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leva [86]
3 years ago
9

Factor completely 5x(x+3)+6(x+3)

Mathematics
1 answer:
mars1129 [50]3 years ago
4 0

Answer:

5x2 + 21x + 18

Step-by-step explanation:

5x2 + 15x + 6x + 18 = 5x2 + 21x + 18

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If seven times a number is added to the squares of the number and the result is negative twelve, what are the numbers?
AleksAgata [21]
Let's name the number 'n'. Now write an equation. 7*n +n^2 =12Now you can form a quadratic. n^2 +7n-12=0. Now you can use a myriad of methods to solve it. If you still need help, just message me. 
6 0
3 years ago
The sum of -2 and three times a number
algol13
The sum (addition) of -2 and 3 times (3 ·) a number (n)

-2 + 3n
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3 years ago
The equation of a line is y = -3x. To which equation is the line parallel to? A. Y = 1 third x minus 4 B. Y = 3x + 10 C. Y = -10
Sergeeva-Olga [200]

Answer:

This line would be parallel to C. y = -10 - 3x

Step-by-step explanation:

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6 0
3 years ago
Find the sign of each of the following numbers a b c and if
wel

Answer:

numbers ABC sign <u>each</u><u> </u><u> </u><u> </u><u>following</u><u> </u><u> </u><u>find</u><u> </u><u>formula</u><u> </u>

4 0
2 years ago
A lottery game has balls numbered 1 through 21. What is the probability of selecting an even numbered ball or an 8? Round to nea
Viktor [21]

Answer: 0.476

Step-by-step explanation:

Let A = Event of choosing an even number ball.

B = Event of choosing an 8 .

Given, A lottery game has balls numbered 1 through 21.

Sample space: S= {1,2,3,4,5,6,7,8,...., 21}

n(S) = 21

Then, A= {2,4,6,8, 10,...(20)}

i.e. n(A)= 10

B= {8}

n(B) = 1

A∪B = {2,4,6,8, 10,...(20)} = A

n(A∪B)=10

Now, the probability of selecting an even numbered ball or an 8 is

P(A\cup B)=\dfrac{n(A\cup B)}{n(S)}

=\dfrac{10}{21}\approx0.476

Hence, the required probability =0.476

7 0
3 years ago
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