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Crazy boy [7]
2 years ago
11

Please answer, i dont understand this question. Please show work for extra points

Mathematics
2 answers:
Sunny_sXe [5.5K]2 years ago
5 0

Answer:

D)  x=\frac{5}{3} and x=-4

Step-by-step explanation:

<u>Factor by grouping</u>

3x^2+7x-20=0\\\\3x^2+12x-5x-20=0\\\\3x(x+4)-5(x+4)=0\\\\(3x-5)(x+4)=0

<u>Solve each factor using the Zero Product Property</u>

3x-5=0\\\\3x=5\\\\x=\frac{5}{3}

x+4=0\\\\x=-4

Thus, x=\frac{5}{3} and x=-4 are the solutions

Mumz [18]2 years ago
4 0
The answer is D as you can see in the picture

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Harlene tosses two number cubes. If a sum of 8 or 12 comes up, she gets 9 points. If not, she loses 2 points. What is the expect
Amanda [17]
P(8 or 12) = 1/6
P(not 8 or 12 = 5/6
Let the expected points fro one roll be X.
E(X)=9\times\frac{1}{6}-2\times\frac{5}{6}=-\frac{1}{6}\ points
The answer is -(1/6) points.
5 0
3 years ago
Read 2 more answers
Meera is a high school student who is going to work two jobs this summer
lilavasa [31]

Answer:

good for Meera

Step-by-step explanation:

but what is the question?????

5 0
4 years ago
HURRY!!! Which inequality has –12 in its solution set? A B C D x + 6 less-than negative 8 x + 4 greater-than-or-equal-to negativ
frozen [14]

Answer:

<u>The correct answer is D.  x + 5≤ - 4</u>

Step-by-step explanation:

Let's review which inequality has - 12 in its solution set, this way:

A. x + 6 less-than negative 8

-12 + 6 < - 8

-6 < - 8 Not correct

B. x + 4 greater-than-or-equal-to negative 6

- 12 + 4 ≥ - 6

- 8  ≥ - 6 Not correct

C. x minus 3 greater-than negative 10

- 12 - 3 > - 10

<u>- 15 > - 10 Not correct</u>

D. x + 5 less-than-or-equal-to negative 4

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<u>The correct answer is D.  x + 5≤ - 4</u>

4 0
3 years ago
Read 2 more answers
The students in the fourth and fifth grades are going to a concert. There are 178 students. Each row has 8 seats. The fifth grad
nexus9112 [7]

Answer:


Step-by-step explanation:  So there are 148 students total and we know the fifth graders filled up 12 rows and since each row has a number of 8 seats we should multiply 8 times 12, which is equal to 96. Now in order to find the number of rows needed for the fourth graders we should first, subtract 178 minus 96; that is equal to 82. Next, we should divide 82 by the number of seats in each row since what we are trying to find id the number of rows needed for the fourth graders. So, we should divide 82 by 8 which is equal to 10. 25.

The number of rows needed is 11 since all students need to have a seat; the answer cannot be 10 because that means a few students would not have a seat.



8 0
3 years ago
Help help help!!!!!!!!!!
liq [111]

Answer:

<h2>z = 6</h2>

Step-by-step explanation:

4(z+1)=2(z-1)+18\qquad\text{use the distributive property}\\\\(4)(z)+(4)(1)=(2)(z)+(2)(-1)+18\\\\4z+4=2z-2+18\qquad\text{subtract 4 and}\ 2z\ \text{from both sides}\\\\4z-2z+4-4=2z-2z-2+18-4\qquad\text{combine like terms}\\\\2z=12\qquad\text{divide both sides by 2}\\\\z=6

3 0
3 years ago
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