solve the equation
7x^2+21=0

Answers

Answer 1
Subtract 21 from both sides
7x^2=-21
Divide by seven on both sides
X^2=-3
Square root both sides

***X= square root of -3***
:)

Related Questions

serious question... give me 3 reasons why phones are important and ill give brainly( please help me i dont wanna joke around i actually need the answer)

Answers

Answer:

The number one reason why phones are important is to use it as a way of communication. This can help connect people to the outside world & can open up the minds of younger people. The second reason why phones are important is in the case of emergencies. This can help parents make sure they know where their child is at any given time. & lastly, the main reason is that it can be used in education. Phones can be great for researching things, & getting projects/homework done.

Hope this helps!!!

Please help and If you can have a good night

Answers

Answer:

Please help and If you can have a good night

SSS

∦∦∦∦∦∦∦∦∦∦∦~>~>~>~>~>~>~>~>~>~>~>~>~~>>~>~~>~>~>~>~>~>~>~>~>~>~>~>~>~>~>~>~>~>>~~
Halp meh

Answers

Cgjvxruomnvvcxdseryuinvx

4 workers can make 32 widgets in an hour how many widgets can five workers make in 90 minutes

Answers

Answer:60

Step-by-step explanation:

32 divided by 4 is 8 8 an hour per worker 90 mins is hour and a half 8 times 5 40 each person can make 4 in 30 min so 20

40+20=60

sorry i am a bad explainer

60 widgets can five workers make in 90 minutes.

What is  multiplication?

In mathematics, multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.

here, we have,

4 workers can make 32 widgets in an hour .

1 hour = 60 mint.

now,

4 workers work 60 mint. to make 32 widgets

so, 1 workers work 60 mint. to make =32/4

                                                             =8 widgets

1 workers work 1 mint. to make =8/60 widgets

i.e.  1 workers work 90 mint. to make =8*90/60 widgets

5 workers work 90 mint. to make =8*90*5/60 widgets

solving we get,

5 workers work 90 mint. to make =60 widgets

hence, 60 widgets can five workers make in 90 minutes.

To learn more on multiplication click:

brainly.com/question/5992872

#SPJ2

What is the solution set of -|x|= -8?
{8}
{-8}
{-8,8)
no solution

Answers

....the answer is -8,8

Step-by-step explanation:

-|x|=-8

if we put the value =8

we get,

-|8|=-8

if we put the value =-8

-|-8|=-8

so,

answer of this questions is {-8,8}

3. A clown sells large balloon animals for $25 each. Small balloon animals sell for $10 each. Jordan is buying 2 large balloon animals and x small balloon animals. Let y represent the total cost Jordan must pay in dollars.
Write an equation in slope-intercept form to model this description.

Answers

Answer:

Step-by-step explanation:

y= 2x + 50

Pls I need help with this

Answers

Answer: Yes

The answer is:

Yes, both of this is equivalent.

Step-by-step explanation:

For the reason and solution, here:

1) 4x+6/2+3=

Factor: 2(x+3)Simplify: 2x+6

2) 4x+9=

This cannot be factored or simplified.

For me, these two is equivalent because "4x+9" equivalent is 2x+6 and this is the same if you simplified 4x+6/2+3 so for me, the answer is yes.

Hope this helps and if you could mark this as brainliest. Thanks!

can someone help with this also

Answers

Answer:

1st choice c>190.29

Step-by-step explanation:

First I subtracted 668 from 2000 ad got 1332. I then divided 1332 by 7 since they are collecting cans on the final 7 days. and got 190.285714286. When I round up the answer I got 190.29. Now I can immediately know that the 2nd choice is wrong. In the first sentence of the question, it said "more than 2,000" so based on that I know it's the answer choice with the greater than sign.

