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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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Express each ratio as a fraction in lowest terms.
uranmaximum [27]
1. 5/6
2. 7/1
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Just write the first number as the numerator and the second one as a denominator then divide by their common factors
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3 years ago
Eight more than three times the difference of four and a number” when n = 3?
Snezhnost [94]
8 + 3 (4 - n )
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There were 756 students enrolled in a freshman-level chemistry class. By the end of the semester, the number of students who pas
Alexandra [31]

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Step-by-step explanation:

8 0
3 years ago
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Can someone please help me with these questions!! Thanks,
fiasKO [112]

6a. 1 - 2sin(x)² - 2cos(x)² = 1 - 2(sin(x)² +cos(x)²) = 1 - 2·1 = -1

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8 0
3 years ago
1-4y^2 = 0<br> Solve the equation
Romashka [77]

Answer: y = 1/2 or y = -1/2

Step-by-step explanation:

First move the 1 to the side with the 0

-4y^2 = -1 // -1 because when you move a number to the other side of the equation  you have to multiply -1

Then divide by -4 on each side

y^2 = 1/4

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|y| = 1/2 // sq rt y^2 becomes an absolute value because when you square root a square it automatically becomes an absolute value

so the answer would be y = 1/2 or -1/2

to check just put it into the equation as y. Both work.

4 0
2 years ago
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