3 years ago

Solve the following.

Mathematics

1 answer:

Elina [12.6K]3 years ago

4 0

The answer to this question isB

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What is the value of y in the equation 5x + 2y = 20, when x = 0. 3 A) 2.5 B) 2.8 C) 9.25 D) 10.75

NemiM [27]

// Plug x into the equation

5(0.3)+2y=20
1.5+2y=20

// Subtract 1.5 from each side

2y=18.5

//Divide each side by 2

y=9.25 (C)

5 0

2 years ago

What is the result of subtracting the second equation from the first?<br> -2x+y=0<br> 7x+3y=2

ikadub [295]

Answer:

5x -2y = -2

Step-by-step explanation:

-2x+y=0

-7x+3y=2

Subtract the second equation from the first

-2x+y=0

7x-3y=-2

------------------

5x -2y = -2

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2 years ago

Suppose that past history shows that 60% of college students prefer brand c cola. a sample of 5 students is to be selected. base

creativ13 [48]

The probability is 0.337.

The probability that more than 3 prefer brand c is the same as finding the probability that 4 or 5 prefer brand c. Using a binomial distribution,

$_5C_4(0.6)^4(0.4)^{5-4}+_5C_5(0.6)^5(0.4)^{5-5}
\\
\\=\frac{5!}{4!1!}(0.6)^4(0.4)^1+\frac{5!}{5!0!}(0.6)^5(0.4)^0
\\
\\=5(0.6)^4(0.4)+1(0.6)^5(1)=0.33696\approx0.337$

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2 years ago

What is the slope of the line that passes through the points (1,1) and (9,7)?

aalyn [17]

It's 3/4, simple enough just do delta y over delta x

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Rzqust [24]

Answer:

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2 years ago