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Ugo [173]
4 years ago
11

Which factor do the following have in common? 2x^2-x-28. 2x^2-15x+28

Mathematics
1 answer:
SVETLANKA909090 [29]4 years ago
6 0
2x^2-x-28= (2x+7)(x-4)
2x^2-15x+28= (2x-7)(x-4)
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the perimeter of a pool table is 30 ft.The table is twice as long as it is wide.what is the length of the pool table.
noname [10]
Perimeter is legnth +legnth + width + width or
P=2L+2W

L=2W
subsitute L=2W for L in P=2L+2W

P=2(2W)+2W
P=4W+2W
P=6W

we know that Perimiter=30 so
30=6W
divide both sides by 6
5=Width

subsitute W=5 for W in L=2W
L=2(5)
L=10

to check
10=2(10)+2(5)
30=20+10
30=30
checks


Legnght=10
Width=5
4 0
4 years ago
Samuel bought 4 rolls of tape to seal boxes. Each roll contains 32.9 meters of tape. He uses 1 1/5 meters of this tape to seal e
Anestetic [448]

Answer:

109.33 boxes

Step-by-step explanation:

The first step is to calculate the total number of tape

= 32.9 × 4

= 131.6 m

Therefore the total number of boxes that Samuel will use to seal the boxes can be calculated as follows

= 131.6/ 1 1/5

= 131.6 ÷ 6/5

= 131.6 × 5/6

= 658/6

= 109.33 boxes

5 0
3 years ago
Suppose that Professor Rodgers needs one small group of students from his class to participate in a focus group. There are 11 st
irinina [24]

Answer:

(A) 165

(B) 330

Step-by-step explanation:

Total number of students in the class = 11

(A) How many different combinations of 3 selected students can he create?

ⁿCₓ = n! ÷ [(n - x)! x!]

n = 11,  x = 3

11! / [8! 3!]  = 165

<em>HINT:  8! or 8 factorial represents [8x7x6x5x4x3x2x1]</em>

(B) How many different combinations of 4 selected students can he create?

ⁿCₓ = n! ÷ [(n - x)! x!]

n = 11,  x = 4

11! / [7! 4!]  = 330

<em>Same hint applies here, for all numbers with the factorial sign.</em>

4 0
3 years ago
Krystal made 8 quarts of soup on Monday 5 quarts of soup on Tuesday and 5 quarts of soup on Wednesday. If she serves each guest
AlladinOne [14]
You have to add these together to find the total number of quarts she made. 8+5+5= 18 quarts of soup. if everyone gets one cup, then 18 people is able to get soup. the answer is 18 guests
8 0
4 years ago
We are stuck on this problem.
mezya [45]

Answer:

The measure of angle BED is 78°

Step-by-step explanation:

Hopefully you can see what I did there.

6 0
3 years ago
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