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2 years ago

Factor completely 7x²-9x-10

Mathematics

2 answers:

prohojiy [21]2 years ago

7 0

(X - 2)(7x + 5) this should be your answer

Shtirlitz [24]2 years ago

5 0

Answer:

First, assign a value to x. x will be 2 in this case.

Next, multiply x by itself, because that is what exponent 2, or squared, means. 2 x 2 = 4

Now, multiply 4 by 7. 4 x 7 = 28

Next, find the value of 9x.

The value of 9x will be 9 times a number, x, also known as 2 in this scenario. 9 x 2 = 18

Then, subtract 28 from 18. 28 - 18 = 10

Lastly, subtract 10. 10 - 10 = 0

Therefore,

The answer is 0. Product may vary depending on value assigned to x.

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2 years ago

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ExtremeBDS [4]

Answer:

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2 years ago

In a survey, of the voters support a particular referendum. If 40 voters are chosen at random, find the mean and variance for th

Katyanochek1 [597]

This question is incomplete, the complete question is;

In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random,

find the mean and variance for the number of voters who support the referendum.

Answer:

a) The Mean is 22

b) Variance is 9.9

Step-by-step explanation:

Given that;

55% of the voters support a particular referendum p = 0.55

q = 1 - p = 1 - 0.55 = 0.45

sample size n = 40

Mean = sample size n × p

Mean = 40 × 0.55

Mean = 22

Therefore the Mean is 22

Variance = n × p × q

so we substitute

Variance = 40 × 0.55 × 0.45

Variance = 9.9

Therefore the Variance is 9.9

3 0

3 years ago

The hypotenuse of a right triangle is 50 and the short leg is 30, find the projection of the leg onto the hypotenuse

gladu [14]

Consider the attached figure. All the triangles shown are similar, so

CB/CA = CD/CB
30/50 = projection/30
projection = 30^2/50
projection = 18

6 0

3 years ago

SOMEONE PLEASE HELP ITS DUE TONIGHT EXPLANATION = BRAINLIEST

Vaselesa [24]

Given:

Radius of the circle = 4 meters

Measure of arc = 135 degrees

To find:

The area of the sector bounded by the given arc.

Solution:

Formula for area of a sector is:

$A=\pi r^2\times \dfrac{\theta}{360^\circ}$

Where, r is the radius and $\theta$ is the central angle or measure of intercepted arc.

Putting $r=4,\ \theta =135^\circ$ in the above formula, we get

$A=\pi \times (4)^2\times \dfrac{135^\circ}{360^\circ}$

$A=\pi \times 16\times \dfrac{3}{8}$

$A=\pi \times 2\times 3$

$A=6\pi$

Therefore, the exact area of the given sector is $6\pi$ square meters.

3 0

3 years ago

Factor completely 7x²-9x-10​

Factor completely 7x²-9x-10