Answers
Answer:
The solution is [tex]\displaystyle x=1\pm \sqrt{47}[/tex]. Fourth option
Explanation:
Solve for x:
[tex]2x^2+3x-7=x^2+5x+39[/tex]
Move all the terms from the right to the left side of the equation, a zero in the right side:
[tex]2x^2+3x-7-x^2-5x-39=0[/tex]
Join all like terms:
[tex]x^2-2x-46=0[/tex]
The general form of the quadratic equation is:
[tex]ax^2+bx+c=0[/tex]
Solve the quadratic equation by using the formula:
[tex]\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]
In our equation: a=1, b=-2, c=-46
Substituting into the formula:
[tex]\displaystyle x=\frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-46)}}{2(1)}[/tex]
[tex]\displaystyle x=\frac{2\pm \sqrt{4+184}}{2}[/tex]
[tex]\displaystyle x=\frac{2\pm \sqrt{188}}{2}[/tex]
Since 188=4*47
[tex]\displaystyle x=\frac{2\pm \sqrt{4*47}}{2}[/tex]
Take the square root of 4:
[tex]\displaystyle x=\frac{2\pm 2\sqrt{47}}{2}[/tex]
Divide by 2:
[tex]\displaystyle x=1\pm \sqrt{47}[/tex]
First option: Incorrect. The answer does not match
Second option: Incorrect. The answer does not match
Third option: Incorrect. The answer does not match
Fourth option: Correct. The answer matches exactly this option
Related Questions
5.
Evaluate f(x) = -2x2 -4 for x = 3.
O -10
O -18
10
-22
Answers
9514 1404 393
Answer:
-22
Step-by-step explanation:
Put the value of x where x is and do the arithmetic.
f(3) = -2(3)^2 -4 = -2·9 -4 = -18 -4
f(3) = -22
which shows the best use of the associative and commutative properties to make simplifying 2/7 - 17 + 6 - 5/7 + 1 easier?
Answers
Answer:
B
Step-by-step explanation:
:)
Write a division equation to represent this model
Answers
Answer:
see below
Step-by-step explanation:
6/8 of 8 equal parts = 6
3/4 of 4 equal parts = 3
PLEASE PLEASE HELP WILL MARK BRAINLIEST
Find the equation of the line in slope-intercept form through (−5, 6) with slope = 3
Answers
Answer:
The answer is
[tex] \huge y = 3x + 21[/tex]
Step-by-step explanation:
To find an equation of a line given the slope and a point we use the formula
[tex]y - y_1 = m(x - x_1)[/tex]
where
m is the slope
( x1 , y1) is the point
From the question the point is (−5, 6) and slope = 3
The equation of the line is
[tex]y - 6 = 3(x + 5) \\ y - 6 = 3x + 15 \\ y = 3x + 15 + 6[/tex]
We have the final answer as
[tex]y = 3x + 21[/tex]
Hope this helps you
Answer:
The answer is y=3x+21
Step-by-step explanation:
7x-3x+7=3(x-4)+20 is it a one solution
Answers
gimme the formula :)
50 Point Bounty :)
Answers
Answer:
[6, 10]
Step-by-step explanation:
Let the weight of a pen be x
Then its weight can be between
8 - 2 = 6 g and 8 + 2 = 10 g
This can be shown as
8 - 2 ≤ x ≤ 8 + 2
6 ≤ x ≤ 10
x = [6, 10]
i think....
a librarian arranges 4356 books in rows , such that the number of rows is equal to the number of books in each row , find the number of books in each row.
Answers
Answer:
66
Step-by-step explanation:
Given that:
Total Number of books = 4356
Number of books in a row = number of rows
Let number of rows = b
Then number of books in each row = b
Total number of books = (number of rows * number of books per row
Hence,
4356 = b * b
4356 = b²
Take the square root of both sides
Sqrt(4356) = b
66 = b
Number of books in each row = 66
Find the domain of the function expressed by the formula: b y= 1/x −7
Answers
Answer:
All real numbers except 7
Step-by-step explanation:
Can someone help me please??
