HELP!!!
Find the exact solution of x. 3x2 + 7 = 28

Answers

Answer 1

Answer:

2.65 I think I am not sure but the solution

Step-by-step explanation:

3x² = 28 - 7

3x² = 21

x² = 7

x = 2.65

Answer 2

Answer:

x = ± [tex]\sqrt{7}[/tex]

Step-by-step explanation:

Given

3x² + 7 = 28 ( subtract 7 from both sides )

3x² = 21 ( divide both sides by 3 )

x² = 7 ( take the square root of both sides )

x = ± [tex]\sqrt{7}[/tex]


Related Questions


find the sum . red is negatives and yellow are positives

Answers

Answer:

-3

Step-by-step explanation:

-6+3

beucase they are opposite signs (negative and positive) you subtract to find the difference; 6 minus 3 and you keep the sign of the larger number

Answer:

-3

Step-by-step explanation:

There are 3 yellows and 6 reds

then

(-6) + 3 = (-3)

Which has a greater slope, a horizontal line or a vertical line?

Answers

Answer:

A horizontal line has slope zero since it does not rise vertically (i.e. y1 − y2 = 0), while a vertical line has undefined slope since it does not run horizontally (i.e. x1 − x2 = 0).

Answer:

A horizontal line has a greater slope than a vertical line

What is the slope of the line with equation y-3=-1/2(x-2)​

Answers

Answer:

-1/2

Step-by-step explanation:

(h, k) --> point

m ---> slope

y - k = m (x - h)

Answer:

-1/2

Step-by-step explanation:

I got it right on EDGE

Which statements about density curves are true? Check all that apply.
The mean of a density curve is indicated by X.
The mean of a density curve is indicated by u.
The standard deviation of a density curve is indicated by o.
The standard deviation of a density curve is indicated by Sx.
The density curve can be above and below the x-axis.

Answers

Answer:

The mean of a density curve is indicated by µ.

The standard deviation of a density curve is indicated by σ.

This is the answer Egde 2020

The statements which are true about density curves is the mean of a density curve is indicated by u and the standard deviation of a density curve is indicated by Sx.

What is a density curve?

The density curve is a way of representation of numerical distribution data in graphical manner, where the outcomes are continues. The density curve can not be below the x-axis or horizontal line of the graph.

In a density curve,

The mean of a density curve is indicated by μ (mu).The standard deviation of a density curve is indicated by Sx.The density curve can only be above x-axis and not below it.

Thus, the statements which are true about density curves is the mean of a density curve is indicated by u and the standard deviation of a density curve is indicated by Sx.

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ratio of 12/7 and 36/21

Answers

The answer is true you welcome

Solve the equation and check the solution.
a minus 2 and one-half = 1 and one-half

A.a = 1
B.a = 3 and one-half
C.a = 4
D.a = 4 and one-half

Answers

A - 2 1/2 = 1 1/2

Solve for A by adding 2 1/2 to both sides:

A = 1 1/2 + 2 1/2

A = 4

The answer is c. A = 4

Check: 4 - 2 1/2 = 1 1/2

Answer:

C. A=4

Step-by-step explanation:

i just did the assignment

Which ordered pair is a solution for both ?

Answers

Answer:

(2, 9).

Step-by-step explanation:

You can plug the values into the equations and they would work.

HELP!!!! NEED ANSWER ASAP!
Leanne earned $400 and $550 in the interest in the last 2 years. How much interest must she earn
this year so that her average earnings over the three year period is more than $600?

Answers

Answer:

yes, its more than 600$ the answer is 700$ good luck and tell me if u got this right or wrong (if it's wrong, I'm sorry)

The camper to instructor ratio at a summer camp is 9 campers to 1 instructor. If the camp employs 13 instructors, what is the maximum number of campers the camp can have at a time?
campers

Answers

Answer:

117 campers

Step-by-step explanation:

YOOO HELP‼️

What is the slope of the line represented by the equation -52 + 2y = 10?

Answers

Answer:

5/2

Step-by-step explanation:

Use PEMDAS to solve the equation in y=mx+b form.

