Evaluate the algebraic expression x^2 - 20 for x = 7 and for x = 9

Answers

Answer 1

Answer:

29

61

Step-by-step explanation:

x^2 - 20

x = 7 and 9

Evaluate

___________

We know the values of x, let's substitute them with the x in the problem :

(7)^2 - 20

49 - 20

29

(9)^2 - 20

81 - 20

61


Related Questions

3(2c + 5) = 39
What is the answer ?

Answers

Answer:

c=1

Step-by-step explanation:

Simplifying

3 + 2c = 5

Solving

3 + 2c = 5

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '-3' to each side of the equation.

3 + -3 + 2c = 5 + -3

Combine like terms: 3 + -3 = 0

0 + 2c = 5 + -3

2c = 5 + -3

Combine like terms: 5 + -3 = 2

2c = 2

Divide each side by '2'.

c = 1

Simplifying

c = 1

Answer:

 =  4

Step-by-step explanation:

Subtract  15 from both sides of the equation

6+15=39

6+15−15=39 − 5

Simplify

6=24

Divide both sides of the equation by the same term

(6=24)/6

Simplify

=4

49 ÷ 7 =
6 × 6 =
38 - 21 =
99 - 63 =
43 + 54 =
55 ÷ 5 =
87 - 44 =
94 - 63 =
144 ÷ 12 =
56 - 24 =
65 - 23 =
27 ÷ 3 =
47 + 31 =
52 + 46 =
70 ÷ 7 =
72 ÷ 9 =
98 - 22 =
42 + 17 =
64 ÷ 8 =
42 + 33 =

Answers

Answer:

use pemdas

Step-by-step explanation:

Answer:

7

32

17

36

97

11

43

31

12

32

42

9

78

98

10

8

76

59

8

75

Step-by-step explanation:

going straight down from the top

P(x)=x4-52+9x+8 Hallar p(-3)

Answers

Answer:

P(x)=x⁴+9x-44

Step-by-step explanation:

1. What is the Greatest Common Factor of 8 and 36? (1 point)
-2
-4
-6
-8​

Answers

Answer:

4 is the answer no hate if I'm wrong :)

Answer

GCF of 8 and 36 is 8

CORRECT ANSWER Is 4 SORRY FOR THE MESS UP

Angles 1 and 2 are supplementary. If angle 1 measures (2x +2)°, and angle 2 measures (x - 5)° what is the measure of each angle?

Answers

Answer:

angle 1 is = 124 angle 2 is = 56

Step-by-step explanation:

supplementary angles always add up to 180 so you can set up the equation (2x+2)+(x-5)=180 to find x. After solving you get x = 61 and then once you have x you plug it into the 2 equations you got for the angles to solve for 1 and 2.

A book sold 31,600 copies in its first moth of release. Suppose the represents. 6.6% of the number of copies sold to date. How many copies have been sold to round your answer to the nearest whole number.

Answers

Answer:

Step-by-step explanation: dont know

i need help on number 1​

Answers

in the equation, y=2x-4, slope is 2 and the y-intercept is -4. since your slope is a positive 2, your graph will be positive. hope i helped.

Explain why square root of -2 is equal to i square root 2

Answers

Answer:

Because square roots aren't really negative. if you multiplied square roots by themselves they can equal positive and negative

Step-by-step explanation:

A cylinder has a base diameter of 20in and a height of 17in. What is its volume in cubic in, to the nearest tenths place?

Answers

Step-by-step explanation:

(3.1415 * 10^2) area of base

(17) height

volume = area of base * height

volume = 3.1415 * 10^2 * 17

The volume of the cylinder is 533.8 cubic inches to the nearest tenths place

Volume of Cylinder based problem:

What information do we have?

Diameter of cylinder = 20 inch

Height of cylinder = 17 inch

Volume of Cylinder = πr²h

Volume of Cylinder = (3.14)(20/2)²(17)

Volume of Cylinder = (3.14)(10)(17)

Find out more information about 'Cylinder'.

https://brainly.com/question/3216899?referrer=searchResults

Simplify.
4(u-2) - 6

Answers

Answer:

The answer is 4u-14.

Have a great rest of your day!

