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Oksi-84 [34.3K]
3 years ago
8

Will give brainliest.

Mathematics
1 answer:
e-lub [12.9K]3 years ago
3 0
Y=2x-4 is the correct slope intercept form answer.
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a refigerator was sold $890. this price included a 30% mark-up on the cost price. calculate the cost price
miss Akunina [59]
Cost price is $684.62

Given:
Sales price = $890
Mark-up on cost price = 30%
Cost Price = ?

The sales price includes the 30% mark-up on cost price. This means that the cost price is the 100% and the Sales price is 130% of the cost price. To get the cost price, we need to divide the sales price by its percentage.

Sales price :          130%     $890
Cost price              100%
Mark-up on cost      30%

890 ÷ 130% = 684.62

to check:
684.62 * 30% = 205.39
684.62 + 205.38 = 890
8 0
3 years ago
Read 2 more answers
Find each f(c) using synthetic substitution. f(x) = –x7 + 4x6 – 4x5 – 6x4 – 3x3 – 6x2 – x – 2; c = –5
zmey [24]

Answer:

<em>f(-5)=149603</em>

Step-by-step explanation:

<u>Synthetic Substitution</u>

It's a method to find the value of a polynomial for a given value of x. The polynomial we want to evaluate is

f(x) = -x^7 + 4x^6 - 4x^5 - 6x^4 - 3x^3 - 6x^2 - x - 2

at x=-5

We can, of course, just replace x for -5 and compute the powers, products and sums and subtractions, but we can use the synthetic substitution to avoid the powers, just by multiplying and adding or subtracting. The method requires us to use only the coefficients of the ordered and complete polynomial as shown:

-1  4  -4  -6  -3  -6  -1  -2

Now we set up an arrangement where we can place some operations

     -1  4  -4  -6  -3  -6  -1  -2

-5

The second row and a new third row will be filled by computing values as explained below.

The first value of the third row is the very same first coefficient (-1)

     -1   4   -4   -6   -3   -6   -1   -2

-5

     -1

The second value of the second row is the -5 times the first value of the third row: (-5)(-1)=5

Next value of the third row is the sum of the values above of it: 4+5=9

-1 4 -4 -6 -3 -6 -1 -2

-5  5

-1 9

Now we proceed the same with next values to get the full arrangement or synthetic substitution

-1 4 -4 -6 -3    -6  -1  -2

-5  5 -45 245 -1195 5990 -29920 149605

-1 9 -49 239 -1198 5984 -29921 149603

The very last value of the third row is the required substitution

f(-5)=149603

The formatted table can be seen in the image below

5 0
3 years ago
How to simplify -9+-1/3y+6-4/3y​
Bezzdna [24]

Answer:

-9+-1/3y+6-4/3y​

-9 + 6 -1/3y -4/3y

-3 -5/3y

Step-by-step explanation:

-9+-1/3y+6-4/3y​

-9 + 6 -1/3y -4/3y

-3 -5/3y

3 0
3 years ago
Brad and sally made a total of 31 cakes for the school bake sale. Sally made 7 fewer cakes than brad. How many cakes did brad ma
Anvisha [2.4K]

Answer:

brad made 19 cakes, sally made 12

Step-by-step explanation:

5 0
2 years ago
If 16 to the power of x = 1/64. what is the value of x?
Daniel [21]

Answer:

-3\2

Step-by-step explanation:

::::::::;;:;;;;;;;;;

6 0
3 years ago
Read 2 more answers
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