Answer:
Width=75
length=105
Step-by-step explanation:
Width=x
length=30+x
= 7875=x*30+x
x^2+30x-7875=0
x^2+105x-75x-7875=0
x(x+105)-75(x+105)=0
What is the velocity of a car that’s traveled 306 kilometers northeast in 3.4 hours
Answer : -302.6
Step-by-step explanation:
A teacher randomly selects 10 out of her 30 students and finds that the mean height of those 10 students is 5′2". Is this a sample mean or a population mean, and which symbol would be used to denote it?
Answer:
Sample mean
Symbol: [tex]\frac{}{x}[/tex]
Step-by-step explanation:
Given
[tex]Population = 30[/tex]
[tex]Sample = 10[/tex]
[tex]Mean\ of\ the\ selected\ 10 = 5'2"[/tex]
Solving (a): Is it sample mean or population mean
From the question, we understand that 10 were selected from a total of 30.
And the mean of the selected 10 is 5'2"
The selected 10 is referred to as sample and the mean of the 10 is the sample mean
Solving (b): Symbol to use.
The symbol for sample mean is: [tex]\frac{}{x}[/tex]
Answer:
Step-by-step explanation:
its sample mean x just took the test.
Factorise 12x^2 + 8x^3
Answer:
The answer is 4x^2 (3+ 2x)
Step-by-step explanation:
Factor 4 x ^2 out of 12 x ^2 + 8 x ^3 .
hoped this helped!
brainly, please?
50 POINTS I WILL MARK BRAINLIEST PLZ HELP ITS TIMED
Clara’s teacher asked her to draw a polygon with vertices (–2, 4), (5, 4), (3, –3), and (–2, 0) and to identify the polygon. Clara drew the polygon below and identified it as a quadrilateral.
On a coordinate plane, a polygon is formed by points (negative 2, 4), (5, 4), (3, negative 3), and (negative 2, 0).
Which explains whether Clara is correct?
Clara drew the figure correctly and correctly identified the four-sided figure as a quadrilateral.
Clara drew the figure with the wrong coordinates, but she correctly identified the four-sided figure as a quadrilateral.
Clara drew the figure correctly, but she should have identified the figure as a pentagon.
Clara drew the figure with the wrong coordinates, and she should have identified the figure as a pentagon.
Answer:
The given polygon has 4 vertices and, 4 non-parallel and non equal sides. So the given polygon is a quadrilateral.
Step-by-step explanation:
The given vertices of are (–2, 4), (5, 4), (3, –3), and (–2, 0).
i found this on web
Answer:
The answer is A. Clara drew the figure correctly and correctly identified the four-sided figure as a quadrilateral.
Step-by-step explanation:
HELP! WILL GIVE BRANLIEST!
10 in each do 10 times 3 then subtract total
PLEASE HELP!!!
10 in.
A semicircular
window has a
radius of 10 in.
What is the area of
the window?
Answer:
area of window=1/2(πr²)=πr²/2=10²/2 π=50πinch²=50×3.14=157inch²
Please answer quickly 14 points for it :)
Answer:
0.65, 2.05, 2.56, 5.06, 5.62
Answer: 0.65, 2.05, 2.56, 5.06, 5.62.
original price: $148 discount: ? sale price: $125.80
Answer:
15 % off
Step-by-step explanation:
Discount = Original Price x Discount %/100
Discount = 148 × 15/100
Discount = 148 x 0.15
You save = $22.20
Final Price = Original Price - Discount
Final Price = 148 - 22.2
Final Price = $125.80
Help!! I’ll give u Brainly ASAP!
Answer:
-2, 4
Step-by-step explanation:
basically just move the dot the same distance on the other side
Evaluate the expression: 3a2 + 2b2 when a = -3 and b = 6
which word describes the slope of line ?