Hope this help you :)

Answer:

the third one or C

Step-by-step explanation:

2000-668=1332

1332÷7= 190.285

round

190.29

C > (pretend their is a line under the >) 190.29

marking brainliest and extra points

Answers

Answer:

B

Step-by-step explanation:

If you Divide 60 by 2 you would get 30 but if you divide by four ill be 15 so for b ill be 2 and a will be 4

Please help me solve this it’s I center

Answers

Answer:

Think about it this way:

triangle KDI is supplementary to EHK. SO if we find the angles of KDI we can do the same for EHK. Additionally, the m<H in the triangle HKF is 90 degrees and since it is supplementary to EHK then the measure of h in EHK is also 90 degrees. So m<h is 90. All three angles will equal to 180 since the interior angles of any triangle equal 180°

Now, lets find the measures of KDI so we can solve for the measure of K in the triangle EHK

D in KDI is 19 degrees and the square on I in KDI indicates its a 90 degree angle. Those add up to 109 degreess meaning measure of k must equal 71 degrees (180=109=71) since the interior angles of any triangle equal 180. Therefor in the triangle EHK, h is 90, and k is 71 degrees by vertical angles theorem. 90 and 71 add up to 161 degrees meaning angle E is going to be equal to 19 (180-161=19). this, therefore means 17x-7=19

solve:

17x-7=19

17x=26

x=26/17

x=1 9/17

You can write it as a decimal, improper fraction or mixed number.

Step-by-step explanation:

There is a leak in the attic due to rain.Jared is planning to use buckets to catch the dripping water.The number of buckets (y) filled during (x) hours can be represented by the equation y = 0.4x. How long will it take to fill 2 buckets(hours)

Answers

Answer:

5 hours

Step-by-step explanation:

The problem is giving you the equation

y =  0.4x; where y is the # of buckets filled and x is the hours.

If they you 2 filled buckets, then how many hours?  

You need to solve for x

y = 0.4x; to get the x by itself, divide by 0.4

x = [tex]\frac{y}{0.4}[/tex] ; now substitute y with 2 ( for 2 filled buckets)

x = [tex]\frac{2}{0.4}[/tex] = 5; which means it took 5 hours to fill up 2 buckets.

what is the answer?​

Answers

Answer:

(2/5, 26/5)

Step-by-step explanation:

graph them on desmos

What is the largest output achieved by the function? At what x-value is it hit.

Answers

Answer:  

f(1) = 4  

Step-by-step explanation:

Largest output is 4, when x=1.

If IN=2x+10 and AT=26, find x.

A.) 12
B.) 10
C.) 6
D.) 8

Answers

Answer:

Step-by-step explanation:

2x +10 = 26

2x = 16

x = 8

answer is d

Answer:

8

Step-by-step explanation:

Since these two triangles are congruent, IN is equal to AT. Solve the following equation:

2x + 10 = 26

2x = 16

x = 8

2a²b+6ab²
WHAT
IS
THIS
I
GIVE
5
STARS!!!

Answers

Answer:

I'm pretty sure it is 2ab×(a+3b)

Solve for a: 3a – 5(a – 2) = 34

Answers

3a-5(a-2)=34
3a-5a+10=34 (i developed)
-8a+10=34 (i subtracted 3a and 5a)
-8a=34-10 (brought 10 to the other side so it becomes negative)
-8a=24
a=24/-8 (multiplication become division)
a=-3

Answer:

a=12

Step-by-step explanation:

Find the inequality represented by the graph​

Answers

Answer:

y < 1/4x + 3

Step-by-step explanation:

the line is dotted so we know the symbol will not include the "equal to" part

we can also see that the shading in below the y intercept, so we know that the symbol will also be less than

this means the symbol is <

now, create an equation for the line:

we know that the y intercept is 3, and that there is a rise of 1 and a walk of 4

so the slope is 1/4

now put this together and you get 1/4x + 3

this part will go on the right side of the < symbol in your inequality

so now you can create an inequality: y < 1/4x + 3

Answer:

y < [tex]\frac{1}{4}[/tex] x + 3

Step-by-step explanation:

m = [tex]\frac{1}{4}[/tex] and coordinates of y-intercept are (0, 3)

y < [tex]\frac{1}{4}[/tex] x + 3

A football team loses 6 yards on its first play. On the next play, the team gains 3 yards.
Which inequality(ies) compare(s) the yardage values correctly? Select ALL that apply.
0 -6> 3
0 -6<3
0 -6<-3
O 3<6
♡ 3-6
? 3<.6

Answers

Shshhshsxsbsbdbbxbxbfbfbfbdbbdjdjdjdkdd

Please help me with this maths question, brainiest and points will be given. THANK YOU!!!

Answers

Step-by-step explanation:

Let the number of weeks be X.

[tex]743 = x \times 63 + 50 \\ 743 = 63x + 50 \\ 743 - 50 = 63x \\ 693 = 63x \\ x = 693 \div 63 \\ \frac{693}{63} \\ \\ = 11 \: weeks[/tex]

Here, is your answer.

