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3 years ago

6) Solve the equation *

Mathematics

1 answer:

anzhelika [568]3 years ago

6 0

Answer:

You can use desmos it is really helpful if it dosen't work for you add a comment

Step-by-step explanation:

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Plz help i cant figure out the second one

Georgia [21]

Answer:

y=-4x+50, y=2x-10 ( i think)

Step-by-step explanation:

4 0

3 years ago

What is the 15th term of the sequence A(n) = 50 - 3(n-1) ?

Alexus [3.1K]

Answer:

$A(15)=8$

Step-by-step explanation:

Given that,

$A(n)=50 - 3(n-1)$

We need to find the 15th term of the sequence. Put n = 15 in the above sequence so that,

$A(15)=50 - 3(15-1)\\\\A(15)=50-3(14)\\\\A(15)=50-42\\\\A(15)=8$

So, the 15th term of the sequence is 8.

7 0

3 years ago

An agency is studying the income of store managers in the retail industry. A random sample of 25 managers reveals a sample mean

aalyn [17]

Answer:

The Confidence Interval = ($44,745.55 , $46,094.45)

Step-by-step explanation:

The formula for Confidence Interval =

Confidence Interval = Mean ± z × Standard deviation/√n

Where n = number of samples = 25 managers

Standard deviation = $2,050

Mean = $45,420

z = z score of the given confidence interval

= z score of 90% confidence interval

= 1.645

Confidence Interval = $45,420 ± 1.645 × $2,050/√25

= $45,420 ± 1.645 × $2,050/5

= $45,420 ± 674.45

Confidence Interval =

$45,420 - 674.45 = $44,745.55

$45,420 + 674.45 = $46,094.45

Therefore, the Confidence Interval = ($44,745.55 , $46,094.45)

3 0

3 years ago

Cos²(90° -X).tan(180°-X).cos(180°+X)/sin(180°-X)

Naya [18.7K]

Recall some identities:

tan(x) = sin(x) / cos(x)

cos(x + y) = cos(x) cos(y) - sin(x) sin(y)

cos(x - y) = cos(x) cos(y) + sin(x) sin(y)

sin(x - y) = sin(x) cos(y) - cos(x) sin(y)

This means we have

• cos²(90° - x) = [cos(90°) cos(x) + sin(90°) sin(x)]²

… = sin²(x)

• tan(180° - x) = sin(180° - x) / cos(180° - x)

… = [sin(180°) cos(x) - cos(180°) sin(x)] / [cos(180°) cos(x) + sin(180°) sin(x)]

… = sin(x) / (-cos(x))

… = -tan(x)

(and we also get sin(180° - x) = sin(x))

• cos(180° + x) = cos(180°) cos(x) - sin(180°) sin(x)

… = -cos(x)

So, the given expression reduces to

sin²(x) (-tan(x)) (-cos(x)) / sin(x) = sin²(x)

since tan(x) and cos(x)/sin(x) = 1/tan(x) will cancel.

3 0

3 years ago

Interquartile range n stuff

snow_lady [41]

Answer:

Can u add a better photo please

Step-by-step explanation:

3 0

3 years ago