Answers
Answer:
x^2=399+1
x^2=400
x=√400
x=+/-20
A. x=20 and x=-20
Answer:
x = 20 and x = -20
Step-by-step explanation:
I am a math expert. 20^2 and -20^2 are both 400 - 1 = 399.
Everything else is 397 or a wayyy higher number
Trust me the answer is x = 20 and x = -20
If im right, give me brainliest
Related Questions
Activity
Rylee shopped at a clothing store, where she spent $36.50 plus 8% tax. Then, she spent $25 to refuel her car at the gas station. Finally, she bought groceries worth $23.50. At the grocery checkout, she handed over a coupon for a 20% discount on her purchase.
Complete the following steps to help Rylee find the net change to her banking account balance.
Part A
Use decimal numbers to write an expression that represents the net change in Rylee’s bank account balance after paying for her purchase at the clothing store.
Part B
Write an expression that represents the net change in Rylee’s bank account balance after paying for fuel at the gas station.
Part C
Use decimal numbers to write an expression that represents the net change in Rylee’s bank account balance after paying for groceries.
Part D
Finally, use decimal numbers to write an expression that represents the net change in Rylee’s bank account balance for her entire shopping trip. Use your answers from parts A through C to guide you.
Part E
Simplify the expression in part D to find the net change in Rylee’s bank account balance. Express your answer as a decimal number.
Answers
Answer: The net change to her banking account balance is $83.22.
Step-by-step explanation:
Hi to answer this question we have to analyze the information given:
She spent $36.50 plus 8% tax. ( to calculate the tax amount we have to multiply the cost by the percentage in decimal form)
36.50 x (8/100) =$2.92 (value of tax)
Adding to the original cost
36.50+2.92 = $39.42
Then, she spent $25 to refuel her car at the gas station.
39.42 +25 = $64.42
She bought groceries worth $23.50. At the grocery checkout, she handed over a coupon for a 20% discount on her purchase
23.50 x (20/100) = 4.7 (amount of discount)
Subtracting to the purchase
23.50 -4.7= $18.8
Finally, adding to the total cost.
64.42 +18.8 = $83.22
The amount of gasoline at a gas station change from 58432.4 gallons to 56495.2 gallons from 2 o'clock p.m. to 4 o'clock p.m. what rational number represents the average change in amount of gasoline per hour
Answers
Answer:
thanks 4 the points
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
What is the correct proportion to find 22% of 86?
Answers
Answer:
its either 18.92
or 25.58%
but I believe it is 18.92 I may be wrong though
Write an Equivalent Expression by combining like terms for 2x+3x+y+2y
Answers
Answer:
5x+3y
Step-by-step explanation:
2x+3x=5x since they have the same variable.
y+2y
1y+2y u can put a 1 so that would be 3y
5x+3y
3. Simplify the following inequalities.
Answers
Answer:
7x+7 > 23-x
group like terms
7x+ x > 23-7
8x > 16
we divide both side by
8x > 16
8 8
so 8 cancelled out 8 living
x > 16
8
x > 2
8
we
Find the sum of 5x+20 and the opposite.write an equivalent expression in standard form justify each step
Answers
Answer:
Therefore, the sum of 5x+20 and the opposite is: 0Thus, the equivalent expression is:[tex]5x+20-\left(5x+20\right)=0[/tex]
Step-by-step explanation:
We know that the opposite is the additive inverse. For example, 8+(−8)=0 where 0 is the identity for addition.Given that we have to compute the sum of 5x+20 and the opposite.
Given
5x+20opposite of 5x+20 = -(5x+20)so
The sum of 5x+20 and the opposite:
5x+20 + -(5x+20)
Distribute the Negative Sign
[tex]=5x+20+-1\left(5x+20\right)[/tex]
[tex]=5x+20+-1\left(5x\right)+\left(-1\right)\left(20\right)[/tex]
[tex]=5x+20+-5x+-20[/tex]
Combine Like Terms
[tex]=5x+20+-5x+-20[/tex]
[tex]=\left(5x+-5x\right)+\left(20+-20\right)[/tex]
[tex]=0+0[/tex]
[tex]=0[/tex]
Therefore, the sum of 5x+20 and the opposite is: 0Thus, the equivalent expression is:[tex]5x+20-\left(5x+20\right)=0[/tex]
PLEASE HELP!!
What is the sum of the measures of the exterior angles of this triangle?
Answers
282
Step-by-step explanation:
C=180-112=68
A=180-68-51=61
sum of exterior angles=112+119+51=282
PLEASEEEEE IM DESPITE Xd-
Anyone
Will mark branliest
Answers
Answer:
B 8.42 seconds
Step-by-step explanation:
421 in 50 seconds
421//50
8.42 seconds
Hope this helps!
I don’t get this please help me
Answers
Answer:#1: 1225
#2: 1149
Step-by-step explanation:
Hope this helps! :) ❤❤❤
Graph the line
y = - 4/3x + 3
I need help with the steps.
