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3 years ago

Please help!! BRAINLIEST to correct answer!!

Mathematics

1 answer:

ira [324]3 years ago

7 0

Answer:

b. -(x - 7)(x + 10)

Step-by-step explanation:

-x² - 3x + 70

-(x - 7)(x + 10)

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The angle turns through 1/12th of the circle what is the measure of the angle

UNO [17]

Answer:

30°

Step-by-step explanation:

A full circle has 360°.

1/12 of a circle has 1/12 of 360°.

1/12 * 360° = 360°/12 = 30°

Answer: 30°

6 0

3 years ago

Which is an equation?<br> a. 17 + x<br> b. 45 / x <br> c. 20x = 200<br> d. 90 - x

eimsori [14]

C. 20x = 200 because an equation always has an equal sign and other three are expressions because it doesn't have any signs, hoped this helped:)

6 0

3 years ago

A city council consists of eight Democrats and eight Republicans. If a committee of six people is selected, find the probability

saw5 [17]

Answer:

39.16% probability of selecting three Democrats and three Republicans

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this question, the order in which the people are selected is not important. So we use the combinations formula to solve this question.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

Desired outcomes:

3 Democrats, from a set of 8.

3 Republicans, from a set of 8.

$D = C_{8,3}*C_{8,3} = (C_{8,3})^{2} = (\frac{8!}{3!5!})^{2} = 56^2 = 3136$

Total outcomes:

6 people from a set of 16.

$T = \frac{16!}{6!10!} = 8008$

Probability:

$p = \frac{D}{T} = \frac{3136}{8008} = 0.3916$

39.16% probability of selecting three Democrats and three Republicans

5 0

3 years ago

Marcie bought a 59-foot roll of packing tape. She used two 8 5/6 foot lengths.How much tape is left on the roll?

madreJ [45]

Marcie has 41 1/3 feet of packing tape left.

8 5/6 times 2 makes 17 2/3. 59 minus 17 2/3 equals 41 1/3.

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3 years ago

Which statement is true about the equations –3x + 4y = 12 and x – y = 1?

Anastaziya [24]

The answer is the 4th choice

4 0

3 years ago