Answer:

4(u-2) - 6

separate bracket

4u-8-6

4u-14

Jane was playing a game with her sister, Sally. Jane was down by 7. After her next turn, she was down by 3. Which of the following mathematical statements represents this scenario?

A. - 7 + -3 = -10
B.
- 7 + 3 = - 4
C. - 7+ 4 = - 3
D. - 7 + - 4 = - 11

Answers

Answer:

A. -7 + -3 = -10

Step-by-step explanation:

Jane went down by 7, so -7. Then, she went down by 3, so -7 + -3.

-7 + -3 = -10

Hope this helped! <)

(Sorry if this is wrong!)

Write an equivalent expression.
- 2(5 + 6g)
Choose the correct answer below.
A. -2(5+6g) = 6g - 10
B. -2(5.+6g) = -2- 12g
C. -2(5+6g) = - 10 - 129
D. -2(5+6g) = -10 +6g

Answers

Answer:

answer+> D. -2(5+6g) = -10 +6g

Subject:Mathematics ​

Answers

Answer:

x=28°

Step-by-step explanation:

2x+3x-10+50=180

5x+40=180

5x=180-40

5x=140

x=140/5

x=28°

Question :

The angle measure of a triangle are shown in the diagram.

What is the value of x?

Answer :

value of x is 28°

Explanation :

Given :

∠A = 50°∠B = (2x)°∠C = (3x - 10)°

To Find :

Value of x = ?

Solution :

As, In a triangle measure of all three angles is always 180°.

[tex] \sf : \implies \angle A + \angle B + \angle C = 180\degree[/tex]

[tex] \sf : \implies 50\degree + (2x)\degree + (3x - 10)\degree = 180\degree[/tex]

[tex] \sf : \implies 50 + 2x + 3x - 10 = 180\degree[/tex]

[tex] \sf : \implies 40 + 5x = 180\degree[/tex]

[tex] \sf : \implies 5x = 180\degree - 40\degree[/tex]

[tex] \sf : \implies 5x = 140\degree[/tex]

[tex] \sf : \implies x = \cancel{\dfrac{140\degree}{5}}[/tex]

[tex] \sf : \implies x = 28\degree[/tex]

[tex] \large \underline{\boxed{\bf{x = 28\degree}}}[/tex]

Hence, value of x is 28°.


Evaluate the expression x
x(2 – 5y)²
when x= = -5 and y=-3.

Answers

[tex]\displaystyle -5(2-5(-3))^2=-5(17)^2=-1445[/tex]

Help plsssd Help pldddd

Answers

ok the first one

and this is the second one

A 2 pack of plastic flower pots costs $1.58. What is the unit price?

Answers

$0.79

Explanation:
1.58/2= 0.79
.79 Cent . They have 2 for $1.58 soo $1.58 divided by 2 is .79 .

Help me ??????????????????

Answers

Answer:

A

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

(h, k) are the coordinates of the vertex and a is a multiplier

Given

f(x) = - 2x² - 12x - 16

To complete the square the coefficient of the x² term must be 1

Factor out - 2 from - 2x² - 12x

f(x) = - 2(x² + 6x) - 16

add/ subtract ( half the coefficient of the x- term )² to x² + 6x

f(x) = - 2(x² + 2(3)x + 9 - 9 ) - 16

     = - 2(x + 3)² + 18 - 16

     = - 2(x + 3)² + 2 ; y = 2

Which conic section is represented by the following equation?

5x^2 – x + 5y^2 – 3y + 4 = 0

circle
ellipse
parabola
hyperbola

Answers

Answer:

3 rd one

Step-by-step explanation:

The conic section represented by the given equation is Circle.

What is Circle?

Circle is a two dimensional figure which consist of set of all the points which are at equal distance from a point which is fixed called the center of the circle.

Standard form of a circle is,

(x - h)² + (y - k)² = r²

where, (h, k) is the center of the circle and r is the radius of the circle.

Expanding, we get,

x² - 2hx + h² + y² - 2ky + k² = r²

x² - 2hx + y² - 2ky + (h² + k² - r²) = 0

The given equation is,

5x² – x + 5y² – 3y + 4 = 0

This is same as the standard form of the circle.

Hence the given equation is that of a circle.

Learn more about Circles here :

https://brainly.com/question/13658927

#SPJ2

what i 5 + 5
ok
ok
ko

Answers

Answer:

haha The answer is 10!(::

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

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How do you add fractions and whole numbers together? For example 1/4+2

Answers

Answer:

2.25 or 2 1/4

Step-by-step explanation:

Easy. you add them like regular numbers. 1/4 + 2 = 0.25 + 2 =2.25 and/or 2 1/4

calebs gross income last year was $39,000. he deducted $1,200 for charitable donations and tax-free interest payments and was taxed $2,200. what was his tax rate?

a. 19%
b. 12.6%
c. 28.8%
d. 5.8%

Answers

Answer:

28.8

Step-by-step explanation:

the power of G00GLE

A lioness gave birth to 3 cubs. The cubs weighed 3 3/8 pounds, 3 1 /3 pounds, and 2 3/4 pounds. What was the total weight of the cubs?

Answers

Answer:

b

Step-by-step explanation:

The total weight is 9 11/24 pounds

Y = 4( x + 2)^2 - 8


Convert the equation from vertex form to standard form.

Answers

i believe the answer is y=4x^2+16x+8

Answer:

hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Victoria and Javier are collecting aluminum for a community service project. Victoria previously collected 56 pounds and is collecting at a rate of 8 pounds per hour this weekend. Javier collected 16 pounds earlier and Is now collecting at a rate of 12 pounds per hour. How many hours must pass (x) before the two students have collected the same amount of aluminum (y)?​

Answers

Answer:

10 hours

Step-by-step explanation:

Victoria collects:

8x + 56

Javier collects:

12x + 16

They get same amount:

8x + 56 = 12x + 1612x - 8x = 56 - 164x = 40x = 10

Aniyah has 12.9 pounds of pretzels. She puts the pretzels into bags that each hold 0.3 pounds. How many bags does Aniyah need to use to evenly distribute the pretzels?

Answers

Answer:

43 Bags

Step-by-step explanation:

12.9 divided by 0.3 equals 43 and 43 multiplied by 0.3 is 12.9.

Owen simplified the expression r-8 s-5.


r−8s−5 =
1
r8
⋅ s5 =
s5
r8

Describe Owen’s error.

Answers

ok sweetheart so basicaly what u do is...

Sample Response: Each base must be treated separately. Since each base is raised to a negative exponent, they should both be in the denominator of the fractions. The simplified form of the expression has 1 in the numerator and r to the 8th power times s to the 5th power in the denominator

Answer:

This is what it says to include in your response..." Each base has a negative exponent" and "Both powers should be in the denominator".

Step-by-step explanation:

This is the Exact sample response,

Each base must be treated separately. Since each base is raised to a negative exponent, they should both be in the denominator of the fractions. The simplified form of the expression has 1 in the numerator and r to the 8th power times s to the 5th power in the denominator.

What is the value of 6 2/3 + 1 7/12?

Answers

Answer:

Im not sure but i think the answer is 7 9/15

Step-by-step explanation:

Answer:

8.25 or 8 1/4

Step-by-step explanation:

sum of the fractions as a mixed numbers

2 5/6 + 4 3/6 =​

Answers

7 and 1/3 hope this helps

**hint** Find the hypotenuse and then subtract that from the distance he actually traveled.

Answers

Answer:

10 miles

Step-by-step explanation:

A flagpole and a model flag pole have a scale factor of 1 in.= 4 ft. If the model pole measures 12 inches, how tall is the actual pole?

Answers

Answer:

[tex]48\ \text{feet}[/tex]

Step-by-step explanation:

[tex]1\ \text{inch}[/tex] of the model is [tex]4\ \text{feet}[/tex] of the actual pole.

Here, the pole which is present in the model measures [tex]12\ \text{inches}[/tex], so

[tex]12\ \text{inches}[/tex] of the model will be [tex](12\times 4)\ \text{feet}=48\ \text{feet}[/tex]

Hence, the actual pole will be [tex]\boldsymbol{48\ \text{feet}}[/tex] tall.

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