Answers
Start by putting a dot at (0,3). Then you just need to go four down and three right from that dot and put another dot. Just repeat that a couple times to make sure it is straight, and connect the dots with a line. You can also go four up and three left from the (0,3) for the other side of the axis.
Step-by-step explanation:
First look at the y-intercept or b (in this case it is 3)
The y-intercept tells us where the line touches in the graph on the Y-axis
(In this case you move up in the Y-axis 3 times)
Put a dot on 3 (in the y-axis)
Now from 3 on the y-axis go down -4 and right 3 since the slope is -4/3
(Slope = rise/run -4 is rise [but since it the 4 is a -4 you go down] and 3 is run)
every time you finish going down -4 and right 3 place a dot on it and repeat if you think you can draw a line then stop and draw the line and you are finished
Answer: (This is in Desmos.com)
3. If Ted is making monthly payments of $77 on a loan of $4,000 for 5 years;
approximately what percent interest is he paying?
$
Answers
hope this helps
The percent of interest is he paying is,
⇒ R = 4.62%
What is mean by Percentage?A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.
To Calculate the percent of a number , divide the number by whole number and multiply by 100.
We have to given that;
Ted is making monthly payments of $77 on a loan of $4,000 for 5 years.
Hence, Yearly payments to pay is,
⇒ 12 × 77
⇒ $924
Hence, We get;
⇒ Interest = PRT/ 100
⇒ 924 = 4000 × R × 5 / 100
⇒ 92400 / 20,000 = R
⇒ R = 4.62%
Thus, The percent of interest is he paying is,
⇒ R = 4.62%
Learn more about the percent visit:
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Choose the one alternative that best completes the statement or answers the question
Answers
Answer:
whaat are you talking about coward
Help!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
D is the correct answer
Step-by-step explanation:
hope it helps
have a great day
:)
hellooooooooooooooooooooooooooooooooooo
Answers
Answer:
Step-by-step explanation:
Hi
Ten thousand place is how many times the value of thousand
Answers
Answer:
thousands
Step-by-step explanation:
it is in the thousands places
please answer fast! teehee
Answers
Answer:
y = 9
Step-by-step explanation:
∆KLH is congruent to ∆FLH by the Hypotenuse-Leg Congruence Theorem.
Therefore,
m<KHL = m<FHL
Thus:
6y = 4y + 18
6y - 4y = 18 (subtraction property of equality)
2y = 18
y = 18/2 (division property of equality)
y = 9
Answer: teeheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Step-by-step explanation:
Yo u soooo cool wannaaaaaa be be friends itsa song LOL..........
∠A and \angle B∠B are supplementary angles. If m\angle A=(3x-23)^{\circ}∠A=(3x−23)
∘
and m\angle B=(2x-12)^{\circ}∠B=(2x−12)
∘
, then find the measure of \angle B∠B.
Is 43
Answers
Answer:
74
Step-by-step explanation:
did school asignment
The measurement of ∠ B = 74°
What are Supplementary angles?Two Angles are Supplementary when they add up to 180 degrees.
Given that ∠ A and ∠ B are Supplementary and ∠ A = (3x−23),
∠ B = (2x−12)
According to definition of Supplementary,
∠ A + ∠ B = 180°
(3x−23) + (2x−12) = 180°
5x - 35 = 180°
5x = 180° + 35
5x = 215°
x = 43°
Putting x = 43° in ∠ B = (2x−12)
∠ B = (2*43−12)
∠ B = 86 - 12
∠ B = 74°
Hence, The measurement of ∠ B = 74°
For more references on Supplementary angles, click;
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Please find the percent of change rounding to the nearest tenth of a percent
Answers
Answer:
the answer is decreases
Simplify the following polynomial expression (8x^2-7x+2)+(3x^2-9x-6) help fasttt!!!!!!!!!!!!!
Answers
Answer:
11x^2 - 16x +4
Step-by-step explanation:
In order to simplify, add like terms
(8x^2-7x+2)+(3x^2-9x-6)
8x^2 + 3x^2 = 11x^2
-7x + -9x = -16x
-6 + 2 = 4
now the equation is 11x^2 - 16x +4
Find the value of 542x92+542
Answers
mark me brainliest if the answer is correct, thank you in advance :)
The original Volkswagen Beetle follows
a quadratic curve, write an equation if
the height is 5 feet long and the length
is 14 feet long. Show your work in the
sketchpads below.
Answers
Answer:
[tex]y= -\frac{5}{49}x^{2}+5[/tex]
Step-by-step explanation:
In order to solve this, we need to start by drawing a sketch of what the problem looks like (see attached picture).
From the picture, we can see that the graph of the equation should be a parabola with a vertex located at the point (0,5) and x-intercepts located at (-7,0) and (7,0) respectively.