Add 5x on each side of the = sign  (which cancels on left side, and add on right)

Your equation should look like this: 2y=5x+10

Next, you're going to divide the whole equation by 2, to get y by itself

which equals y=5/2x+10

M=slope

B= y-intercept

Steve joins a gym with a first month fee of $50 and $10 every month after that. A. Write a function that shows the amount Rajs has paid after m months.(use f(m) and m in the function) B. How much will he have spent in total after 12 months?​

Answers

f(m)= 10m+50 m equals the amount of months and 50 is the starting value

Twice as a number plus 5 is equal to 27 what does x equal

Answers

Answer:

x=11

Step-by-step explanation:

2x+5=27

-5 -5

2x=22

x=11

Answer:

x = 11

Step-by-step explanation:

2x + 5 = 27

2x +5 - 5 = 27 - 5

2x = 22

x/2 = 22/2

x = 11

A line passes through (-2, 5) and has a slope of what is the equation of the line in point-slope form?
y+ 2 = } (x - 5)
A.
B.
y-5= (x + 2)
O C. y= {x +
3
o
D.
y+5 = (– 2)

Answers

y-5=m(x+2) is the answer in point slope form

Answer:

it actually y=1/3x+17/3

Step-by-step explanation:

First of all, remember what the equation of a line is:

y = mx+b

Where:

m is the slope, and

b is the y-intercept

To start, you know what m is; it's just the slope, which you said was 1/3. So you can right away fill in the equation for a line somewhat to read:

y=1/3x+b.

Now, what about b, the y-intercept?

To find b, think about what your (x,y) point means:

(-2,5). When x of the line is -2, y of the line must be 5.

Because you said the line passes through this point, right?

Now, look at our line's equation so far: . b is what we want, the 1/3 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the the point (-2,5).

So, why not plug in for x the number -2 and for y the number 5? This will allow us to solve for b for the particular line that passes through the point you gave!.

(-2,5). y=mx+b or 5=1/3 × -2+b, or solving for b: b=5-(1/3)(-2). b=17/3.

The equation of the line that passes through the point (-2,5) with a slope of 1/3

is

y=1/3x+17/3

There's your explanation

Derek spends $3 on breakfast and $5.50 on lunch every school day. How much does he spend on breakfast and lunch in a school week?

Answers

Answer

42.5 is the answer

Step-by-step explanation:

this question has several steps. Derek goes to school 5 days a week. Add 5.50 and 3 together and multiply it by 5.

5.50 + 3= 8.50

8.50 × 5= 42.5

(5.3 x 10^3) - (8 x 10^2)

Answers

Answer:

800

Step-by-step explanation:

please answer this before tomorow please guys help me help me please​

Answers

Answer:

3456

Step-by-step explanation:

5555

Answer:

which grade are you

Step-by-step explanation:

skskakksksksks

DUE IN 6 MINUTES!!

Which diagram provides a counter example to the statement below?

“Supplementary angles are never congruent.”


Answers

Two or more angles are supplementary if and only if they can add up to [tex]180^{o}[/tex].  Thus, the appropriate option would be C.

Supplementary angles are angles that add up to the value of angle on a straight line i.e [tex]180^{o}[/tex].

Congruent property of angles implies that they have equal value.

Thus, the given statement that: “Supplementary angles are never congruent”, implies that they can not be equal in value. Thus the contrary to the statement would be: “Supplementary angles are sometimes congruent.”

Considering the figures given in the question, the counter example to the given statement is the figure in option C. [tex]180^{o}[/tex]. Because angle 1 and 2 are approximately equal.

