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
Alekssandra [29.7K]
2 years ago
14

What does it mean to evaluate an expression in math?

Mathematics
2 answers:
Ymorist [56]2 years ago
7 0
<span>It mainly means 'simplifying an expression down to a single numerical value', I believe.</span>
zzz [600]2 years ago
7 0

Step-by-step explanation: To evaluate an expression means simplifying it down to a number and usually you will be given variables to substitute in and evaluate.

For example, let's evaluate the expression 3y + 7 when y = 2.

We simply multiply 3 x 2 and add 7 or 3(2) + 7.

3 x 2 is 6 so we have 6 + 7 which is 13.

You might be interested in
Write algebraic expressions
aniked [119]

Answer:

Shea:   1.5x

James:  9.5x + 4.5y

Patricia:    \dfrac13a

Linda:   w - 9

Nicole:   r - 3

Step-by-step explanation:

Shea:   1.5x

James:  9.5x + 4.5y

Patricia:    \dfrac13a

Linda:   w - 9

Nicole:   r - 3

7 0
2 years ago
The endpoints of AB are A(2, 3) and B(8, 1). The perpendicular bisector of AB is CD, and point C lies on AB. The length of CD is
marysya [2.9K]
Comment
If C lies on AB Then it must be the midpoint of AB because CD is the Perpendicular Bisector of AB

Midpoint
A(2,3) B(8,1)
Midpoint formula = (x1 + x2)/2 + (y1 + y2)/2
Midpoint = (2 + 8)/2 + (3 + 1) / 2 
Midpoint = 10/2 + 4/2
Midpoint = (5,2) <<<<< answer


Slope AB
slope = (y2 - y1)/(x2 - x1)
slope = (3 - 1) / (2 - 8)
slope = 2/-6 = -1/3

Slope CD
CD_slope * AB_slope = - 1
CD_slope * -1/3 = -1 multiply both sides by - 3
CD_slope * 1 = - 1 * -3
CD_slope = 3   <<<<< Slope CD Answer

Equation CD
Given the midpoint of AB which is C( and the slope of CD
y = 3x + b
2 = 3*5 + b
b = - 13
Equation y = 3x - 13

Using Distance to get D
d^2 = (x1 - x2)^2 + (y2 - y1)'^2 
d^2 = (x2 - 5)^2 + (y2 - 2)^2
y2 = 3*x2 - 13
10 = x2^2 - 10x2 + 25 + (3x2 - 13 - 2)^2
10 = x2^2 - 10x2 + 25 + (3x2 - 15)^2
10 = x1^2 - 10x2 + 25 + 9x^2 - 90x2 + 225
10 = 10x2^2 - 100x2 +250
0 = 10x2^2 - 100x2 + 240 Divide through by 10
0 = x2^2 - 10x^2 + 24
0 = (x2 - 6)(x2 - 4)
 
x2 = 6 or
x2 = 4

Using y2 = 3x - 13
for x2  = 4
then y2 = 3(4) - 13
y2 = - 1

for x2 = 6
y2 = 3*6 - 13
y2 = 5

Possible Answers  for D
D = (4,-1)
D = (6,5)

I've included a graph to show a graphical solution. 

Please note in a week's time, if no one else answers, you can award a Brainly. This question took over an hour. If someone else answers, please choose one of us.

7 0
3 years ago
What song has a slower tempo??<br><br>A)Death bed<br><br>B)Godzilla
disa [49]
Death bed has slower tempo
7 0
2 years ago
Mr. Jensen makes salt dough using 1 cup of salt for every 3 cups of dough. Which graph represents the amount of salt in his doug
klio [65]

Answer:

The third graph

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
In 1989 Dutch ice skater dries van wijhe skated 200km at an average speed of 35.27 km/h. How long was he skating?
Lelu [443]
200/35.27=<span>5.6022409 hours total 
Hope this helps!
</span>
7 0
3 years ago
Other questions:
  • A team of astronauts is preparing a mission to the moon. The pull of gravity on the moon is different than on Earth. On the moon
    13·1 answer
  • On what interval is the functioning decreasing m(x)=4x^3-5x^2-7x?
    13·1 answer
  • Y=<br> (0.<br> (1,<br> (2,<br> (3.<br> (4,<br> (5,
    10·1 answer
  • Solve the system of equations using the elimination method 2x + 9y = -40
    14·1 answer
  • The last one is $30 which one ?
    10·2 answers
  • ILL GIVE BRAINLIEST PLEASE HELP WITH THESE ALGEBRA QUESTIONS show work pls
    13·1 answer
  • I need answer ASAP <br> No links please
    13·1 answer
  • The graphs below have the same shape. What is the equation of the blue<br> graph?
    9·1 answer
  • If you draw a right triangle inside a sphere, which statement about the legs of the right triangle is TRUE?
    5·2 answers
  • Can you please help me list the forms As_,_ and limits
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!