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
tensa zangetsu [6.8K]
3 years ago
15

How do you find the missing number of a perfect square trinomial? 25x^2 - 60x + ___

Mathematics
1 answer:
Harrizon [31]3 years ago
4 0

Answer:

  36

Step-by-step explanation:

Compare what you have to the square ...

  (a +b)^2 = a^2 +2ab +b^2

Your "a" is √(25x^2) = 5x

Your "2ab" is -60x. Since you know "a", you can find "b".

  2ab = -60x

  2(5x)b = -60x . . . . . . . substitute for "a"

  b = -60x/(10x) = -6

Then the missing term is b^2 = (-6)^2 = 36.

Your trinomial is ...

  25x^2 -60x +<u>36</u>

You might be interested in
If angle YWZ = 17, what is angle WXY?
marusya05 [52]
We know that

step 1
if ∡YWZ=17°
then
∡XWZ=17°*2-----> 34°----> because triangle XWY and triangle YWZ are congruents

step 2
∡WXY=∡WZY-------> because triangle XWY and triangle YWZ are congruents
we know that 
<span>the sum of the internal angles of a triangle is 180 degrees
</span>so
180°=∡XWZ+2*∡WXY---------> ∡WXY=[180-∡XWZ]/2
∡WXY=[180-34°]/2-------> ∡WXY=73°

the answer is
∡WXY=73°

5 0
3 years ago
Whats 2x + y = 10 5x - y = 18 in elimination method
Naya [18.7K]
2x + y = 10
5x - y = 18

7x = 28

x = 4

2(4) + y = 10

8 + y = 10

y = 2

(4,2)
8 0
4 years ago
57 is 13.5% of what number?
kondaur [170]
Let, the number = x
It would be: x * 0.135 = 57
x = 57 / 0.135
x = 422.23

Hope this helps!
6 0
3 years ago
Write an equation that shows the equivalency between meters and gigameters.
Anastasy [175]
Below is an equation that shows the equivalency between meters andGigameters:


10 ^{9} m = 1 Gm


The  conversion factor should be used to convert from meters toGigameters should be:

\frac{1 Gm}{10 ^{9} m }
4 0
4 years ago
A bill for the repair of a laptop was $249. The cost of the parts was $84, and the labor charge was $55 per hour. How many hours
jek_recluse [69]
3 hours.
Explanation
249 total - 84 already paid (for parts) is
165.
165
divided by
55 dollars an hour
is
3 hours worked on repairing.
6 0
3 years ago
Other questions:
  • Rex mixed x liters of fruit syrup with y liters of water to make a fruit punch. Three times the number of liters of water he mix
    13·2 answers
  • BEST ANSWER GETS TO BE BRAINLYEST!!!!!
    13·1 answer
  • Find the missing variable for the following direct variation k= -2; (x, -8)
    10·1 answer
  • A dataset from a government survey contains variables for 87 adults age from 18 to 85. The variables include iron level ( µ g/d
    7·1 answer
  • Solve the absolute value inequality.
    11·1 answer
  • Zoologists estimate that a randomly selected baby giraffe has a 32% chance of surviving to adulthood. Assume this estimate is co
    7·1 answer
  • Factor completely: 9p^2 - 9
    15·2 answers
  • Use the given information to find the minimum sample size required to estimate an unknown population mean mu. How many students
    11·1 answer
  • You deposit $2700 in an account that earns simple interest. After 12 months, the account earns $64.80 in interest, what is the a
    10·1 answer
  • (-1,1) (0,-1) (5,-11) (10,-21) what is the domain of the set of ordered pairs above?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!