So, there are two ways in which we can build a quadratic equation:
Standard form:
[tex]y=ax^{2}+bx+c[/tex]
or
Vertex form:
[tex]y=a(x-h)^{2}+k[/tex]
Since we already have the vertex and two points on the equation, we can directly use the vertex form. Where vertex is located at the coordinates (h,k)
So in this case: h=0 and k=5, which simplifies our equation a lot:
[tex]y=a(x-0)^{2}+5[/tex]
[tex]y= ax^{2}+5[/tex]
So we only need to find the value of a for our equation to be complete. We can use either x-intercept to find this. Let's use the point (7,0) so we get:
[tex]0=a(7)^2+5[/tex]
and now we can solve for a:
[tex]-5=49a[/tex]
[tex]a=-\frac{5}{49}[/tex]
so this completes our equation:
[tex]y= -\frac{5}{49}x^{2}+5[/tex]
whose graph looks like the one in the attached picture.
60 POINTS PLEASE SEND ME A COMPLETED COPY OF THIS "linear functions worksheet: child's growth and prosperity
Answers
Answer:
give it to me now and then I'll do it
Answer:
Step-by-step explanation:
Find the 64th term of the arithmetic sequence 2, -3, -8, ...
Answers
Answer:
-496
Step-by-step explanation:
minus 5
What is 4 2/3 divided by 7
Answers
Answer:
0.66666666666
4 2/3 = 14/3
7 = 7/1
Divide fraction = multiply by reciprocal
14/3 * 1/7 = 14/21 = 4/7
The answer is 4/7
whats in improper fraction equal to 9 and 3/5
Answers
Answer:
48/5
Step-by-step explanation:
Answer: 48/5
9 multiplied by 5 is 45. Add three to get 48
A bank received a check for two thousand, six hundred nine dollars and seventy -five cents. How is this written in expanded notation.
Answers
What numbers lie between 42 square root
Answers
Answer:
√ 42 lies between 6 and 7
Step-by-step explanation:
We know that √ 42 will lie between √ 36 and √ 49
And √ 36 = 6 ; √ 49 = 7
Hence we can be sure that √ 42 lies between 6 and 7
Which expression is equivalent to X
(13),
Ο Ο Ο Ο
4
x9
13
x 6
Answers
Answer:
x
Step-by-step explanation:
[tex]\huge \bigg( {x}^{ \frac{2}{3} } \bigg) ^{ \frac{3}{2} } \\\\
\huge= {x}^{ \frac{2}{3} \times \frac{3}{2} } \\\\
\huge= {x}^{ \frac{6}{6} } \\\\\huge= x \\ [/tex]
Which of the following represents the greatest percent of change?
A. Boots that were originally priced at $90 are on sale for $63
B. A baby that weighed 7 pounds at birth now weighs 10 pounds
C. A bracelet that costs $12 to make is sold for $28
D. A savings account increased from $500 to $600 in one year
Answers
Answer:
c
Step-by-step explanation:
a. 63(new) - 90(old) = -27 / 90 = 0.4285*100 = 42.9%
b. 10(new) - 7(old) = 3 / 7 = -0.3*100 = -30 = 30%
c. 28(new) - 12(old) = 14 / 12 = 1.166 * 100 = 116.6%
d. 600(new) - 500(old) = 100 / 500 = 0.2 = 20%
The greatest percentage change will be a bracelet that costs $12 to make and is sold for $28 as 133.33% thus option (C) is correct.
What is the percentage?The percentage is defined as a given amount in every hundred. It is a fraction with 100 as the denominator percentage is represented by the one symbol %.
The percentage is also called the indicating hundredths. Thus, 2% is two-hundredth, which means 2%=2/100=0.02.
As per the given,
% change = (change)/original x 100
A): (90 - 63)/90 x 100 = 30%
B): (10 - 7)/10 x 100 = 30%
C); (28 - 12)/12 x 100 = 133.33%
D):(600 - 500)/500 x 100 = 20%
Hence "The greatest percentage change will be a bracelet that costs $12 to make and is sold for $28 as 133.33%".
For more about the percentage,
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Suppose two $20 bills, three $10 bills, one $5 bill, and seven $1 bills are placed in a bag. If you were to pull a bill at random, what is the expected value for the amount chosen
Answers
Answer:
Assuming that the $1 bill was pulled at random, then the expected value of the amount chosen is [tex]\frac{7}{13}[/tex].
Step-by-step explanation:
From the given question, the bag contains;
$1 bill = 7
$5 bill = 1
$10 bill = 3
$20 bill = 2
Total number of bills in the bag = 13
Pulling a bill at random, the bills would have an expected value as follows:
For $1 bill, the expected value = [tex]\frac{7}{13}[/tex]
For $5 bill, expected value = [tex]\frac{1}{13}[/tex]
For $10 bill, expected value = [tex]\frac{3}{13}[/tex]
For $20 bill, the expected value = [tex]\frac{2}{13}[/tex]
Assuming that the $1 bill was pulled at random, then the expected value of the amount chosen is [tex]\frac{7}{13}[/tex].