How to solve (x+7)(x-9)>0

Answers

Answer 1

Answer:

x < -7, x > 9.

Step-by-step explanation:

Solve for x.

x = -7, 9

From the values of x above, we have these 3 intervals to test.

[tex]x < - 7[/tex]

[tex] - 7 <x < 9[/tex]

[tex]x > 9[/tex]

Pick a test point for each interval.

For the interval x < −7:

Let's pick x=−8. Then, (-8 + 7) (-8 - 9) > 0.

After simplifying, we get 17>0, which is true

Keep this interval.

Let's pick x=0. Then, (0+7)(0-9) > 0.

After simplifying, we get −63 > 0, which is false.

Drop this interval.

For the interval x > 9:

Let's pick x=10. Then, (10+7)(10-9)>0.

After simplifying, we get 17 > 0, which is true

Keep this interval.

Therefor, the answer is x < -7, x > 9.


Related Questions

Zeke and Scarlett deposit $500.00 into a savings account which earns 5% interest
compounded annually. They want to use the money in the account to go on a trip in 3 years.
How much will they be able to spend?
= P 1 + , where A is the balance (final amount), P is the principal
(starting amount), r is the interest rate expressed as a decimal, n is the number of times per
year that the interest is compounded, and t is the time in years.

Answers

Answer:

578.81

Step-by-step explanation:

PV(1+i)ⁿ

500(1+.05)³

578.8125

which rounds to 578.81

PLEASE ANSWER ASAP!!!The grid you see below is in the shape of a rectangle. What is the area, in square units, of the shaded part?

Answers

Answer:

I think it’s 12 sorry if I’m wrong!

200% of d is 18. what is it

Answers

Answer:

36 is d

Step-by-step explanation:

Please help very urgent

Answers

Answer:

330 degrees

Step-by-step explanation:

look at 4th quadrant of unit circle

(cos,sin)

(sqrt3/2,-1/2)=330

PLEASE HELP ASAP, THANK YOU!

Answers

Answer:

Option (1)

Step-by-step explanation:

Exponential equation that models the increase in the number of books has been given as,

[tex]B=8700e^{0.04t}[/tex]

Here, B = Number of books

t = Number of years

Number of books after t = 3,

[tex]B=8700\times e^{0.04\times 3}[/tex]

   [tex]=8700\times e^{0.12}[/tex]

   = 9809.226

   ≈ 9809

Therefore, Option (1) will be the correct option.

Answer:

After 3 years, the library will have approximately 9,809 books.

Step-by-step explanation:

If [tex]t[/tex] represents the number of years passed, in the time of 3 years, the library shall have [tex]8700e^{0.04*3} = 8700e^{0.12}[/tex] ≈ [tex]8700*1.12749[/tex] ≈ [tex]9,809[/tex] books.

Find the area of the triangle

Answers

Answer:

[tex] \frac{4 \times 5}{2} = 10[/tex]

Nancy and brad each found an old Singh at a yard sale . Which sing has a greater area

Answers

Answer:

Ask the full question please it can't be understood

2.) What is the value of 7b + 6 when b = 4?*
OA) 34
O B) 46
O C) 53
OD) 80

Answers

7b + 6

7(4) + 6

28 + 6 = 34

A) 34

Answer:

Answer is A.

Step-by-step explanation:

7b+6 is the question so you replace the b in 7b+6 and multiply 7 times 4 which makes 28 then you do 28+6= 34

WILL GIVE BRAINLIEST PLEASE HELP WITHIN 15 MINUTES!!

The difference between 1/2 of one number and 2/3 of another number is equal to 2. If the first number were to decrease by 5/6 of it, and the second number were to increase by 1/6 of it, their sum would be equal to 59. Find the two numbers.

Answers

Answer:

60 & 42

Step-by-step explanation:

Just know it.

Good Luck!!

Ques- Explain the concept of maximum value function.​

Answers

Maximum means upper bound or largest possible quantity. The absolute maximum of a function is the largest number contained in the range of the function. That is, if f(a) is greater than or equal to f(x), for all x in the domain of the function, then f(a) is the absolute maximum. For example, the function f(x) = -16x2 + 32x + 6 has a maximum value of 22 occurring at x = 1. Every value of x produces a value of the function that is less than or equal to 22, hence, 22 is an absolute maximum. In terms of its graph, the absolute maximum of a function is the value of the function that corresponds to the highest point on the graph.