Determine the intercept of the graph.
Determine the x- and y-intercepts of the graph of
x + 3y = 9
Then plot the intercepts to graph the equation.
Answers
Answer:
x- intercepts = 9
y- intercepts = 3
2.Ricky has $100 to spend and wants to order some DVDs on the internet. Each DVD costs $15.00, and
shipping for the entire order is $10.00. What is maximum number of DVDs he can afford
Answers
Answer:
He can get 60 dvds
Step-by-step explanation:
This is why he can get 60 dvds Because 15x6=90 and 10 for shipping make it 100 exactly.
whats 8 and 2\5 as an improper fraction
Answers
it is very easy first multiply (8*2) then our ans 16
then add 16 + 5 = 21 21\5
answer 21\5
True or false to find the percent of a number we convert to a fraction or a decimal and then divide the number
Answers
true, when you convert to a decimal, you add a zero in the variable
What is the domain of y = csc(x)?
all real numbers
77
all real numbers except na +
where n is any integer
2
all real numbers except na, where n is any integer
all real numbers greater than 1 or less than-1
Answers
C.
ll real numbers except npi, where n is any integer
on edg2020
Would someone help me to understand this math. Thank you
LINES & LINE SEGMENTS ASSIGNMENT
Plot the following points on the number line below:
A: -25 B: -17 C: -13
D: -1 E: 4 F: 11
G: 16 H: 23 I: 25
Using the points and number line from the problem above, find each of the following. The first one is done for you.
a) BD = | -17 – (-1) | = | -17 + 1 | = | -16 | = 16
b) AE
c) EF
d) GI
e) CH
f) BG
g) CF
h) AC
Answers
Answer:
16, 29, 7, 9, 36, 33, 24, 12
Step-by-step explanation:
The distance between two points on a number line is the magnitude of the difference between their coordinates. In general, that means you can subtract the coordinate of the left point from the coordinate of the right point to find the distance.
Here, the points are in alphabetical order on the number line, left-to-right, as are the letters in the segment names. So you subtract the coordinate of the first point of the name from the coordinate of the last point in the name.
This is 8 simple subtraction problems.
a) D - B = -1 -(-17) = 16
b) E - A = 4 -(-25) = 29
c) F - E = 11 -4 = 7
d) I - G = 25 -16 = 9
e) H - C = 23 -(-13) = 36
f) G - B = 16 -(-17) = 33
g) F - C = 11 -(-13) = 24
h) C - A = -13 -(-25) = 12
_____
If you think of it as mileposts on a highway, it should be no surprise that the distance between milepost 4 and milepost 11 is 11 - 4 = 7 miles.
What the standard form 2.456
Answers
.2.456×10^ 11.thisis the answer
Priya’s family exchanged 250 dollars for 4,250 pesos. Priya bought a sweater for 510 pesos. How many dollars did the sweater cost?
Answers
510 pesos equals 24.12 U.S. dollars.
So Priya bought a sweater for 24.12 U.S. dollars.
Which of the following options have the same value as 20% of 45
Answers
Step-by-step explanation:
Answer:-The question says "20% of 45 ".
So, framing it , we get:-
[tex]\tt{\dfrac{20}{100}\times 45}[/tex]
So, solving it,
[tex]\tt{\dfrac{20\times 45}{100}}[/tex]
[tex]\tt{\dfrac{900}{100}}[/tex]
[tex]\tt{9}[/tex] is the answer.
Hope it helps :)
V 11. What is the result of multiplying 2.5 x 10 10 by 3.5 x 10 -7
Answers
Answer:
(2.5 x 10^10) x (3.5 x 10^-7) <--- When multiplying, numbers can be arranged in any order.
= (2.5 x 3.5) x (10^10 x 10^-7) <--- When you multiply numbers with the same base, add their exponents.
= 8.75 x 10^3
Step-by-step explanation:
Ali bought 16 packs of cola each pack had 6 cans he drank 9 cans how many left?