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Prove: BC|| AD

plz hurry

Answers

Answer:

AD is a straight angle and BC is straight also

Step-by-step explanation:

just look at the lines

5a+8+(-2a)=-7
I need help with this question especially because of the parenthesis

Answers

Answer:

5a+8+(-2a)=-7

5a+8-2a=-7

5a-2a=-7-8

3a=-15

3a/3=-15/3

a=-5

Answer:

a = -5

Step-by-step explanation:

Simplify both sides:

5a + 8 + (-2a) = -7

(5a + -2a) + 8 = -7

3a + 8 = -7

Start solving for a by subtracting 8 from both sides

3a+8-8 = -7 - 8

3a = -15

Next, divide both sides by 3

3a/3 = 1

-15/3 = -5

a = -5

NOW ANSWER THE QUESTION THIS TIME

Answers

Answer:

60 – 80 pounds, while a trophy can weigh over 100 pounds

1.4–1.8 kg (3.1–4.0 lb) and a fork length of 60 cm (24 in). At age seven, females average 10 kg (22 lb), males 5 kg (11 lb). King mackerel may attain 40 kg (88 lb), but any over 7 kg (15 lb) is almost certainly a female.

blue marlin 210 lbs

black marlin 1,650 lb

white marlins approximately 180

100 pounds.

Kamus luined 10 years old. Her mother is four times older than Kim.
How old is Kim's mother?

Answers

Her mother is 40 yrs

The equation of a line is y = -3x – 2. What are the slope and the y-intercept of the line?
A.
slope = -3 and y-intercept = 2
B.
slope = 3 and y-intercept = -2
C.
slope = 3 and y-intercept = 2
D.
slope = -3 and y-intercept = -2

Answers

D, slope=3x and y-intercept =-2

The slope of the line is - 3 and the y - intercept of the line is - 2.

What is Equation of line?

The equation of line passing through the points (x₁ , y₁) and (x₂, y₂) with slope m is defined as;

y - y₁ = m (x - x₁)

Where, m = (y₂ - y₁) / (x₂ - x₁)

Given that;

The equation of line is,

⇒ y = - 3x - 2

We know that;

The slope - intercept form of the equation of line is,

⇒ y = mx + b

Where, m is slope and b is y - intercept.

So, By comparing we get;

The slope (m) of the line = - 3

And, the y - intercept of the line = - 2.

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i will give you brainlliest and will give you some points
What is the value of 7 - 3 3 ÷ 9 + (-8 - 2)?

-3
-8
-6
-2

Answers

Answer:

-6 is the correct answer

Please help ASAP please I’ll mark as brainlister

Answers

Problems

The bottom of the red figure should be long; similar to the top of the blue figure.

The top of the red figure should be the same as the bottom of the blue figure.

Red are: (1, -1), (4, -1), (1, -5), (3, -5), (2, -2), (2, -4), (3, -4), (4, -2), (4, -2)

red points should be:

(1, -1), (3, -1), (1, -5), (4, -5),  (2, -2), (2, -4), (4, -4), (3, -2),  (3, -2),

Someone please help me

Answers

Question A = 30
Question B = answer choice A
question c = answer choice B
question d = answer choice A

The product of two factors is 3,500. If one of the factors is 70, which is the other factor?

A.
50

B.
80

C.
500

D.
700

Answers

Answer:✨

A. 50

✨Step-by-step explanation:✨

3,500 ÷ 70 = 50

Check if answer is correct:

70 x 50 = 3,500

I’m pretty sure it’s A. 50

The amount of water in a pool varies directly with the amount of time it is filling up. The pool has 2,900 liters of water after 15 seconds. How many liters of water will the pool contain after 45 seconds?

Answers

Answer: 24kg

Step-by-step explanation:

Can somebody who knows this answer all these correct plz thank you!!!!

(WILL MARK AS BRAINLIEST FIRST ANSWER)
Grade5math

Answers

7. 0.4

8. 0.55

9. 0.125

10. 3.5

11. 11.8

12. 7.625

13. 0.556 rounded nearest 10th = 0.6

14. 0.455 rounded nearest 10th = 0.5

15. 6.714 rounded nearest 10th = 6.7

Hope this helps :)

please help fastttt !!!

Answers

Answer:

32

Step-by-step explanation:

Please answer this question for me

Answers

Answer:

11, 12 is right

Step-by-step explanation:

if you do the equation the answer is 11.7473etc, and is in the middle of 11 and 12

Answer:

you marked the right one

Step-by-step explanation:

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