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
devlian [24]
3 years ago
14

To find the value of an expression is called

Mathematics
1 answer:
Ad libitum [116K]3 years ago
4 0
We have learned that, in in an algebraic expression<span>, letters can stand for numbers. When we substitute a specific </span>value<span> for each variable, and then perform the operations, it's </span>called<span> evaluating the </span>expression<span>. Let's evaluate the </span>expression<span> 3y + 2y when 5 = y.</span>
You might be interested in
Find two positive integers such that the sum of the first number and four times the second number is 1000, and the product of th
vladimir2022 [97]

Answer:

The two numbers are:

x = 500

y = 125

Step-by-step explanation:

We want to find two numbers x and y, such that:

x + 4*y = 1000

f(x, y) = x*y is maximum.

From the first equation, we can isolate one of the variables to get

x = 1000 - 4y

now we can replace it in f(x, y):

x*y = (1000 - 4*y)*y  = 1000*y - 4*y^2

So now we want to maximize the function:

f(y) =- 4*y^2 + 1000*y

where y must be an integer.

Notice that this is a quadratic equation with a negative leading coefficient (so the arms of the graph will open downwards), thus, the maximum will be at the vertex.

Remember that for a general quadratic equation:

y = a*x^2 + bx + c

the x-value of the vertex is:

x = -b/(2*a)

so, in the case of:

f(y) =- 4*y^2 + 1000*y

the y-value of the vertex will be:

y = -1000/(2*-4) = 1000/8 = 125

So we found the value of y.

now we can use the equation:

x = 1000 - 4*y

x = 1000 - 4*125 = 1000 - 500 = 500

x = 500

Then the two numbers are:

x =500

y = 125

6 0
2 years ago
NEED HELP FAST PLZZ!!!!!!!
adell [148]
The answer is A. 102.  

Have a great day!
4 0
3 years ago
How these ratios alike? <br> 8:5 16:10 24:15
arlik [135]

Answer:

All the left numbers of the Ratio go by 8's times tables and all the right numbers go by 5's times tables

Step-by-step explanation:

8x1= 8

8x2 =16

8x3 = 24

5x1= 5

5x2= 10

5x3= 15

Let me know if its right.

6 0
3 years ago
NEED HELP ASAP
Gelneren [198K]

Answer:

3/4 mile

Step-by-step explanation:

A = l *w\\\frac{1}{2} = \frac{2}{3} * w\\w = \frac{3}{2} * \frac{1}{2}\\w = 3/4 mile

6 0
3 years ago
Read 2 more answers
Your factory produces lemon-scented widgets. You know that each unit is cheaper, the more you produce. But you also know that co
Sindrei [870]

try using m athway . c o m for math help

8 0
3 years ago
Other questions:
  • What is 800, thousand rounded to the nearest hundreds thousands
    12·1 answer
  • How many words of five letters can be created that start with the letter T, contain 2 other consonats and end with 2 vowels? Not
    7·1 answer
  • Solve the system by the elimination method.
    14·2 answers
  • HELP!!!
    9·1 answer
  • Plz help algebrA give points for it
    8·1 answer
  • PLEASE HELP WITH MATH
    14·2 answers
  • WILL GIVE BRAINLIEST
    15·2 answers
  • convert 15/9 to a decimal round your answer to the nearest hundred.convert 15/9 to a decimal round your answer to the nearest hu
    6·2 answers
  • If solved please explain how you got your answer :/ thanks
    10·1 answer
  • 7. answer please and thank u
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!