Read more: Maxima and Minima - Applications - Function, Maximum, Minimum, and Value - JRank Articles https://science.jrank.org/pages/4186/Maxima-Minima.html#:~:text=The%20terms%20maxima%20and%20minima%20refer%20to%20extreme,number%20contained%20in%20the%20range%20of%20the%20function.#ixzz6ro3tVTku

Bailey makes a conjecture that the product of two odd integers is always an odd integer. Which choice is the best proof of her conjecture

Answers

Answer:

D.

Step-by-step explanation:

Let (2a+1) be an odd number, and let (2b+1) be another odd number. The product 2(2ab+a+b)+1 is a multiple of 2 plus 1, which is an odd number.

Using a reciprocal for [tex]3\frac{3}{4}[/tex] what is [tex]8\frac{1}{5}[/tex]÷[tex]3\frac{3}{4}[/tex]

Answers

Answer:

123/4

Step-by-step explanation:

3 3/4=15/4

Reciprocal of 15/4=-4/15

8 1/5 / 3 3/4

=41/5 / 15/4

= 123/4

I didn’t get the first part of the question that well but this is the answer for the question

If someone knows the answer please help . Lots of points !

Answers

Answer:

Step-by-step explanation:

Given function is,

f(x) = -4(x - 3)² + 1

A). Negative sign of the coefficient (-4) tells that the parabola opens downwards.

    And 4 represents that the parent function is stretched vertically by 4 units.

B). By comparing this equation with the vertex form of the quadratic function,

    f(x) = a(x - h)² + k  

    Here, (h, k) is the vertex of parabola.

    Vertex of the given parabola → (3, 1)

C). Axis of symmetry → x = 3

D). Domain of the given quadratic function → (-∞, ∞)

     Range of the given function → (-∞, 1)

What is the difference of the rational expressions below? 4x/x-3 - 5/x.

Answer: 4x^2-5x-15/x(x-3)

Answers

Answer:

Thank you for putting the answer there for people to see :)

Is this the right answer?,please help before I turn it in

Answers

Yes it’s the right answer, I just did it myself and I got -4

!! i don’t understand:(!!Frank estimated the height of his office building to be 35 ft. The actual height of his office building is 33 ft.
Find the absolute error and the percent error of Frank's estimate. If necessary, round your answers to the nearest tenth

absolute error : _ ft
percent error : _ %

Answers

Answer:

See explaination and answer below

Step-by-step explanation:

Absolute Error:

ae = | E - A |

ae = | 35ft - 33ft|

ae = 2 ft

Percent Error:

pe = 100% * | E - A | / A

pe = 100% * | 35ft - 33ft | / 33ft

pe = 6.06% error

EDIT: 6.1% if asked to the nearest tenth.

Please mark brainliest if this helped!

Please mark brainliest if this helped!

What is the median of the data set shown?34, 86, 12, 56, 21, 98, 72, 34, 21, 34, 45, 23, 97, 44

Answers

Answer: The median of the data is 34

Step-by-step explanation: the reason why it is 34 is because when your dealing with medians you want to put down the number that you see the most of for example you see 34 three times so the number you see the most is 34 so the answer is 34

/forms/d/e/1FAIpQLSed EhBHljwHakF6vZWŁYYZG6BSihvt7EL1HPBZJYDL_IP9-Jw/formResponse
15. Compare the two box plots below. Which of the following statements is 1 point
NOT true?
CLASS B
CLASS A
0 1 2 3 4 5
NUMBER OF SIBLINGS
A. The interquartile range of both Class A and Class B is approximately two.
B. The median number of siblings in Class B is approximately 2.5.
C. Both Class A and Class B have students who are only children.
D. Over half of the students in Class A have two or more siblings.

Answers

Answer:

A

Step-by-step explanation:

Im not sure if the answer is correct tho

Answer:666666

Step-by-step explanation add and delete

Rick wishes to purchase a new car and can afford monthly payments of up to $275
per month. Finance is available and the terms are that the loan lasts for 6 years, and
the annual interest rate is 8%. What is the maximum price for at car that Ryan's
budget can afford?
Round your answer to the nearest hundred dollars.
I need help!!

Answers

Answer:

200?

Step-by-step explanation:

-6+7x=29 solve for x

Answers

Answer:

x=5

Step-by-step explanation:

add 6 to both sides

7x=35

divide by 7

x=5

Answer:

X=5

Step-by-step explanation:

-6+7= 1

7x5=35

-6+ 7(5)=29

Maria bought apples(a) for $2.32 per pound and bananas(b) for $1.65. She spends $31.42. Write the equation for this situation.

