/22z

Your Welcome

5 0
4 years ago
Read 2 more answers
Name the angle that is supplementary to
tatuchka [14]

Answer:

i

Step-by-step explanation:

8 0
3 years ago
Step by step helpp.!!
krok68 [10]

Answer:

  1. 0.009 or nine thousandth s
  2. 0.01 or one hundredths
  3. 0.8 or eight tenths

Step-by-step explanation:

  • first you look for the place example the first question 46.339 it's place is 9 as u start from right is not the way you start from the left side left u start with ones but right you start with tenths so 3 is tenths the other 3 is is hundredths thus making 9 thousandths.Making the values 0.009 or nine thousandths.
  • Then next is 142,694.11 is rather much simple than the other one so it goes like this place of the first 1is tenths the other 1is hundredths now about the value the first number on the left make it be a zero so as to get the value much easier so this one would be 0.01 because the second 1was hundredths
  • The last one 5,607.8 place value is tenths because as I started by teaching u that the first right no. is tenths . so the value would be 0.8 or eight tenths, thank you for ask, ask and ask because well are glad to answer have a great life.
4 0
4 years ago
Other questions:
  • I need help with circumference
    5·1 answer
  • Investors buy a studio apartment for 240,000 dollars. Of this amount, they have a down payment of 24.00 dollars. their down paym
    11·2 answers
  • Find the volume of the prism.
    5·1 answer
  • Write an equation in slope-intercept form of the line with the given slope m and y-intercept b.
    10·1 answer
  • Is -15.5 a rational number ​
    15·2 answers
  • Is 5/6 and 9/10 equivalent?
    13·2 answers
  • Express this number in scientific notation. 0.00082350
    7·1 answer
  • Question 2 Read the question and type your response in the box provided. You What is the decimal value of x in the equation 7x -
    5·1 answer
  • Checking number 2( Solving inequalities)
    6·1 answer
  • Find a better estimate of √2.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!