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
tino4ka555 [31]
3 years ago
7

Which of the equations are true identities?

Mathematics
1 answer:
Wittaler [7]3 years ago
5 0

Answer:

A

Step-by-step explanation:

I assume that you mean -4 instead of +4 in the first one

(5b-2)^2-4=25b^2-20b+4-4=25b^2-20b

then A is the correct answer

You might be interested in
A function is defined by f(x)=6x+1.5. What is f(2.5)
Nataly_w [17]

f(2.5) means x is equal to 2.5.

Replace x in the equation with 2.5 and solve:

6(2.5) + 1.5 = 15 + 1.5 = 16.5

f(2.5) = 16.5

8 0
4 years ago
Read 2 more answers
A repair company’s charge for repairing a certain type of copy machine fits the model y = 47.38 + 0.617x where y is the number o
Tems11 [23]

Answer: 36.66min

Step-by-step explanation:

y = 47.38 + 0.617x

where y is the number of dollars

x is the number of minutes on the job

Given a value of y = $70, then

We substitute y = $70 in the equation.

70 = 47.38 + 0.617x

22.62 = 0.617x

X = 22.62/0.617 = 36.66min

6 0
3 years ago
Please please help me!!
makvit [3.9K]

Answer:

f(x)= - l x - (-4) l + 0

Step-by-step explanation:

6 0
4 years ago
Enrollment at a school last year was 1220 this year the student population decreased by 10% how many total students are attendin
Umnica [9.8K]
I think 37%......................................................
8 0
3 years ago
If the simple interest on 7000​$ for 8 years is ​3920$​, then what is the interest​ rate?
Lisa [10]

Answer:

7000(r)(8)=3920

Step-by-step explanation:

just put that down a calculator I to lazy to solve it

3 0
3 years ago
Read 2 more answers
Other questions:
  • write an equation in standard form for a line that is (a) parallel (b) to the line with an equation of y=3x-5 that passes throug
    12·1 answer
  • Scott wants to buy fencing to place around a circular rock garden. The diameter of the circle is 16 feet. Using 3.14 for π, Calc
    10·1 answer
  • Waldo has saved $14.55 in Nichols in quarters he has 21 more quarters and nickels how many quarters does Waldo have
    10·1 answer
  • Please help me please and thank you
    15·1 answer
  • Which graph represents the solution set of this inequality?
    9·1 answer
  • Graph a line that contains the point (3,-6) and has slope of -1/2​
    8·1 answer
  • Unit rate for 5/2 and 1/4
    13·1 answer
  • Help plz I’m stuck on this
    15·1 answer
  • 30 points!!!!!!!!!!!!!!!!!!!
    10·1 answer
  • Please help me! There is a picture.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!