Mathematics High School

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

2. f(x) = (x -2)^2 +4

Answers

Is this a real question because i dont think this exist unless u are some type of genius

1. If you wish to calculate the interest on an investment with an interest rate
of 2.85%, what number will you plug into your equation?"
0.00285
2.85
0.285
ОО
0.0285

Answers

Answer:  Choice D)  0.0285

=========================================

Explanation:

You move the decimal point two spots to the left to go from 2.85% to 0.0285

Or you can think of it like this:

2.85% = (2.85)/100 = 0.0285

since "percent" means "per 100"

Need help! Please solve my age problem!

Answers

Answer:

he's 12 years old

Step-by-step explanation:

12x2=24 <-- mothers age

12+12=24 <-- 12 year later child age

so the child is 24 and the mother is 36

Please rate this question :) thanks

Please help due today

Answers

Answer:

The event is unlikely.

Step-by-step explanation:

Probabilities under 50% (0.50) are considered unlikely.

These problems are called exponents or something. I just want to make sure I got it right and please solve it.

Answers

Answer:

you have all of them right just make sure for number six you have 1/3125. you have all the work im not sure what i should solve.

you have all of them right

3. The width of a rectangle is 3x – 7. The length of the rectangle is 4x +5.
Find the perimeter of the rectangle.
A. 4x - 14
B. 6x - 14
C. 8x + 10
D. 14x - 4
PLEASSSSEEE

Answers

Answer:

D. 14x - 4

Step-by-step explanation:

P = 2(L + W)

P = 2(4x + 5 + 3x - 7)

P = 2(7x - 2)

P = 14x - 4

14y-14->14 what is the solution to the inequality

Answers

Answer:

if you see this say hi pls

Step-by-step explanation:

Answer:

y > 2

Step-by-step explanation:

Given

14y - 14 > 14 ( add 14 to both sides )

14y > 28 ( divide both sides by 14 )

y > 2

John leaves his home. He travels 5 blocks south and three blocks west. As the crow flies, how far is John from his home?

Answers

Answer:

5.83 blocks away from his home

Step-by-step explanation:

If he travels 5 blocks south and 3 blocks west, the distance from his house considered along with the distances travelled gives a right angled triangle whose opposite side and adjacent sides are the distances travelled north and west.

The distance from his house after moving 3 blocks west is the hypotenuse side. As such, the distance may be computed using Pythagoras' theorem. Let the distance from his house be G

G^2 = 5^2 + 3^2

G^2 = 25 + 9

= 34

G = √34

=5.83

John is 5.83 blocks away from his home

In a bag of marbles, image are red, image are blue, image are green, and image are yellow. You pick a marble without looking. What color marble are you MOST likely to choose?

A.
blue

B.
red

C.
yellow

D.
green

Answers

It will be blue I say lol
Well, I’m not sure. There is no amount for each marble. So realistically you could just guess any of them.
Making a guesstimate isn’t a thing either because you need amounts for that as well.

Diego want to paint his room purple. He bought one gallon of purple paint that is 30% red paints and 70% blue paints. Diego wants to add more blue to mix that the paint mixture is 20% red, 80% blue.

How much blue paint should Diego add? Test the following possibilities: 0.2 gallons, 0.3 gallons

Answers

Answer:

10 gallons

Step-by-step explanation:

henry subracts 16 from it and gets an answer of 13.9 what was the orginal number​

Answers

Answer:

29.9 is the answer for that question

Answer:

the original number would have been 29.9

Step-by-step explanation:

13.9+16=29.9

Which numbers are less than –83? Select all that apply.

Answers

Step-by-step explanation:

there aren't any answer choices but on the number line it is anything to the left of -83

Answer:

You didn't provide the answers, but I can still help you :)

Step-by-step explanation:

____________________________________________________________

    anything back here will be correct :)                        -83

HELP!!! Round your answer to the nearest hundredth.
А
?
6
С
B
4

Answers

Answer:

41.81

Step-by-step explanation:

sinus-1 formula

opp/hyp

4/6

Whats 7 rounded to one decimal place?

Answers

The correct answer is 7or .7

Which of these represents the expression "7 less than twice x"? O 7-2x O 2X-7 O 7 < 7 < 2x O 2x​

Answers

Answer:

the answer for this question is 7-2x

what is the step by step equation for −4+12=−4?
thanks!

Answers

Answer:

the actually answer is -8

Step-by-step explanation:

No solution to solve this answer it’s false

PLEASE HELP GIVING BRAINLIEST TO CORRECT ANSWER! 10 POINTS

Janile got 4 kilograms of candy when she went trick-or-treating at Halloween. Since she didn’t want to eat it all, she decided to share it with her 4 friends. If the 5 of them share the 4 kilograms, how much will each of them have?

Answers: (Show explanation)

15,000 tons

150 tons

18,750 tons

600,000,000 tons

Answers

Answer:

it 15,000

Step-by-step explanation:

I hope it work

Using the given diagram, solve for x.

Answers

Answer:

x is the hypotenuse so you will take a

Mario is 4 feet 9 inches tall. What is his approximate height in centimeters? (1 in. ≈ 2.54 cm)

Answers

Answer:

144.78cm

Step-by-step explanation:

4ft 9in is 57 inches

so 57x2.54 is 144.78

Answer:

Mario is 12.446 cm

Step-by-step explanation:

im begging yall please help me!please?

Question-Susan works for the school newspaper and wants to conduct a survey to ask students whom they will vote for in the upcoming School actions which example should she choose to best represent the entire population ?

Answers

B- asking every tenth student has an advantage of asking more people

I will mark you brainiest if you can answer this

Answers

Answer:

x = -6

Step-by-step explanation:

4x - 2 + 3x - 7 = -51

Simplify

7x - 9 = -51

Move Terms

7x = -42

Divide.

x = -6

good luck, i hope this helps :)

Answer:

-6

Step-by-step explanation:

4x-2+3x-7=-51

we take minus two to the other side and it becomes plus two and -51+2 is -49

4x+3x-7=-49

and we take minus seven to the other side it becomes plus seven and -49+7 iis -42

4x+3x=-42

4x+3X = 7x

7x = -42

and to remove the x we divide both sides by 7

x = -42/7

-42/7 = -6

x=-6

Which equation has the slope of 3? A. y=3 B.y=x+3 C. y=3-x D. y=3x-1

Answers

d.) y=3x-1. is the answer

Please help due today

Answers

it’s more likely that warren picks a shirt as there’s more shirts than pants. hope this helps!!

What is the value of p?

Answers

the answer is p=6

hope that helped loll

Answer: 6

Step-by-step explanation:

In a triangle, all three angles always add to 180°.

Thus, simply do 180 - 96 - 54 to get the angle, 30.  Then, because the angle is 5p, divide 30/5 = 6.

Hope it helps <3 :D

6^8 x 6^3 = 6^5 x 6^x
Find the value of x..... Can you help me

Answers

Answer:

x=6

Step-by-step explanation:

the solution is 6

explanation/steps shown in the picture

EASY 7TH GRADE MATH 6 out of 8 dentists recommend crest. In a group of 156 dentists, how many of them recommend crest?

Answers

Answer:

117

Step-by-step explanation:

6/8   x/156 so 156/8=19.5*6=117

-4x+y=3 and 2x-y=12. which of the options represents the resulting equation after an equivalent expression for yw is substituted into the second equation. Odessyware!

Answers

Answer:

2x - (3 + 4x) = 12

x = -7.5

y = -27

Step-by-step explanation:

-4x + y = 3 (1)

2x - y = 12 (2)

From (1)

y = 3 + 4x

Substitute y = 3 + 4x into (2)

2x - y = 12 (2)

2x - (3 + 4x) = 12

2x - 3 - 4x = 12

2x - 4x = 12 + 3

-2x = 15

x = 15/-2

x = -7.5

Substitute x = -7.5 into (2)

2x - y = 12 (2)

2(-7.5) - y = 12

-15 - y = 12

-y = 12 + 15

- y = 27

y = -27

teri ran 4 kilometers . one mile is approximately equal to 1.6 kilometers. how many miles did teri run
​

Answers

Answer:

2.5 Miles

Step-by-step explanation:

4 k = ? Mile

1.6 k = 1 mi

4/1.6 is 2.5

1x2.5 equals 2.5

so 4 km should be 2.5 mi

4 k = 2.5 Mile

(x2.5)1.6 k = (x2.5)1 mi

Someone help please and make sure it’s right please :)

Answers

I'm going to go with 4 I hope I'm right if it's wrong I'm sorry

Bobby is 5 less than Kylie's age. Their combined
age is 43. How old is Kylie?

Answers

Answer:

Kylie is 24 years old

Step-by-step explanation:

kylie = x

Bobby=x-5

x+x-5=43

2x-5=43

2x=43+5

2x=48

X=24 years old

19

If you subtract 5 off of 43 and divide it by two you find Kylie's age. The reason you divide by two is because there are two people and it is a combined age, meaning you would divide by two.

-Ɽ3₮Ɽ0 Ⱬ3Ɽ0

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