Answers
Answer:
[tex]x=\pm \sqrt{21}/7[/tex]
Step-by-step explanation:
We can add 9 to both sides of the equation to get [tex]21x^2=9[/tex].
We can divide both sides of the equation by 21 to get [tex]x^2=9/21[/tex].
We take the square root of both sides of the equation to get [tex]x=\pm \sqrt{9/21}[/tex].
However, that isn't in the form we need.
We know that [tex]\sqrt{9/21}=\sqrt{9}/\sqrt{21}=3/\sqrt{21}=3\sqrt{21}/(\sqrt{21}*\sqrt{21})=3\sqrt{21}/21=\sqrt{21}/7[/tex]
so the answer is really [tex]x=\pm \sqrt{21}/7[/tex] and we're done!
Related Questions
A rectangle has an area of (4x+12) square units. Write Three multiplication expressions that can represent the product of the length and the width of the rectangle.
Answers
Answer:
This is easy to do on your own. Just think of 3 numbers, put them in for x, solve, and show your work.
Step-by-step explanation:
If i get good grades in 8th grade will it affect the classes I get in 9th grade?
Answers
Answer:
It will result if you have advanced classes or get an Ap class
Step-by-step explanation:
It will not affect your 9th grade..
Yet, you should work hard to achieve your aim and gain knowledge not for getting better marks.
Miguel has a smart phone data plan that costs $45 per month that includes 10 GB of
data, but will charge an extra $20 per GB over the included amount. How much
would Miguel have to pay in a month where he used 3 GB over the limit? How much
would Miguel have to pay in a month where he used went over by x GB?
Answers
Answer:
well for th first part 105
Step-by-step explanation:
20x3=60=45-105
Which number sentence is true? O A) 2.3 x 102 > 2000 OB) 3.45 > 1-4.35| OC) 345 > 5:33 825 OD 13
Answers
Answer:
D) -2.14< root10 <|-2.8|
Step-by-step explanation:
the value for -2.14 is as plain as you can see, the negative version of 2.14.
The square root of 10 is 3.16227766.
The lines next to -2.8 is asking for the absolute value of -2.8, or the distance between that number and zero. The distance between -2.8 and 0 is positive 2.8, because distance can't be negative.
The 3 numbers taken from the explanations are -2.14, 3.16, and 2.8. Ranking them from least to greatest would give you -2.14, 2.8, 3.16, or -2.14< root10 <|-2.8|
pls guys help me pls pls pls pls
Answers
Answer:d
Step-by-step explanation:
xsn
Question is down below
Answers
Answer:
Step-by-step explanation:
2+6=8
8x divide by 5=1.6x
4x-3=1x
1.6x=1x
What property is used to rewrite (9)(-8) as (9)(-1)(8)?
Answers
Answer:
The distributive property.
A large orange weighs 11/16 pound. A small orange weighs 2/8 pound. How much more does the large orange weigh?
Answers
Answer:
7/16 pounds
Step-by-step explanation:
Change the small orange to have the same denominator by multiplying by a magic 1 or [tex]\frac{2}{2}[/tex].
1. [tex]\frac{2}{8}[/tex]·[tex]\frac{2}{2}[/tex][tex]=\frac{4}{16}[/tex]
2. Subtract Fractions
[tex]\frac{11}{16}[/tex]-[tex]\frac{4}{16}[/tex]=[tex]\frac{7}{16}[/tex]
Tanner's chemistry textbook weighs 5/6 of a pound and his geometry textbook weighs 1/6 of
a pound. How much more does the chemistry textbook weigh than the geometry textbook?
i will give thanks and brainliest
Answers
A rectangular park is 4km long and 2.4 km wide. A. What is the distance if you walke diagonally across the park b. How much shorter is your walk compared to walking the length and width of the park?
Answers
Answer:
buuin ang mga sumosunod na hulwarang ritmo grade 4 mosic
For functions f and g defined by f(x) = x² + 7 and g(x) = x - 3, what is the value of f(g(5))?
Answers
f(g(5)) = f(2) = 2^2 + 7 = 11
The value of f(g(5)) is 11.
I need help with this
Answers
Find the missing angle
Answers
Answer:
58 degree
Step-by-step explanation:
the total degree of the three interior angles together of a triangle = 180
here 2 sides are given so to find the 3rd angle we can just add the other 2 angles and subtract it from 180
so it'll be
[tex]65 + 57 = 122[/tex]
[tex]180 - 122 = 58 \: degrees[/tex]
answer = 58 degree
what multiplies -46 and adds up to 21
Answers
Answer:
-2 and positive 23
Step-by-step explanation:
Perform the indicated operations. 8/12÷11/15 • -1/4
A.-5/22
B.5/22
C.-11/90
D.11/90
Others:______
Answers
Answer:
A.-5/22
Step-by-step explanation:
[tex]\frac{8}{12} /\frac{11}{55} *-1/4 = -5/22[/tex]
plug it into a calculator.
Please tall me if you have any other questions.
Have a nice day! :-)
-1/2+ 3/4 hmm what is it?
Answers
Answer:
-1/2+ 3/4
-1+3
2
2+4
6
:2/6
Plz help it’s due tonight!!!
Answers
Plzzz help me with this question and I also want working. Whoever will answer will be BRAINLIEST.
