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2 years ago

Solve x^2 – 3x = –8 using the quadratic formula.

Mathematics

1 answer:

Zina [86]2 years ago

3 0

Answer:

on your scientific calculator click on MODE then number 5 then number 3 and put those numbers x^2 – 3x = –8

(AFTER WRITING EACH NUMBER CLICK ON = SO YOU CAN PUT THE OTHER NUMBERS. FOR EXAMPLE, WRITE 1 AS A THEN CLICK = AND SO ON)

1 and A (write 1 first then click =)

-3 as B (write -3 then click =)

+8 as C (write 8 then click =)

then you will get the answer of x1 and 2

Step-by-step explanation:

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Consider the equation x^2= -36, what are the solutions?

Kruka [31]

The correct answer is: [D]: "no real solutions" .
_____________________________________________________
The only "answers" would be: " <span>± 6i " ;
</span> → <span>both of which are not "real solutions" .
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</span>

7 0

3 years ago

The height, in inches, of a randomly chosen American woman is a normal random variable with mean μ = 64 and variance 2 = 7.84. (

Schach [20]

Answer:

Step-by-step explanation:

Given that the height in inches, of a randomly chosen American woman is a normal random variable with mean μ = 64 and variance 2 = 7.84.

X is N(64, 2.8)

Or Z = $\frac{x-64}{2.8}$

a) the probability that the height of a randomly chosen woman is between 59.8 and 68.2 inches.

$=P(59.8$

b) $P(X\geq 59)\\= P(X\geq -1.78)\\ \\=0.9625$

c) For 4 women to be height 260 inches is equivalent to

4x will be normal with mean (64*4) and std dev (2.8*4)

4x is N(266, 11.2)

$P(4x>260)= \\P(Z\geq -0.53571)\\=0.7054$

d) Z is N(0,1)

E(Z19) = $P(Z>19)\\= 0.000$

since normal distribution is maximum only between 3 std deviations form the mean on either side.

3 0

3 years ago

Please help me solve this

Genrish500 [490]

Answer:

Solve what?

Step-by-step explanation:

You didn't put the question.

6 0

2 years ago

Suppose all the counting numbers are arranged in columns as shown at the right. Under what letter will the number 1000 appear?

pentagon [3]

Letter D because you need to multiply all the letters of the alfabet (36) and multiply 36 by 1000 and then divide the answer by 100 and you get the letter D

4 0

3 years ago

Answer YES if is a Right Triangle or NO if is not

Vilka [71]

Answer:

Part A: yes

Part B: yes

Part C: yes

Step-by-step explanation:

Part A:

77² + 420² = 427²

5,929 + 176,400 = 182,329

182,329 = 182,329

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Part B:

279² + 440² = 521²

77,841 + 193,600 = 271,441

271,441 = 271,441

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Part C:

39² + 760² = 761²

1,521 + 577,600 = 579,121

579121 = 579,121

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7 0

3 years ago