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jolli1 [7]
3 years ago
6

In a survey of 420 people, 85% said they drink coffee

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
6 0
420 x 0.85 = 357

357 out of the 420 said they drink coffee. 
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I WILL GIVE YOU BRAINLIEST IF YOU ANSWER THE WHOLE QUESTION.
kicyunya [14]

Answer:

B)y=2x   and     C) y=-7x+9

Step-by-step explanation:

Once a linear function has a constant rate of change, you just have to find the linear functions. Also, the other ones are quadratic functions, and their graph are parabolas, which don't have a constant rate of change.

Considering f(x)=y

f(x) = 2x  has a constant positive rate of slope 2.  

$\frac{dy}{dx}=2 $

f(x)=-7x+9 has a constant negative rate of slope -7

$\frac{dy}{dx}=-7 $

5 0
3 years ago
Please help, I don't get this
Alex

Answer:

The answer is c

Step-by-step explanation:

My college brother told me this is the answer if it isn't I'm sorry but it's his fault

8 0
3 years ago
John can run 7 miles in 45 minutes. What is John's rate of speed in miles per hour?
Oksana_A [137]

Answer:

the answer is 6 i believe

3 0
3 years ago
How much fabric is needed to make a tent in the shape of a triangular prism with the following measures?
makvit [3.9K]

Answer:

The fabric needs 196.4 ft²

Step-by-step explanation:

∵ The tent formed formed from 4 faces

 two equilateral triangles with side length 7 ft

 two rectangles with dimensions 11 ft and 7 ft

∵ Area equilateral Δ = 1/4 S²√3

∵ Area rectangle = L × W

∴ The area of the prism = 2 × 1/4 × (7)²√3 + 2 × 7 × 11

                                       = 196.4 ft²

Note:

If you find the area of the triangle by the rule 1/2 × base × height

∴ Area Δ = 1/2 × (7) × 6 = 21 ft²

∴ Area tent = 2 × 21 + 2 × 77 = 196 ft²

Two answer very closed

5 1
3 years ago
Read 2 more answers
Jasmine was observing her farm from a hot air ballon when she accidently dropped her telescope. As always on earth the formula t
Darya [45]

Answer:

D=16m

Step-by-step explanation:

D=16t^2

D=16×1

D=16m

6 0
3 years ago
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