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
Nezavi [6.7K]
3 years ago
10

Which of the following are solutions to the equation below? check all that apply. 9x^2-6x+1=7

Mathematics
2 answers:
Evgesh-ka [11]3 years ago
6 0
The answer is C and D

First we must make one side of the equation zero, so we subtract 7 on both sides of the equation, making the equation <span>9x^2 - 6x - 6 = 0 

Then we will use the quadratic formula to find the answers.

</span>using the Quadratic Formula where:
a = 9, b = -6, and c = -6

and the formula is 6 +- \sqrt{6^2 - 4(9)(-6)} / 2(9)
Gnesinka [82]3 years ago
4 0
Lets go ahead and factor this out.

9x²-6x-6 = 0

Using quadratic formula, we will get 6 +/- √(-6)²-4(9)(-6) all over 2(9)

Simplified to 6+/- √36+216 all over 18
6+/- √252 / 18

Simplifying √252, we get 6√7

Then, we can get 6+/- 6√7 / 18

Possible answers are A, C

Hope this helps
You might be interested in
Which graph represents the linear function y=1/5x-2​
gladu [14]

Answer: The second one

Step-by-step explanation: Y-int is -2 and the slope is 1/5 so we know its going up but very slowly

7 0
3 years ago
!!!! I'LL GIVE BRAINLIEST !!!! PLS HELP THIS IS A TEST
kirza4 [7]

Answer:

yes,this is congruent by SAS criteria

8 0
3 years ago
here are 1515 people in an office with 55 different phone lines. If all the lines begin to ring at once, how many groups of 55 p
Mashcka [7]

Answer:

360,360 groups of 5 people.

Step-by-step explanation:

We have been given that there are 15 people in an office with 5 different phone lines. We are asked to find groups of 5 people that can answer these lines, if all the lines begin to ring at once.

We will use fundamental principle of counting to solve our given problem.

There are 15 people to answer 1st line, that will leave us with 14 people to answer 2nd line.

Now, we will have 13 people to answer 3rd line, that will leave us with 12 people to answer 4th line.

There are 11 people to answer 5th call.

So 5 lines can be answered in 15\times 14\times 13\times 12\times 11=360,360 ways.

Therefore, 360,360 groups of 5 people can answer these lines.

6 0
3 years ago
Mrs. Thompson wants to buy centerpieces to use at a party. It will cost $49 to have the centerpieces delivered plus $0.89 per ce
dalvyx [7]

Answer:

49+0.89c

Step-by-step explanation:

This should be the answer good luck :)

8 0
3 years ago
Find the perimeter of a rectangle that is 3 inches long and 4 inches wide.
katen-ka-za [31]

Answer:

14 inches

Step-by-step explanation:

Perimeter of a rectangle

= 2(l + w)

Given length L = 3 inches and

Width w = 4 inches

Perimeter = 2(3 + 4)

Simplify the bracket

2 x 7

14 inches

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the answer to this question
    13·1 answer
  • How do you find h(x)?
    6·1 answer
  • Which of the following is the graph of Y -
    5·1 answer
  • What's the pattern?<br> 1,2,4,8,16.....
    15·1 answer
  • Let g(t) be the solution of the initial value problem 5tdydt+y=0,t&gt;0, with g(1)=1. find g(t).
    12·1 answer
  • Which expression is equivalent to (x2 +9x – 1)(-4x + 3)?
    15·1 answer
  • What is the probability that john and alex are born on tuesday?
    9·2 answers
  • Given the functions f(x) = 7x + 13 and g(x) = x2 + 2, which of the following functions represents f[g(x)] correctly?
    7·1 answer
  • PLEASEE HELPP BRAINLY,BRAINLIEST POINTS!!
    10·1 answer
  • Bummer! Kai has to pay sales tax! The sales tax rate is 5.75%. How much is the backpack?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!