Answers

Answer:

$31.42-(2.32+1.65)

Step-by-step explanation:

In mathematics, an equation is a statement that asserts the equality of two expressions, which are connected by the equals sign "=". The word equation and its cognates in other languages may have subtly different meanings; for example, while in English, any equality is an equation. Solving an equation containing variables consists of determining which values of the variables make the equality true.

Find the value of x 117,145,133,140,119,125

Answers

Answer:

here u go hope this is right

Step-by-step explanation:

x + 779 = 900

x = 900- 779

x = 121

Someone please help me with this , open the picture

Answers

Answer:

All this is asking you to do is to create a sketch of the newly cropped pyrmid and asking you to describe the new changements. (Answer Varies)

Step-by-step explanation:

Terrell got 1 3/4 pounds of ground meat and 2 1/6 of ground chicken. he used 1 2/3 pounds of ground chicken to make a casserole. how much ground chicken did he have left?​

Answers

Answer:

Okay so we have to solve this in separate parts. Like so, its wiill go like this: 2+ 1/6 - 1 - 2/3. So we see that we have 2 and 1 as whole. Subtract 2 - 1 is 1 right. Now for fractional part 1/6 - 2/3. Since its uneven, we have to find the LCD which is 6. This forms of our fractions into 1/6- 4/6. 1/6 - 4/6 is 3/6. simplify it would result in 1/2.  The amount of ground chicken that Terrell has left is 1/2.

1.Write the expression in expanded form. The subscript number can be write in
normal form. E.g. X1 + X1Y1, do not forget the correct parenthesis and the correct
order. *



2.For the equation in above evaluate the notation using the values below. Please
enter the exact value.
X1 =0
Y1 = 5
Z1 = 0
X2 = 1
Y2 = 26
Z2 = -2
X3 = 12
Y3 = -2
Z3 = 3
X4 = -1
Y4 = 25
Z4 = 24​

Answers

Answer:

(a) Expanded form:

[tex]((X_1 + X_1Y_1) - X_1Z_1) + ((X_2 + X_2Y_2) - X_2Z_2) + ((X_3 + X_3Y_3) - X_3Z_3) + ((X_4 + X_4Y_4) - X_4Z_4)[/tex]

(b) The value of the expression: -21

Step-by-step explanation:

Given

[tex]\sum \limit^4_{i=1}\ ((X_i+X_iY_i) - X_iZ_i)[/tex]

Solving (a): The expanded form:

This means that we substitute the values of i from 1 to 4 in the above expression.

So, the expression becomes:

[tex]((X_1 + X_1Y_1) - X_1Z_1) + ((X_2 + X_2Y_2) - X_2Z_2) + ((X_3 + X_3Y_3) - X_3Z_3) + ((X_4 + X_4Y_4) - X_4Z_4)[/tex]

Solving (b): The value of the expression

To do this, we simply substitute the given values of X1, X2....... in the expression.

This gives:

So, the expression becomes:

[tex]((0 + 0*5) - 0*0) + ((1 + 1*26) - 1*-2) + ((12 + 12*-2) - 12*3) + ((-1 + -1*25) - -1*24)[/tex]

Simplify each bracket

[tex]((0 + 0) - 0) + ((1 + 26) +2) + ((12 -24) - 36) + ((-1 -25) +24)[/tex]

[tex]0 + 29 -48 -2[/tex]

[tex]-21[/tex]

Hence, the result of the expression is -21

Which amounts form part of the total cost of a mortgage?

A. monthly interest, and mortgage tax

B. closing cost, and starting deposits

C. closing costs, and monthly loan payments

Answers

Answer:

C

Step-by-step explanation:

Answer:

C. Closing cost, and monthly loan payments

Step-by-step explanation:

1
Find the area of a trapezoid with ba = 3 cm, b2 = 22 cm, and h = 6 cm.
150 cm2
9 cm2
75 cm2
66 cm2

Answers

Answer:

Step-by-step explanation:

75cm^2

a+b/2 times h = area

Select all statement that are true for the figure bellow plz

Answers

Answer:

oh I can't really see the image

help pleasee
look in the photo

Answers

Answer: c

Step-by-step explanation:

Because group B has Pharrell lines

What is the price of 0.75 m of fabric if the meter costs 31,500

Answers

Look up what is 75% of 31,500
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