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4 years ago

Please solve this it’s about math

Mathematics

1 answer:

sineoko [7]4 years ago

3 0

#3 - [D = (6 - 2)^2 + (4 - 1)^2] [] >> D= [Square root of} 16+9

So the awnser to #3 is - 5

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What are the solutions of 2x^2+3x-7=x^2+5x+39

sveticcg [70]

Answer:

${x}^{2} - 2x - 46$

Step-by-step explanation:

${2x}^{2} + 3x - 7 = {x}^{2} + 5x + 39$

Collect like terms

${2x }^{2} - {x}^{2} + 3x - 5x - 7 - 39$

${ x}^{2} - 2x - 46$

7 0

4 years ago

Someone please help me with this

navik [9.2K]

Answer:

The 2nd option.

3 0

3 years ago

When Θ = 5 pi over 3, what are the reference angle and the sign values for sine, cosine, and tangent?

Sonbull [250]

Answer:

the reference angle is given by $\frac{\pi}{3}$

sine = negative

cosine = positive

tangent = negative

Step-by-step explanation:

We have been given the angle $\theta=\frac{5\pi}{3}$

The angle lies in Quadrant IV. Hence, in order to find the reference angle, we can subtract this angle with $2\pi$

Therefore, the reference angle is given by

$2\pi - \frac{5\pi}{3} \\\\=\frac{\pi}{3}$

In Quadrant IV, cosine and secant functions are positive and rest trigonometric functions are negative.

Thus, we have

sine = negative

cosine = positive

tangent = negative

4 0

4 years ago

Read 2 more answers

An advertisement for a circular rug says that the rug has a diameter of 6 feet. Find the relative error of this measurement

Aleonysh [2.5K]

Answer:

1. 8.3%

Step-by-step explanation:

Relative error = absolute error/expected measurement

The expected measurement is given as 6 ft.

Now, the absolute error is usually equal to half of a unit of the measure.

This means the absolute error in this case is ½ × 1 = 0.5 ft

Thus, the exact measurement will be;

6 ± 0.5

Thus;

Relative error = 0.5/6

Relative error = 0.083

Expressing it in percentage gives 8.3%

4 0

3 years ago

Three businesses donated money to charity. The chart shows the pledges made by the businesses. Business B pledged $20 million le

Masja [62]

Answer:

Business A= x

Business B= 2x-2,000,000

Business C= 2(2x-2,000,000)-2,000,000

Step-by-step explanation:

Don't feel like explaining this unless you really want me to. Also, brainliest would really be appreciated.

8 0

3 years ago