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3 years ago

Please solve -1/3e+1=-7

Mathematics

1 answer:

serious [3.7K]3 years ago

3 0

Answer:

E=-24

Step-by-step explanation:

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9. If f(x) = 5x-4 and f(2a) =156 , then what is the value of a?

solmaris [256]

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$f(x) = 5x - 4$

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$f(2a) = 5(2a) - 4$

$f(2a) = 10a - 4$

$156 = 10a - 4$

$10a - 4 = 156$

Add sides 4

$10a - 4 + 4 = 156 + 4$

$10a = 160$

Divide sides by 10

$\frac{10a}{10} = \frac{160}{10} \\$

$a = 16$

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7 0

3 years ago

How to subtract unlike fractions

topjm [15]

Find the common denominator for both unlike fractions.

EX: 1 2
12 8

The lowest common factor is both fractions is 24. Multiply both denominators to get 24.

Do not forget to multiply the numerators with the number you used to multiply the denominators together.

You do not have to multiply each side by the same number.

5 0

3 years ago

Consider a large shipment of 400 refrigerators, of which 40 have defective compressors. If X is the number among 15 randomly sel

Vlad [161]

Answer:

The required probability is 0.94

Step-by-step explanation:

Consider the provided information.

There are 400 refrigerators, of which 40 have defective compressors.

Therefore N = 400 and X = 40

The probability of defective compressors is:

$\frac{40}{400}=0.10$

It is given that If X is the number among 15 randomly selected refrigerators that have defective compressors,

That means n=15

Apply the probability density function.

$P(X=x)=^nC_xp^x(1-p)^{n-x}$

We need to find P(X ≤ 3)

$P(X\leq3) =P(X=0)+P(X=1)+P(X=2)+P(X=3)\\P(X\leq3) =\frac{15!}{15!}(0.1)^0(1-0.1)^{15}+\frac{15!}{14!}(0.1)^1(1-0.1)^{14}+\frac{15!}{13!2!}(0.1)^2(1-0.1)^{13}+\frac{15!}{12!3!}(0.1)^3(1-0.1)^{12}\\$