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jek_recluse [69]

3 years ago

5

What do you need to do first to solve this equation ? -6x +4= -20

1 answer:

Savatey [412]3 years ago

6 0

Answer:

subtract 4 from both sides

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3 equivalent fractions for 9/7

yawa3891 [41]

To find three equivalent fractions of a fraction, simply multiply the fraction by a common factor.

For example, multiple both the numerator and denominator of 9/7 by 2.
This will give you a fraction of 18/14, which is equivalent.

You can do this with any number you like to create three equivalent fractions.

5 0

3 years ago

Suppose that prior to conducting a coin-flipping experiment, we suspect that the coin is fair. How many times would we have to f

STALIN [3.7K]

Answer: b) 84

Step-by-step explanation:

Let p be the prior estimate of the required proportion.

As per given , we have

p =0.5 (The probability of getting heads on a fair coin is 0.5)

Significance level : $\alpha: 1-0.90=0.10\\$

Critical z-value (using z-value table ) : $z_{\alpha/2}=1.645$

Confidence interval width : w= 0.18

Thus , the margin of error : $E=\dfrac{w}{2}=0.09$

Formula to find the sample size ( if prior estimate of proportion is known.):-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

Substitute the values , we get

$n=0.5(1-0.5)(\dfrac{1.645}{0.09})^2$

Simplify ,

$n=83.5192901235\approx84$ [Round of to the next whole number.]

Hence, the number of times we would have to flip the coin =<u>84</u>

hence, the correct answer is b) 84

8 0

3 years ago

HELP. ME. PLEASE.<br><br><br><br><br> .....................................

Goshia [24]

Answer:

it's C just did the quiz and go it right

8 0

1 year ago

What is the sum of the geometric sequence-1 6 -36 yes there are 7 terms

vagabundo [1.1K]

Answer:

-39991'

Step-by-step explanation:

We require the sum of 7 terms of the G.S. -1, 6, -36 .....

The common ratio r = 6/-1 = -6 and the first term = -1.

Sum of n terms = a1 . (r^n - 1) / (r - 1)

Sum of 7 terms = -1 * (-6)^7 - 1) / (-6 - 1)

= -1 * 39991

= -39991 (answer).

7 0

2 years ago

Read 2 more answers

Suppose a jar contains 8 red marbles and 14 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the pro

NikAS [45]

it would most likely be blue because its more

it would be a 57.1429%. of blue

8 0

2 years ago