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3 years ago

Can someone please help

Mathematics

2 answers:

zmey [24]3 years ago

7 0

The answer is d :).

tankabanditka [31]3 years ago

3 0

Correct answer is D :)

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Solve for x: |2x + 6| − 4 = 20

lord [1]

I believe the answer is C

5 0

3 years ago

0.0002 in scientific notation

Westkost [7]

Answer:

2 * 10 ^-4

Step-by-step explanation:

We need the first number to be between 1 and less than 10

.0002

2 * 10 ^ exponent

We move the decimal 4 places to the right. Since we move it to the right the exponent is negative and is the number of places we moved the decimal

2 * 10 ^-4

4 0

4 years ago

PLEASE HELP ( I can mark if brainlest, no fake answers please)

Liula [17]

Answer:

$80

Step-by-step explanation:

plug 40 into each equation for x

50+12(40)

simplify

50+480

simplify

530

10+15(40)

simplify

10+600

610

now subtract 530 from 610

610-530

7 0

3 years ago

If the gcd of 5 and 12 is 1 then

Art [367]

Answer:

The greatest common divisor (gcd) of two or more numbers referst to the largest positive integer that divides each of the integers. Also, two integers are said to be relatively prime, mutually prime, or coprime if the only positive integer that divides both of them is 1. Therefore, If the GCD of 5 and 12 is one, it means that the two numbers are mutually prime.

6 0

3 years ago

The Graduate Record Examination (GRE) is a standardized test that students usually take before entering graduate school. Accordi

lesantik [10]

Answer:

(a) The first quartile is 382.27 and it means that at least el 25% of the scores are less than 382.27 points.

The second quartile is 462 and it means that at least el 50% of the scores are less than 462 points.

The third quartile is 541.73 and it means that at least el 75% of the scores are less than 541.73 points.

(b) The 99th percentile is 739.27 and it means that at least el 99% of the scores are less than 739.27 points.

Step-by-step explanation:

The first, second the third quartile are the values that let a probability of 0.25, 0.5 and 0.75 on the left tail respectively.

So, to find the first quartile, we need to find the z-score for which:

P(Z<z) = 0.25

using the normal table, z is equal to: -0.67

So, the value x equal to the first quartile is:

$z=\frac{x-m}{s}\\ x=z*s +m\\x =-0.67*119 + 462\\x=382.27$

Then, the first quartile is 382.27 and it means that at least el 25% of the scores are less than 382.27 points.

At the same way, the z-score for the second quartile is 0, so:

$x=0*119+462\\x=462$

So, the second quartile is 462 and it means that at least el 50% of the scores are less than 462 points.

Finally, the z-score for the third quartile is 0.67, so:

$x=z*s +m\\x =0.67*119 + 462\\x=541.73$

So, the third quartile is 541.73 and it means that at least el 75% of the scores are less than 541.73 points.

Additionally, the z-score for the 99th percentile is the z-score for which:

P(Z<z) = 0.99

z = 2.33

So, the 99th percentile is calculated as:

$x=z*s +m\\x =2.33*119 + 462\\x=739.27$

So, the 99th percentile is 739.27 and it means that at least el 99% of the scores are less than 739.27 points.

8 0

3 years ago