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Kaylis [27]
3 years ago
12

I dont get this please help.

Mathematics
1 answer:
madam [21]3 years ago
3 0

40 out of 250 students speak French: 40 / 250 = 0.16

Multiply the number of students surveyed by 0.16:

30 x 0.16 = 4.8

Round up to 5 students.

Answer 5 students

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Which statement about y = x2 + 7x - 30 is true?
Lady_Fox [76]

Answer:

D. The zeros are 3 and -10, because y = (x - 3)(x + 10).

Step-by-step explanation:

y=x^2+7x-30

0=x^2+7x-30

0=(x+10)(x-3)

Therefore, D is correct by the Zero Product Property

4 0
3 years ago
Rate of change help?
Marianna [84]
When you have so many, it is convenient to use a spreadsheet or other technology to repeat the tedious task. See the table for the average rate of change.

It looks to me like the intervals you want are
  2 3 4 5 1 6

7 0
3 years ago
PLEASE HELP I GIVE THANKS
oksano4ka [1.4K]
Look at the pictures.

1. D (y=3)
2. y=3
3. y=-2
4. y=4
5. B (52 lb)

6 0
3 years ago
Who is right and why are they right?
ElenaW [278]
Its positive for the supermarkets oweners
8 0
3 years ago
the length of a soccer pitch is 20 m less than twice its width. the area of the pitch is 6000m^2. find its dimensions.
Setler79 [48]
X=width of a coccer pitch
2x-20=length of a soccer pitch
Area (rectangule)=length x width
We suggest this equation:
x(2x-20)=6000
2x²-20x=6000
2x²-20x-6000=0
x²-10x-3000=0
We solve this quadratic equation:

x=[10⁺₋√(100-4*1*-3000)]/2=[10⁺₋√(100+12000)]/2=
=(10⁺₋110)/2
we have two solutions:
x₁=(10-110)/2=-50, invalid solution.
x₂=(10+110)/2=60

x=60
2x-20=2(60)-20=120-20=100

Solution: the length is 100 m, and the width is 60 m.

To check:
Area=100 m*60 m=6000 m²
The twice of width is =2(60 m)=120 m,
20 m less than twice its width is: 120 m-20 m=100 m=the length.


8 0
3 years ago
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