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Leokris [45]
3 years ago
5

Which type of factoring is used to factor the following expression: 2x^2 + 7x- 30

Mathematics
1 answer:
svetlana [45]3 years ago
7 0

Answer:

 (2x - 5) • (x + 6)

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A doctor compiles a numbered list of all his 350 patients. He selects every 25th patient to receive a survey after
Vinil7 [7]

Answer: This does not represent an SRS because each group of patients chosen does not have an equally likely chance of being chosen.

4 0
3 years ago
For one Geometry test, Nancy correctly answered 18 questions. These correct answers gave her a percent score of 72%. In total, h
Brrunno [24]

Answer:

25 questions.

Step-by-step explanation:

Correct answer = 18

The percent score of the correct answers is 72%.

Let there are x questions in the test. So,

According to the given condition,

72\%\ of\ x=18\\\\\dfrac{72}{100}x=18\\\\x=\dfrac{18\times 100}{72}\\\\x=25

Hence, there were 25 questions in the geometry test.

4 0
3 years ago
Solve the following system of equations. Enter the y-coordinate of the
nadya68 [22]

Answer:

<em>Good L</em>uck!

Step-by-step explanation:

8 0
2 years ago
A trimming operation at a local manufacturer produces rods whose length conforms to unifrom distribution with a minimum of 18cm
MariettaO [177]

Answer:

The probability that randomly selected road will be at least 25.8 cm long will be 48%.

Step-by-step explanation:

Given: uniform distribution with min and max values of 18 and 33 respectively.

To find : probability density for upper cumulative frequency i.e 25.8 at least means x\geq25.8  upto 33 cm i.e the maximum limit of function.

Solution:

we have by definition , of uniform distribution

we get , probability density function defines as :

<em>F(x,a,b)= </em>\frac{1}{b-a}<em>   </em>a\leq x\leq b

            =1/(33-18)=1/15=0.0667.

this is probability density function.

here the x=25.8 , a=18 and b=33

for lower cumulative frequency it defines as ;

P(x,a,b)=\frac{x-a}{b-a} =25.8-18/33-18=0.52

for upper cumulative frequency it defines as ;

Q(x,a,b)=b-x/b-a=33-25.8/33-18=0.48

here at least 25.8 cm probability means it should be greater than a value(18cm) hence it is provided by the upper cumulative frequency

i.e. Q(x,a,b)=0.48

The probability that randomly selected road will be at least 25.8 cm long will be 48%.

7 0
3 years ago
10x +y =6 written in slope intercept form​
hodyreva [135]

Answer:

y = -10x + 6

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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