...and by the way myself Zeeshan Khan from India

Please answer the following problems as a fraction:

1. - 9/10 + 7/10 =

2. - 1/2 — 2/5 =

Answers

Answers:

1. - 9/10 + 7/10 =-0.2

2. - 1/2 - 2/5 =-0.9

Have a beautiful day! v(⌒o⌒)v♪

Miguel bikes 23 km per hour and starts at mile 10. Gabby bies 28 km per hour and starts at mile 0. Which system of linear equations represents this situation?

Answers

Answer:

y = 23x + 10

y = 28x + 0

Step-by-step explanation:

Given that:

Miguel :

Velocity = 23 km/hr

Starting position = 10 miles

Gabby:

Velocity = 28 km/hr

Starting position = 0 miles

The general form of a linear equation :

y = mx + c

In the scenario above ; the starting points corresponds to the intercept, c

The distance moved per hour (velocity) is the slope (m), which is the change in y per unit change in x

Hence ;

Miguel:

y = 23x + 10

Gabby:

y = 28x + 0

The sum of ten consecutive whole even numbers is 1190

Answers

Answer:In other words, since even numbers are the multiples of 22, we can represent an even integer nn by 2k2k, where kk is also an integer. So if we have the even integers 1010 and 1616, we can rewrite them asn=2k→10=2(5)

n = 2k\, \to \,\,16 = 2\left( 8 \right)\,n=2k→16=2(8)

Step-by-step explanation:

Consecutive Even Integers

The best way to illustrate what consecutive even integers are through the use of examples. Observe that any pair of two consecutive even integers are 22 units apart. In other words, if you pick any even integer in the set of consecutive even integers then subtract it by the previous one, you will always get the difference of \bold{+2}+2 or simply \bold{2}2, written without the \bold{+}+ symbol.

Find the distance between A and B

Answers

Answer:

The distance between A and B is 2.6

Step-by-step explanation:

We know that there are 2 whole numbers from -1 to 0 and 0 to 1. Then we can add the 0.3 from both sides. 0.3 plus 0.3 is 0.6.

I hope this helped and if it did I would appreciate it if you marked me brainliest, thank you and have a nice

day

Answer:

27 cm or 2in and 6cm!

Step-by-step explanation:

count the lines.

The function h is a quadratic function whose graph is a translation 3 units left and 4 units up of the parent
function f(x)=x. What is the equation of h in vertex form and in the form y = ax? +bx+c?

A. y=(x-3)^2 +4; x^2 -6x+9
B. y=(x-3)^2 +4; y=x^2 -6x +13
C. y=(x+3)^2 +4; y=x^2 +6x+9
D. y=(x+3)^2; y=x^2 +6x+13

Answers

Answer:

D ( if you add +4 to the (x + 3)^2)

Step-by-step explanation:

Parent function is f(x) = x^2

A translation 3 units left gives y = )x + 3)^2

- and 4 up gives y = (x + 3)^2 + 4 - vertex form.

Standard form :

y = x^2 + 6x + 9 + 4

= x^2 + 6x + 13.

Please help me. 27.1 X 10.105


Answers

Answer:273.8455

Step-by-step explanation:

i do what i can

What are the zeros of the function below? Check all that apply.
(x - 1)(x + 1)
----------------
6(x-4)(x+7)
A. 7
B. 1
C. -1
D. 4
E. 6
F. -7​

Answers

pretty sure it’s D and F because if you set (x-4)=0, x is 4 and if you set (x+7)=0, x is -7

1. x + 5 = 23 2. 2x + 1 = 13


3. 3x - 7 = 14

Answers

1. 18. Subtract 5 to both sides
2. 6. Subtract 1 to both sides, then divide both sides by 2.
3. 7. Add 7 to both sides, then divide both sides by 3.

Carl's grandfather is exactly 5 times older than Carl.
Which three statements must be true?​

Answers

Answer:

g = 5c

5*c = g

g/5 = c

Step-by-step explanation:

g = grandfather

c = carl

Answer:

The age of Carl's grandfather is a composite number.

Carl's age is a factor of the age of his grandfather.

The number 5 is a factor of the age of Carl's grandfather.

Solve for x.
75°
11x-2

Answers

Answer:

x=7

Step-by-step explanation:

(3x-5) (7x+5) find x


Answers

Answer:

I

Step-by-step explanation:

3x-5+7x+5+90=180

x=9

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