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2 years ago

Find the value of x. (3x +20) (5x - 16) 0.5 74 18 2

Mathematics

1 answer:

weeeeeb [17]2 years ago

5 0

Answer:

i think the answer is 0.5

Step-by-step explanation:

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Fifty 6th grade students chose to play outside for free time. This is 25% of the 6th grade class. How many total students are th

Elena L [17]

Answer- 200

you need to find what number who’s 25th percent equal 50

7 0

2 years ago

Given that sin0=21/29 what is the value cos 0 for 0°< 0<90°

sp2606 [1]

Answer:

20/29

Step-by-step explanation:

sin θ = 21/29

Use Pythagorean identity:

sin² θ + cos² θ = 1

(21/29)² + cos² θ = 1

441/841 + cos² θ = 1

cos² θ = 400/841

cos θ = ±20/29

Since 0° < θ < 90°, cos θ > 0. So cos θ = 20/29.

3 0

2 years ago

Use the normal distribution of SAT critical reading scores for which the mean is 502 and the standard deviation is 116. Assume t

PSYCHO15rus [73]

Answer:

(a) 93.19%

(b) 267.3

Step-by-step explanation:

The population mean and standard deviation are given as 502 and 116 respectively.

Consider, <em>X</em> be the random variable that shows the SAT critical reading score is normally distributed.

(a) The percent of the SAT verbal scores are less than 675 can be calculated as:

$P(X$

Thus, the required percentage is 93.19%

(b)

The number of SAT verbal scores that are expected to be greater than 575 can be calculated as:

$P(X>575)=P(\frac{x-502}{116}>\frac{575-502}{116}\\P(X>575)=P(Z>\frac{575-502}{116})\\P(X>575)=P(Z>0.6293)\\P(X>575)=0.2673$

So,

Out of 1000 randomly selected SAT verbal scores, 1000(0.2673) = 267.3 are expected to have greater than 575.

8 0

2 years ago

!!HELP ME PLEASE!!

gulaghasi [49]

Answer:

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Step-by-step explanation:

A. Vertex at (−6, 1)

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3 years ago

You and your family took a trip over track out that was 1.5 hours away. Which two trips could your family have taken?

dusya [7]

Answer:

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Step-by-step explanation:

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2 years ago

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