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hoa [83]
3 years ago
10

Factorise x2 - 3x - 28

Mathematics
2 answers:
a_sh-v [17]3 years ago
8 0

Answer:

(x+4)(x-7)

Step-by-step explanation:

GaryK [48]3 years ago
4 0

Answer:

( x + 4 ) ( x - 7 )

Step-by-step explanation:

x^2 - 3x - 28

= x^2 + 4x - 7x - 28

= x ( x + 4 ) - 7 ( x + 4 )

= ( x + 4 ) ( x - 7 )

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Andre owns a computer backup service. He charges his customers $2.50 for each backup CD. His expenses include $875 for the CD re
alukav5142 [94]

Answer:

p =2.15n - 875

Step-by-step explanation:

Given

CD_s= n

Charges = 2.50 per CD

<u>Expenses</u>

E_1 = 875

E_2 = 0.35 per CD

Required

The profit (p)

First, calculate the total income on n CDs

Total = Charges * n

Total = 2.50 * n

Total = 2.50n

Next, the expenses on n CDs

Expenses = E_1 + E_2 * n

Expenses = 875 + 0.35 * n

Expenses = 875 + 0.35n

The profit (p) is:

p = Total - Expenses

p =2.50n - (875 + 0.35n)

Open bracket

p =2.50n - 875 - 0.35n

Collect like terms

p =2.50n -  0.35n - 875

p =2.15n - 875

3 0
3 years ago
32 randomly picked people were asked if they rented or owned their own home, 8 said they rented. Obtain a point estimate of the
Romashka-Z-Leto [24]
Don’t you just subtract?

32-8=24 home owners!

Hope this helps
5 0
3 years ago
Multiple w and 8.Then,add 5
saw5 [17]

Answer:

8w+5

Step-by-step explanation:

8*w=8w

8w+5

3 0
3 years ago
PLS HELP <br> What is the median of this data set?
balu736 [363]

Answer:

$3.50

Step-by-step explanation:

add up all the x's and distribute them starting from the outside until you get to the middle. if there is an odd number of x's (which there isn't), the last x to be placed will be on the spot that is the median. If there is an even number of x's, and they both land on the same spot, that spot will be the median, and if they are next to each other, the median will be between them.

7 0
2 years ago
The length of a rectangle is five centimeters less than width. Find the dimensions of the
kondaur [170]

Answer:

w is 10 and l is 5

Step-by-step explanation:

l=w-5

lw=50

w^2-5w-50=(w-10)(w+5) since the negative solution does not make sense w=10 and therefore l is 5 so the length is 5 while the width is 10

8 0
3 years ago
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