Answers
Answer:
[tex]for \: quadrilaeral \: \: sum \: of \: angles \: is \: equal \: 180 \times 2 = 360 \\ 80 + 70 + x + 2x = 360 \\ 3x = 360 - 70 - 80 = 210 \\ x = 210 \div 3 = 70 \\ q = 70 \\ r = 140[/tex]
3.7 to fractionkdxnxnwlwosxxjxjobe2ih3eduhggsxioqswgss
Answers
Answer:
37/10
ljjlljlln;knbhkl;;;;;;;;;;;;nj,
Can someone help me out please.
Answers
Step-by-step explanation:
You need to reflect the shape along the line
Find the coordinates of the vertices of the figure after the given transformation.
translation: (x, y) (x - 4, y + 4)
)
A)
J'(1,0), N'(5,0), M (5,3), P (2,5)
B)
J'(-2,5), N'(2,5), M (2, 2), P'(-1,0)
J'(-3, 4), N (1, 4), M'(1, 1), P'(-2,-1)
D)
J'(-1,0), N'(-5,0), M'(-5, -3), P"(-2,-5)
Answers
Answer:
b
Step-by-step explanation:
because b look like a great answer
Which is the equation, in the point-slope form, for a line that goes through (2,-6) and has a slope of -3/4
Answers
Answer:
y+6 = -3/4 * (x - 2)
Step-by-step explanation:
* = multiplication
2y - 3y = 5 solve the equation check your solution
Answers
Answer:
y = -5
Step-by-step explanation:
-y = 5
y = -5
Check:
2(-5) - 3(-5) = 5
-10 + 15 = 5
5 = 5: Checkmark!
The ratio of blue marbles to white marbles in a bag is 4 to 5. At this rate how many blue marbles are there if there are 15 white marbles
Answers
Answer:
Step-by-step explanation:
ratio of blue marbles to white marbles = 4:5
15/5=3
4x3:5x3
ratio if there are 15 white marbles= 12:15
denoting that 12 blue marbles would be there
11. Liza earned some money delivering newspaper .She bought a
battery for $1.95, and gave her mother $30. She bought a ring
for $7.20, and then spent half of the remaining money on a radio.
If Liza has $38.50 left, how much money did she earn delivering
newspapers?
anonh the solution set.
Answers
Answer: $116.15
Step-by-step explanation:
We first would start with the last thing, the $38.50 Lisa has left! From reading the word problem, we can tell that she had another $38.50 she spent on a radio.She spends $7.20 (ring) + $1.95 (battery) before this and gives her mom $30.
All of these are subtractions from the initial amount:
x - 1.95 - 30.00 - 7.20 - 38.50 = 38.50
x - 77.65 = 38.50
x = $116.15
Please give brainliest! It would really help!
solve for f(5). f(x)=x^2-2x
Answers
f(5)=25-10
f(5)=15
15!
Answer:
Exact form:
x = √2, −√ 2
Demi cal form:
x=1.41421356…, −1.41421356…
Sarah has a credit card balance of $9,450 with an APR of 17%. With her current budgeted payment, Sarah will be able to pay off this debt in 36 months. But Sarah’s best friend just invited her to spend two months in Europe with her in 9 months. Wanting to have her credit card balance paid off before she goes to Europe, Sarah decides to take on a second job. What additional monthly income will Sarah need in order to pay off her credit card in 9 months?
a.
$336.92
b.
$467.23
c.
$788.85
d.
$1125.77
Answers
Sarah needs an additional monthly income of $1125.77 to pay off her credit card in 9 months.
What is an expression?An expression contains one or more terms with addition, subtraction, multiplication, and division.
We always combine the like terms in an expression when we simplify.
We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.
Example:
1 + 3x + 4y = 7 is an expression.
3 + 4 is an expression.
2 x 4 + 6 x 7 – 9 is an expression.
33 + 77 – 88 is an expression.
We have,
Using the information given,
We can find the current monthly payment Sarah is making using the formula for the present value of an annuity:
[tex]PMT = PV \times r \times (1 + r)^n / [(1 + r)^{n - 1}][/tex]
where PV is the present value (balance), r is the monthly interest rate (APR/12), and n is the number of months (36).
PMT.
[tex]= 9450 \times 0.17/12 \times (1 + 0.17/12)^{36} / [(1 + 0.17/12)^{36} - 1][/tex]
= $338.48
To pay off the balance in 9 months, Sarah needs to increase her monthly payment.
Let's call this additional payment x.
Then, we have:
[tex]9450 \times 1.17^{9/12} = (338.48 + x) \times ((1 + 0.17/12)^{9 - 1}) / (0.17/12)\\[/tex]
Solving for x, we get:
x = $1125.77
Therefore,
Sarah needs an additional monthly income of $1125.77 to pay off her credit card in 9 months.
Learn more about expressions here:
https://brainly.com/question/3118662
#SPJ7
Evaluate 5 + {2[(48 – 40) ÷ 4 + (2 x 5)]}
29
28
45
19
Answers
Answer:
29
Step-by-step explanation: 5 + 2 [(48 - 40)/4+(2 x 5)]
What number comes after 2?
A. Red
B. 6-3
C. Orange
D. Joe Biden
Answers
Answer:
option b
6-3
which is 3
hope it helps
Answer:
number 3 comes after 2 put the full question if I got it wrong
What is the measure of the indicated central angle ? A. None of the above B. 20° C. 15° D. 10° E. 25°
Answers
Answer:
b
Step-by-step explanation: