Mathematics Middle School

12.
What is the solution of the equation x2 + 2x - 7 = 0?

Answers

Answer 1

Answer:

cancel out as much of the equation as possible by doing inverse operations so add the 7 to both sides

x2 + 2x = 7

Divide by 2

x2 = 3.5

divide by 2 again

x = 1.75

now change x with 1.75 to check

1.75 x 2 = 3.5

3.5 + 3.5 - 7 = 0 so 1.75 is correct

Hope this helps

Step-by-step explanation:

Related Questions

its in the picture lol

its in the picture lol

Answers

Answer:

x>8 Letter E

Step-by-step explanation:

PLEASEE HELPP!!!!!!!!

PLEASEE HELPP!!!!!!!!

Answers

Answer: total area is 216

Step-by-step explanation:

you do LxH for the square =168

you do LxH then divide by 2 =48

then add the answer for both together for the total area 216

Answer: 216

Step-by-step explanation:

multiplied 14 by 12 you get 168. Then multiply 12 by 8 and divide by 1/2, you get 48. 168 + 48 = 216

can someone help me thank you

can someone help me thank you

Answers

Answer:

Thrid one down

Step-by-step explanation:

It turns the other way.

Answer:

Step-by-step explanation:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

solve for the Area Please and Thank you

solve for the Area Please and Thank you

Answers

Answer:

8k^2+3

Step-by-step explanation:

hope this helps

Answer:

\(k^4+10k^2+21\)

Step-by-step explanation:

\(k^2 (k^2)\) is the same as saying \((k)(k)(k)(k)\) and so it'll be \(k^4\). Combine \(7k^{2}\) and \(3k^{2}\) by adding them both to get \(10k^{2}\). Then multiply 7 by 3 to get 21. Therefore the area of the entire rectangle written in standard form as a polynomial is \(k^4+10k^2+21\). Write the polynomial with the highest degree being first to the lowest degree and that's how you write the polynomial properly.

A map has a scale of 1 cm: 5 km. Determine how far apart two cities are if they are 8 cm apart on the map.

A. 1/5 = 8/x
B. 1/x = 5/80
C. 1/5 = 80/x
D. 1/x = 8/5

Answers

Answer:

A

Step-by-step explanation:

Let's set up two ratios...

1 cm : 5km

8 cm : x km

Therefore the answer is A

Yes A is correct because the 8 cm turns into the same amount of kilometers

PLEASE HELPPPPPPP
The weather report says the temperature is 20°C and will drop 5°C per hour for the next 6 hours. Daryl plans to be gone for at least 6 hours, and he has a plant outside. If he wants the plant to remain in temperatures above –10°C, should Daryl move his plant to a warmer location before leaving?

An inequality to model the problem is
20+5x>-10
20-5x>-10
20-5x<-10
20+5x<-10
The solution is
x<3/4
x<2
x<6
x>6

Answers

Answer:

I think it's B. Sorry if that's wrong.

Step-by-step explanation:

Hint:

B is the answer

Step-by-step explanation:

just put in b

WILL MAKE BRIANLIEST HAS SOON I CAN. use each of the digits 0 to 9 once to form two mixed numbers with a sum of 100

this is one solution 29 1/3+70 56/84 find another solution

Answers

Answer:21 21 21 21 21 21

Step-by-step explanation:

Challenge excepted.

63 1/2 + 36 50/100
78 6/9 + 21 1/3
80 5/10 + 19 30/60

Yeah.. I’m not going to name any more. These are all of my solutions. Hope this helped :D

I need help with this can you please help.↑↓

I need help with this can you please help.

Answers

Answer:

O = 8

K = 0

L = 1

V = 7

I = 2

M = 4

H = 9

E = 6

T = 9

N = 5

Step-by-step explanation:

May I have Brainliest please? My next rank will be the highest one: A GENIUS! Please help me on this journey to become top of the ranks! I only need 10 more brainliest to become a genius! I would really appreciate it, and it would make my day! Thank you so much, and have a wonderful rest of your day!

Answer:

1) O = 8

2) K = 0

3) L = 1

4) V = 7

5) I = 2

6) M = 4

7) H = 9

8) E = 6

9) T = 9

10) N = 5

Step-by-step explanation:

Help. I'll mark as brainlist.

Help. I'll mark as brainlist.

Answers

Answer: okay, I think the answer would be <NQP and <PQN if the answer is asking for a different way to identify it other than <Q

Angle NQP and angle PQN

What are the possible shoe sizes of the players on Justin's team?

What are the possible shoe sizes of the players on Justin's team?

Answers

the answer is 9 1/2 your welcome btw
9 1/2 is the answer

Help pLEASE! be sure its right!!

Help pLEASE! be sure its right!!

Answers

The answer is a. The rational number 22/9 is equal to 2.¯4.

Answer:

i hope it helps

Step-by-step explanation: 24/9

plz give me brainlliest

Simon has 1 1/2 hours to complete his homework. He spends 9/10 hour on science homework. He spends the rest of the time on math homework. Each math problem takes him 1/15 hour to complete. How many math problems did Simon complete for homework?

Answers

Answer:6 math problems

Step-by-step explanation:

Juan and Ari went to the farmers market to buy fruit. Juan’s bag of apples that he bought weighed 31/7 pounds. Ari’s bag of oranges that she bought weighed 19/3 pounds. About how much heavier is Ari’s bag than Juan’s bag

Answers

Answer:

Exact Form:

40/21

Decimal Form:

1.90476190

Mixed Number Form:

1 19/21

Step-by-step explanation:

What number is 0.179 more than 0.696

Answers

Answer:

0.875

Step-by-step explanation:

Since the statement says 0.179 more than 0.696, we have to add to get to the solution. Adding both decimals will result us to a sum of 0.875.

Based on the information given regarding the decimal, it should be noted that the correct option is 0.875.

Solving decimal.

It should be noted that the statement "what number is 0.179 more than 0.696" simply means that we've to add the numbers given.

This will be;

= 0.179 + 0.696

= 0.875

Therefore, the correct option is 0.875.

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I forgot how to do the fraction part can you please explain it on the bottom? tysm! :)

Solve the equation 2x + 3 1/2 = 7

Answers

Answer:

x = − 4.25

Step-by-step explanation:

So, x would equal negative 4.25

The answer is X= -4.25 :)

NEED HELP ASAP Match each set of information about a circle with the area of that circle.

Drag and drop the card to match the information.

NEED HELP ASAP Match each set of information about a circle with the area of that circle.Drag and drop

Answers

Answer:

the first one is A The second on C the third one D and last one B

Step-by-step explanation:

1.A
2.C
3.D
4.D

Hope this helps

I don’t understand how to do this question please help and explain thank you!

I dont understand how to do this question please help and explain thank you!

Answers

Here use this information and fill the table....:)
I dont understand how to do this question please help and explain thank you!

Answer:

<1=<3=<5=<7

Step-by-step explanation:

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URGENT PLS HELP NOW
Choose the expression that is equivalent to fraction with 6 raised to the negative tenth power in the numerator and 6 raised to the fourth power times 6 raised to the zero power in the denominator.

−614
negative 1 divided by 6 raised to the fourteenth power
614
1 divided by 6 raised to the fourteenth power

Answers

your answer is 1/6 ^ 14 !!!!

The expression will be 1 divided by 6 raised to the fourteenth power .

Expression ⇒ \(\frac{1}{6^{14}}\) .

Given,

Fraction with 6 raised to the negative tenth power in the numerator and 6 raised to the fourth power times 6 raised to the zero power in the denominator.

Now,

Writing in terms of expression:

\(\frac{6^{-10} }{6^4*6^0}\)

Simplifying the expression,

Expressing \(6^{-10}\) in denominator part,

⇒ \(\frac{1}{6^{10}*6^{4}*6^{0}}\)

As \(6^0\) is equals to 1.

So,

⇒ \(\frac{1}{6^{14}}\)

Therefore option D is correct.

Know more about exponents,

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The value 0.1 meter is equivalent to 1 ____.
centimeter
decimeter
decameter
hectometer

Answers

Centimeter I believe

Answer:

I think this is decimeter

Step-by-step explanation:

giving brainly for correct answer

giving brainly for correct answer

Answers

Six (I’m putting this because there is a there is less than 20 characters)

Answer: Hello there! Your answer for this question is option (D).

Step-by-step explanation: The answer is option (D) because there is 10 students that completed 10-19 problems and 8 students that completed 0-9 problems.

10 + 8 = 18

You are Welcome! :)

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Dione collects trading cards. His favorites are baseball and football cards. For
every 9 baseball cards he owns, Dione has 16 football cards. What is the ratio
of baseball cards to football cards in his collection?
OA. 16 to 9
OB. 9:16
C. 9 and 16
O D. 16

Answers

Answer:

Correct option is B) 9:16

Answer:

9:16

Step-by-step explanation:

B

Factor 18x - 36
What is the GCF?

Answers

Answer:

GCF is 18 and Factor is: 18(x-2)

Step-by-step explanation:

To Factor 18x-36, you want to find the GCF. So the GCF here is 18. So let's spilt 18 out of each term.

18x+18(-2)

18(x-2)

So the factoring answer is 18(x-2)

The GCF is 18.

Answer:18

Step-by-step explanation:

the GCF is 18.

What percent is equivalent to 3/10

Answers

30%

3/10 x 10/10
Move the decimals till it’s a 30

The percent which is equivalent to 3/10 is 30%.

Given is a fraction.

The fraction is 3/10.

We have to find the percentage which is equivalent to the given fraction.

Percentage is defined as the parts of a number per fraction of 100. We have to divide a number with it's whole and then multiply with 100 to calculate the percentage of any number.

So we need to find the fraction with the denominator 100 to find the equivalent percentage.

When 3/10 is multiplied both numerator and denominator by 10, we get the fraction 30/100.

So the percentage is 30%.

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simplify the expression (-h^4)^5

Answers

See image below! If this is right please give me brainlest
simplify the expression (-h^4)^5

when a number is to a power then to another power, the answer is the number to the power TIMES the other power

it should be:

-h^20.

Write -7 2/3 as an improper fraction.

A. -23/3
B. -21/3
C. -14/3
D. -19/3

Answers

-7•3+2/3
-21+2/3
So the answer is -23/3
A.)-23/3

Answer:

\(\textsf{A.} \quad -\dfrac{23}{3}\)

Step-by-step explanation:

Given mixed number:

\(-7 \frac{2}{3}\)

To convert a mixed number into an improper fraction, multiply the whole number by the denominator of the fraction and add it to the numerator of the fraction, then place the answer over the denominator:

\(\implies -\dfrac{7 \times 3+2}{3}=-\dfrac{21+2}{3}=-\dfrac{23}{3}\)

Simplify this radical. √x^13

\(\sqrt{x^1^3}\)

Answers

Answer:

x^6sqrt

Step-by-step explanation:

simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.

x^6√x


please show work i rlly need this :)

please show work i rlly need this :)

Answers

Answer:

10/16 (written as a fraction)

Step-by-step explanation:

Starting point

-(-2x+1)=9-14x

Solve the minus sign

2x-1=9-14x

Swap the Xs and the numbers, changing sign

2x+14x=9+1

Do calculations

16x=10

Result

x=10/16

Last step solution= x= 5/8 (in fraction)
please show work i rlly need this :)

What is the domain and range of:

What is the domain and range of:

Answers

Answer:

b

Step-by-step explanation:

how it works with life

The answer is b explanation I asked my math teacher on mine

A factory produced a batch of handheld video games, but 4% of the games were found to be defective. If the batch had 250 games in all, how many games in the batch were not defective?

Answers

Answer:

240 video games

Step-by-step explanation:

The percent of not defective video games is

(100-4)%=96%

\(250(1-\frac{4}{100}) =250(\frac{96}{100})=250(.96)=240\)

I hope this help you

Answer:

240 games were okay

The length of a car is 21 meters. How many centimeters is that? A. 2,100

B. 21,000

C. .021

D. 2.1

Answers

Answer:

A. 2,100

Step-by-step explanation:

1 m = 100 cm

so, 21 m = 21×100

=2100cm.

21x100=2,100
(A.) have a great day:D
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