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lozanna [386]
3 years ago
8

What point is a solution to the inequality shown in this graph? (-3,-6) & (3,2)

Mathematics
1 answer:
NARA [144]3 years ago
7 0

Answer:

(0,5)

Step-by-step explanation:

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Brian needs to find the value of a number, a, so that when (x^2+3x) is added to the binomial (3x^2+ax), the sum simplifies to 4x
Julli [10]

Answer:

a = 9

Step-by-step explanation:

First we need to add  (x^2+3x)  to (3x^2+ax),

(x^2+3x)+(3x^2+ax)

Expand

= x^2+3x+3x^2+ax

Collect the like terms

= x^2+3x^2+3x+ax

= 4x^2 + 3x + ax

= 4x^2+(3+a)x

Equate the solution to 4x^2+12x

4x^2+(3+a)x = 4x^2+12x

Comparing the like terms on both sides

(3+a)x =12x

3 + a = 12

a = 12 - 3

a = 9

Hence the value of a is 9

6 0
3 years ago
I need help simplifying this expression<br><br> 9•(7-4)^2+9
marshall27 [118]

Answer:

90

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Can anybody help me please
Mumz [18]

(_ , _) means (X , Y)

(25 , ) means

X = 25 then you need find the value of Y from the equation .

y =  \frac{1}{5} x - 8 \\ y =  (\frac{1}{5}  \times 25) - 8 \\ y = 5 - 8 =  - 3

so the first answer is (25,-3)

..............

( , -8) means

Y = -8 then you need to find the value of X from the equation .

y =  \frac{1}{5} x - 8 \\  - 8 =  \frac{1}{5} x - 8 \\ 0 =  \frac{1}{5} x \\ x = 0

so the second answer is ( 0 , -8 )

hope this would help you

3 0
3 years ago
????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
tigry1 [53]

Answer:

C) 4

Step-by-step explanation:

Replace the variable a with 4 to see if it makes the equation true.

4 + (-7) + 3 = -3 +3

-3 + 3 = 0; thererfore, the number 4 is the proper solution to the equation.

4 0
3 years ago
Suppose that your statistics professor tells you that the scores on a midterm exam were approximately
DedPeter [7]

Answer:

  • Yes

Step-by-step explanation:

z-score representing 85% is 1.04 (from table)

Let x be the score representing the lower limit of 85%.

<u>Use the formula to find z-scores:</u>

  • z = (x - μ)/σ

<u>We have:</u>

  • z = 1.04, μ = 78, σ = 7

<u>Substitute the values and solve for x:</u>

  • 1.04 = (x - 78)/7
  • x - 78 = 7.28
  • x = 85.28

The lower limit of the top 15% is 85.28.

Since your score is greater than 85.28 you earned an A

5 0
3 years ago
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