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
yulyashka [42]
4 years ago
9

Sam was asked to evaluate the expression 5x+3x+20 for X = 100. Sam's work shown below. Sam's work: 5x+3x+20 = 100 8x+20 = 100 8x

= 80 X = 10 What mistakes did Sam make? Help Sam to answer the question correctly.
Mathematics
2 answers:
choli [55]4 years ago
7 0
<span>Sam had to substitute 100 instead of X

</span><span>5x+3x+20 = 
8x + 20 =
8*100 + 20 = 
800 + 20 = 
820   </span>← answer
nevsk [136]4 years ago
3 0

Answer:

The value of given expression for x=100 is 820.

He should substitute the value of x in the given expression instead of equating it to 100.

Step-by-step explanation:

The given expression is

5x+3x+20

Sam want to evaluate the expression 5x+3x+20 for x = 100.

Substitute x=100 in the given expression.

5(100)+3(100)+20

500+300+20

820

The value of given expression for x=100 is 820.

Sam make his mistake in first step. He equate the given expression to 100.

He should substitute the value of x in the given expression instead of equating it to 100.

You might be interested in
Twice a increased by the cube of a equals b
Kobotan [32]

Twice a increased by the cube of a equals b :

2a + a^3 = b


5 0
3 years ago
Graph the solution set of this inequality 3x-2y &lt;_ 12
nadezda [96]

The graph of the solution set for the inequality can be seen below.

<h3>How to graph the solution set?</h3>

Here we have the inequality:

3x - 2y < -12

If we isolate y, we get:

3x + 12 < 2y

(3x + 12)/2 < y

(3/2)x + 6 < y

Now, we just need to graph the line y = (3/2)x + 6 with a dashed line (because the points on the line are not solutions).

And then we need to shade the region above the line.

The graph of the solution set can be seen below.

If you want to learn more about inequalities:

brainly.com/question/18881247

#SPJ1

8 0
2 years ago
let a,b,c,d be four integers (not necessarily distinct) in the set {1,2,3,4,5}. the no. of polynomials x^4+ax^3+bx^2+cx+d which
Eddi Din [679]
By either long or synthetic division, it's easy to show that

\dfrac{x^4+ax^3+bx^2+cx+d}{x+1}=x^3+(a-1)x^2+(-a+b+1)x+(a-b+c-1)-\dfrac{a-b+c-d-1}{x+1}

The quartic will be exactly divisible by x+1 when the numerator of the remainder term vanishes, or for those values of a,b,c,d such that

a-b+c-d-1=0

I'm not sure how to count the number of solutions (software tells me it should be 80), but hopefully this is a helpful push in the right direction.
8 0
3 years ago
If 3^2x+1=3^x+5 what is the value of x
Diano4ka-milaya [45]
The answer to this question would be 4
4 0
2 years ago
Zero of the functions f(x)= x^2 + 4x+3 and why ?
slava [35]
There are two zeros: -3 and -1. This is because when you factor f(x)<span>= x^2 + 4x + 3, it becomes f(x) = (x + 3)(x + 1). In order to find the zeros, set f(x) to 0, and then solve for x for both (x + 3) and (x + 1). You can check your answer by substituting either -3 or -1 for x in the equation 0 = </span>x^2 + 4x + 3.
6 0
3 years ago
Other questions:
  • Find the volume of each three dimensional figure (3 problems please help)
    5·1 answer
  • Simplify the expression: x^2+3x-28/x^2-7x+12. <br> Show your work.
    10·1 answer
  • Helppp what is the correct answer and why?
    13·1 answer
  • tom left at 1:00 p.m to walk to the pool . it took him 45 to walk there what time did get to the pool ?
    14·1 answer
  • The attic floor, ABCD in the model, is a square. The beams that support the roof are the edges of a block (rectangular prism) EF
    7·1 answer
  • Evaluate 1/2 t + 3/8 when t=1/4
    8·2 answers
  • What is the diameter of a circular swimming pool with a radius of 9 feet? enter only the number
    13·2 answers
  • F(3)= 5x^2 - 4x + 9<br> evaluate this quadratic function
    7·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Clim_%7Bx%20%5Cto%200%20%7D%20%5Cfrac%7Bx-sin%282x%29%7D%7Bx%2Bsin%283x%29%7D" id="TexFormul
    9·1 answer
  • In the diagram, what is mAngleVSR?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!