MATHEMATICS HIGH SCHOOL

Evaluate f(x) = x2 + 3x − 4 when x = 4:

Answers

Answer 1
Answer:

Answer:

f(x)=24

Step-by-step explanation:

Replace x in the function with the value 4.

f(4)= (4)^2 + 3(4) - 4  

16 + 12 -4

28 - 4

F(x)= 24

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A store buys an item for $50 and marks it up 100%. What is the price?

Answers

Answer

     = $100


Explanation

Profit =  selling price  -  buying price

percentage profit = profit/buying price × 100%

100% = profit /$50

Profit = 100% × $50

           = 100/100 × $50

             = 1 × $50

              = $50

Selling price = buying price + profit

                     = $50 + $50

                     = $100

$100 

100% would be doubling it.

Take a look at the figure. What are the coordinates of the point labeled A in the graph shown?A. (2, 2)
B. (–2, 4)
C. (2, –2)
D. (–2, 2)

Answers

The coordinates of the point labeled A in the graph shown is (2,-2). The 2 is in the x axis while -2 is in the y axis of the graph while point B is in coordinates (-2,-2) and  point C is in coordinates (-2,4).

What is more precise 4.33g;4337mg

Answers

4337 mg is much more precise as compared to 4.33 grams (which is obviously rounded). 

Hope this helps :)

What is the equation of a line that has a slope of 2 and passes through point (-1, 7)?

Answers

Answer:

2x+9

Step-by-step explanation:

What is the solution to the equation?7(5 + 9) = 7 • x + 7 • 9

A.
x = 1

B.
x = 5

C.
x = 7

D.
x = 9

Answers

35 + 63 = 7x + 63
35 = 7x
--- ---
7 7
x = 5

Sharon is decreasing the size of a diagram of a leaf that is 30 centimeters long by 10 centimeters wide, if the reduced diagram is 4 centimeters wide how long will it be?

Answers

Answer:

12 cm


Step-by-step explanation:

This is a proportionality/similarity problem.

10 cm turned to 4 cm. So by how much has it decreased? In other words, 10 multiplied by WHAT is 4?

10*x=4\nx=(4)/(10)\nx=0.4

0.4 is also known as the scale factor from the large diagram to the small diagram.

So how much would 30 cm become? It would be 30 multiplied by the scale factor, which is 0.4.

30*0.4=12

Hence, the length of the reduced diagram would be 12 cm.
x-length\n\nFrom\ proportion:\n\n(30)/(10)=(x)/(4)\n\n10x=120\ \ \ \ \ \ |:10\n\nx=12\n\nIt\ will\ be\ 12\ cm\ long
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