Answers
Answer:
87
Step-by-step explanation:
16 × 6 = 96 cans
96 - 9 = 87
Answer:
87
Step-by-step explanation:
common factor of 35 and 49 is
Answers
Answer:
7
Step-by-step explanation:
35 / 7 = 5
49 /7 = 7
Answer: 7
Step-by-step explanation:
Which of the following are factors of 12?
1 And 12
2 And 6
3 And 4
Answers
Answer:
id just learned this a month ago so i think its 2 and 6 i hope u get 100!
Step-by-step explanation:
Answer:
All three are correct.
Step-by-step explanation:
1x12 is 12, so #1 is correct.
2x6 is 12, so #2 is correct.
3x4 is 12, so #3 is correct.
find the cost of 4 1/3 m of cloth at $ 40 1/2 per metre.
Answers
Answer:
4 1/3 = 4.33 and 40 1/2 = 40.50Then, 4.33 × 40.50 =175.365Step-by-step explanation:
The Answer is 175.365..Thank you ☺️☺️
The distance from the floor of one level of the building to the floor of the level above it is 9 ft and 3/8 in. If the distance from the floor to the ceiling is 8 ft 2 and 1/2 in, how thick is the space between the ceiling of one floor and the floor of the level above it.
Answers
Answer:
Hope this solution helps you
Domain
1. {×€ R | X ≠ 0}
2. {x + R | x≠1}
Answers
1) Go..
[tex]domain = ( - \infty \:,\: 0) \: U(0 \: ,\: + \infty ) \\ [/tex]
2) Go...
[tex]domain = ( - \infty \: ,\: 1)U(1 \: ,\: + \infty ) \\ [/tex]
_________________________________
And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️
solve for x 3x+10 3x -28 will mark brainest answers are 1. 33 2. 34 3. 35 4. 36 ty so much 1 left godbless
Answers
Answer:
1. x = 33Step-by-step explanation:
3x+10 + 3x -28 = 180
3x + 3x = 180 + 28 - 10
6x = 198
x = 198/6
x = 33
Answer:
33
Step-by-step explanation:
By the same side interior angle theorem, we can find that 3x + 10 and 3x - 28 are supplementary. Knowing this, we can make the equation:
(3x + 10) + (3x - 28) = 180
Now we can solve for x. Combine like terms.
6x - 18 = 180
Add 18 from both sides.
6x = 198
Divide both sides by 6.
x = 33
So the value of x would be 33.
I hope you find my answer and explanation to be helpful. Happy studying.
CAN SOMEONE HELP ASAP
Answers
Answer:
a = 3, b = -4
Step-by-step explanation:
You need to combine like terms in the expression. In the end, you get 3 - 4i. That's in the form of a + bi. So a = 3 and b = -4
help pleaseeeeeeeeee
Answers
Answer:
3/-2
Step-by-step explanation:
All I did was put - 3/2 into my calculator and got the answer. I than found the answer for the rest of the fractions and only the first one equals to - 3/2.
which is parallel to y=8x + 4
a. 4x + 8
b. y=12x
c. y=8x-4
Answers
Answer:
C
Step-by-step explanation:
c is parallel because the slopes are identical
What is the Reciprocal of 10/3
Answers
Answer:
3/10
Step-by-step explanation:
If you flip 10/3 you get 3/10
Help answer this please!!!!!!!!!
Answers
Answer:
210 yards
Step-by-step explanation:
You are told that the two triangles (trails) are similar (since Perry wants to construct a similar trail to Hillsville's) this means that there is a scale factor meaning the length of one side of the Hillsville trail * scale factor = length of corresponding side of Perry's trail)
1. One side of the Hillsville trail that measures 400 yards corresponds to the 280 yard side of Perry's trail so the scale factor is
280/400 -> 7/10
2. Use the scale factor to find n since you know that the length of one side of the Hillsville trail * scale factor = length of corresponding side of Perry's trail
n = 300 * 7/10 -> n = 210
