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
Makovka662 [10]
3 years ago
13

Solve x^2 - 10x = -21.

Mathematics
1 answer:
scoundrel [369]3 years ago
7 0

Answer:

A

Step-by-step explanation:

1.move -21 over to the other side to get x^2 - 10x +21

2. factor. you want to find something that multiples to 21 (the c value) but adds up to -10 (the b value.) the numbers are -7 and -3. so you would factor it out like this: (x-7)(x-3)

3. set each factor to 0 to find the x values

x-7=0 and x-3=0. once you move the numbers over to isolate the x term, you should get x=7 and x=3.

You might be interested in
Help with math pls pls pls
Andrews [41]

Answer:

  No; the lines have unequal slopes.

Step-by-step explanation:

You can see the appropriate answer by plotting the points on a graph. In the attached, the line through the blue points will have a different slope from the line through the red points.

4 0
4 years ago
Find the missing length of the triangle.<br> 10 in.<br> 16<br> 26 in.
Yanka [14]

Answer:

24

Step-by-step explanation:

26x26=676

10x10=100

676/100=576

The square root of 576 is 24.

8 0
3 years ago
What is the total surface area of the rectangular pyramid whose net is shown?
Lunna [17]

Answer:

95 in.²

Step-by-step explanation:

Total surface area of the rectangular pyramid = 4(area of triangle) + area of rectangle

Area of triangle = ½*base*height

base = 5 in.

height = 7 in.

Area of triangle = ½*5*7 = 17.5 in.²

Area of rectangle = Length*width = 5*5 = 25 in.²

Plug in the values

Total surface area of the rectangular pyramid = 4(17.5) + 25

= 95 in.²

7 0
3 years ago
In the triangle shown below, what is the measure, in degrees, of x, rounded to the nearest whole number?
irga5000 [103]

Answer:

4.5 es el resultado correcto

3 0
3 years ago
How do I do this explain
xeze [42]
So you would take 3x1+2 that gives you 5 and you would keep the same denominator and so that would give you 5/3 then do the same to the other side which would give you 5/4 then you would times it and that would give you 2 1/12
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is the graph of a linear function?
    12·2 answers
  • Electrons and protons are particles in an atom with equal but opposite charges. Electrons have a negative charge and protons hav
    7·1 answer
  • Alfredo is employed on an assembly line. He receives 35 cents for each part that he works on. If he works on more than 150 parts
    11·1 answer
  • Carrie has $500 in her bank account. She plans to add $245 a week to her account. Jose has $710 in his bank account. He plans to
    5·1 answer
  • The force on the last car of a train with a mass of 4.5 4.5 kg is 8.0 8.0 N . What is the train's acceleration in /2 m/s 2 ? Ent
    12·1 answer
  • Hi, i really need help!<br> Look at the images below:<br> (there is 2 images per question)
    11·1 answer
  • A man walks around a field once.
    7·1 answer
  • 10800 rupees for 3 years at 12 1\2% per annum compounded annually
    13·1 answer
  • UNIT TEST HELP PLS
    13·1 answer
  • Please help me and tysm!​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!