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3 years ago

Line z has a slope of 2.5 and goes through point (4, 13). Which equation best represents line z?

Mathematics

1 answer:

tatuchka [14]3 years ago

4 0

Answer:

y = my + b

Step-by-step explanation:

According to my calculations. the equation best representing Z is the one above

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Complete the identity. sin4x - cos4x = ?

Katyanochek1 [597]

Since sin(2x)=2sinxcosx, we can plug that in to get sin(4x)=2sin(2x)cos(2x)=2*2sinxcosxcos(2x)=4sinxcosxcos(2x). Since cos(2x) = cos^2x-sin^2x, we plug that in. In addition, cos4x=cos^2(2x)-sin^2(2x). Next, since cos^2x=(1+cos(2x))/2 and sin^2x= (1-cos(2x))/2, we plug those in to end up with 4sinxcosxcos(2x)-((1+cos(2x))/2-(1-cos(2x))/2)
=4sinxcosxcos(2x)-(2cos(2x)/2)=4sinxcosxcos(2x)-cos(2x)
=cos(2x)*(4sinxcosx-1). Since sinxcosx=sin(2x), we plug that back in to end up with cos(2x)*(4sin(2x)-1)

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4 years ago

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I kinda need a lot of help

anzhelika [568]

Answer:600

Step-by-step explanation: 6 times 10 times 10 equals to 600 because 6 times 10 is 60 and 60 times 10 is 600

8 0

3 years ago

A ball is thrown into the air with an upward velocity of 24 ft/s. Its height h in feet after t seconds is given by the function

Natalija [7]

<span>D. 0.75 s; 16 ft is the best choice

</span>

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3 years ago

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Jordan needs 6 3/10 gallons of milk to make four and a half gallons of ice cream. how many gallons of milk would Jordan need to

Masteriza [31]

Answer:

it would take 1 4/10 gallons of milk to make 1 gallon of ice cream.

Step-by-step explanation:

4.5/1=6.3/x

4.5x=6.3

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hope that helps have a good day

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2 years ago

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6. Number of passengers who arrive at the platform in an Amtrack train station for the 2 pm train on a Saturday is a random vari

Aleks04 [339]

Answer:

99.7%

Step-by-step explanation:

Mean number of passengers (μ) = 180 passengers

Standard deviation (σ) = 20 passengers

The number of standard deviation from the mean for the lower and upper bounds of the 120 to 240 passengers intervals are:

$L = \frac{180-120}{20} =3\\U = \frac{240-180}{20} =3$

Therefore, all of the data is within 3 standard deviations from the mean. According to the empirical rule, 99.7% of the data is within 3 standard deviations from the mean. Therefore, we can assert with a 99.7% probability that there will be between 120 and 240 passengers.

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3 years ago