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3 years ago

If f(x) = 0.8(2 – x), what is the value of f(–2)?

1 answer:

5 0

With functions, you take the number that is in the ( ), so we have f(-2), and take the fomula f(x) = 0.8(2 – x) and everywhere you see an 'x' replace it with the -2 f(–2)=0.8(2 – (-2))

We will have to work with the expression of 0.8(2-(-2) When you want to evaluate these types of expressions, you want to use the Order of Operations: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. First we have to evaluate the parentheses. What is 2-(-2)
its 4.

ok now you got 0.8 (4)

Now we have the remains of 0.8(4). If a number is within the parenthesis, then it means that we have to multiply the number inside with the number that is outside. What is 0.8*4 its 3.2 soooo your answer is going to be

3.2

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Can someone please help me asappp!

alekssr [168]

Answer:

Step-by-step explanation:

4 0

3 years ago

Weiming, Joyce and Siti divide cookies to sell in a ratio of 5: 12: 9. After Weiming sold 28 cookies, the ratio becomes 1: 8: 6.

Strike441 [17]

Answer:

216 cookies

Step-by-step explanation:

From the question,

Let the total cookies in the first place be x cookies.

Their ratio = 5:12:9

Total = 5+12+9 = 26.

Weiming share = (5/26)x = 5x/26

If weiming sold 28 cookies

⇒ (5x/26)-28

⇒ (5x-728)/28

Hence Weiming new share = (5x-728)/28 cookies

The new ratio is 1:8:6

The total cookies becomes = x-28

Therefore,

(1/15)(x-28) = (5x-728)/28

(x-28)/15 = (5x-728)/28

Crossmultiply

28(x-28) = 15(5x-728)

28x-784 = 75x-10920

Collect like terms

28x-75x = -10920+784

-47x = -10136

x = -10136/-47

x = 215.7

x ≈ 216 cookies

8 0

2 years ago

Jessica has 48 coins, some of them are nickels and some are dimes. How many of each does she have if she has $3.25 total? 69 POI

Mrrafil [7]

Answer:

Nickels = 44.6

Dimes = 3.4

Step-by-step explanation:

We know that Jessica has 48 coins of which some are nickels and some are dimes so we can write it as:

n = amount of nickels

d = amount of dimes

$n+d=48$ --- (1)

We are to find the number of nickels and dimes if their total worth is $3.25.

Since a dime is worth 10¢ and a nickel is 5¢, so it should be:

$0.05n + 0.3d = 3.25$ --- (2)

From (1):

$n=48-d$

Substituting this value of $n$ in (2) to get:

$0.05(48-d) + 0.3d = 3.25$

$2.4-0.05d+0.3d=3.25$

$2.4+0.25d=3.25$

$0.25d=0.85$

$d=3.4$

Finding $n$ by substituting the value of $d$ :

$n=48-d$

$n=48-3.4$

$n=44.6$

6 0

3 years ago

Read 2 more answers

Vaughn Manufacturing has three product lines. Its only unprofitable line is Corn Nuts, the results of which appear below for 201

elena-14-01-66 [18.8K]

Answer: The relevant costs are $18000 in the decision to eliminate this product line.

Step-by-step explanation:

Since we have given that

Sales = $1530000

Variable expenses = $1040000

Fixed expenses = $600000

Net loss = $110000

If product line is eliminated, 30% of the fixed expenses can be eliminated.

So, it becomes,

30% of $600000 is given by

$0.3\times 600000\\\\=\$18000$

Hence, the relevant costs are $18000 in the decision to eliminate this product line.

6 0

3 years ago

Can someone answer this and show me how u got it cause I’m kind of confused on this one

balu736 [363]

Answer:

26 1/32

Step-by-step explanation:

Doing good so far

To make an exponent positive, you need to make the number a fraction and move it to the opposite of what it is in (so 4^-3 = 1/4^3)

25 + 1 + (1/(4^3) + 1/(2^6))

26 + (1/64 + 1/64)

26 + 2/64

26 + 1/32

= 26 1/32

4 0

2 years ago