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3 years ago

6

A store has 80 modems in its inventory, 30 coming from source a and the remainder from source

1 answer:

Mrrafil [7]3 years ago

5 0

The number of defective modems in the inventory is 20%⋅ 30 + 8%⋅ 50 = 10 (out of 80). Note that the number of defectives in the inventory is fixed, i.e., we are not told that there is 1 8 probability that a modem in the inventory is defective, but rather that exactly 1 8 of all modems are defective. The probability that exactly two modems in a random sample of five are defective is = 0.102

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Please help will give brainliest

Nonamiya [84]

Answer:

$c = 4$

Step-by-step explanation:

For this triangle we have to

$A=63\\C=49\°\\c=3\°$

Now we use the sine theorem to find the length of a:

$\frac{sin(A)}{a}=\frac{sin(B)}{b}=\frac{sin(C)}{c}$

Then:

$\frac{sin(A)}{a}=\frac{sin(C)}{c}\\\\a=\frac{sin(A)}{\frac{sin(C)}{c}}\\\\a=c*\frac{sin(A)}{sin(C)}\\\\a=(3)\frac{sin(63)}{sin(49)}\\\\c=4$

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3 years ago

1. What is the algebraic expression for the following word phrase:

Anna11 [10]

Answer & Step-by-step explanation:

a. 4x + 3 {sum means add the numbers together}

b. $\frac{5}{9 + y}$ {quotient means divided by}

c. $\frac{7}{y}$

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2 years ago

1+3+5+7+9+11+13+15+17+19+21 without adding

alexgriva [62]

Answer:

121

Step-by-step explanation:

1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 is a sum of first 11 odd numbers.

$\sf \boxed{\text{\bf Sum of first n odd numbers = $n^2$}}$

Here, n is the number of terms.

In this sequence, there are 11 terms.

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3 0

2 years ago

Read 2 more answers

Is 99 squared over 3 rational or irrational

Vitek1552 [10]

Irrational hope this helps!!

7 0

3 years ago

One number is 8 more than another. Their product is -16.

vekshin1

Answer:

The two numbers are 4 and -4

Step-by-step explanation:

Turn the words into equations: let's assign one number to be x and the other to be y

x+8=y

x*y=-16

To solve, substitute the value of y in the first equation into y in the second equation.

This gives x*(x+8)=-16

Simplifying gives x^2+8x=-16

x^2+8x+16=0

(x+4)^2=0

x=-4

plug this value of x back into the first equation, -4+8=y, y is 4

Now to make sure the answer is correct: 4 is 8 more than -4, and 4*-4 does equal 16

7 0

1 year ago