The height of a standard coffee cup
would be about
7 meters
B
7 kilometers
7 centimeters
D
7 millimeters
Answer:
7 centimeters
Step-by-step explanation:
Standard size of a coffee cup is 7 centimeters
7 meters is too big
7 kilometers is bigger than 7 meter
7 millimeters is too small
what is the answer to (x-1)+(2x+3) ?
Answer:
3x + 2
Step-by-step explanation:
Answer:
3x+2
Step-by-step explanation:
Get rid of the parentheses:
(x−1)+(2x+3)
x−1+2x+3
Add up the numbers:
x−1+2x+3
x+2+2x
Combine like terms:
x+2+2x
3x+2
There is an urn containing 10 marbles numbered 1 to 10. We sample 4 marbles without replacement. What is the probability that our sample contains the marbles labeled 1 and 2
Answer:
Step-by-step explanation:
The easiest way to do this is to assume you don't get a 1 or 2. You make your first draw from 8.
8 * 7 * 6 * 5 = 1680
The total number of ways of drawing 4 marbles is
10*9 * 8 * 7 = 5040
P(`(1 or 2) ) = 1680 / 5040 = 0.33333
The probability of getting a 1 or 2 in 4 throws = 1 - 0.3333 = 0.66667
Which of the following is the solution to the equation − 3 = 11? Group of answer choices
8
13
14
33
Answer:
Step-by-step explanation:
-3 = 11
= 11 + 3 = 14
14 is the correct answer
A blogger had 400 subscribers to her blog in January. The number of subscribers has grown by a factor of 1.5 every month since then. Write a sequence to represent the number of subscribers in the 3 months that followed.
Answer:
[tex]600, 900, 1350[/tex]
Step-by-step explanation:
Given
[tex]a = 400[/tex] -- initial subscribers
[tex]b = 1.5[/tex] -- growth factor
Required
Determine the number of subscribers in the next three months
To do this, we make use of:
[tex]y = ab^x[/tex]
In this case:
x is the number of months
y is the number of subscribers
So:
when x = 1;
[tex]y = ab^x[/tex]
[tex]y = 400 * 1.5^1[/tex]
[tex]y = 400 * 1.5[/tex]
[tex]y = 600[/tex]
when x = 2
[tex]y = 400 * 1.5^2[/tex]
[tex]y = 400 * 2.25[/tex]
[tex]y = 900[/tex]
when x= 3
[tex]y = 400 * 1.5^3[/tex]
[tex]y = 400 * 3.375[/tex]
[tex]y = 1350[/tex]
So, the next three number of subscribers is:
[tex]600, 900, 1350[/tex]
The table below shows the amount of money earned by two different workers over 5 consecutive days. Which equation best represents Fallon's earnings in terms of Donald's earnings? (How do you go from x to y?)
A. x = 7y
B. x = y + 7
C. y = x + 7
D. y = 7x
Answer:
Answer:C. y = x + 7
Step-by-step explanation:
everything on the left is 7 less then on the right
a hospital bill is estimated to be $480. It ends up actually costing the patient $524.50. What is the percent of error in the bill?
Answer:
8.48%
Step-by-step explanation:
Given that,
The estimated bill = $480
Actual costing of the bill = $524.50
We need to find the percent error in the bill. It can be calculated as follows :
[tex]\%=\dfrac{524.50-480}{524.50}\times 100\\\\\%=8.48\%[/tex]
So, the percentage error in the bill is 8.48%.
The ratio of tin to copper in an alloy is 6:9. How many kg of copper are there if the alloy has 32 kg of tin? Make a ratio table to solve.
Step-by-step explanation:
the three rows above you may draw as the ratio table
A pure sample of an unknown molecule has a mass of 0.03551
kg and contains 0.2000 moles.
What is the molecular weight of the substance?
g/mol
а
1.76 g/mol
b. 177.6 g/mol
с
17.755 g/mol
d 177.55 kg/mol
Answer:
177.6 g/mol
Step-by-step explanation:
The molecular weight of the substance is 177.55 g/mol.
Option B is the correct answer.
What is unit conversion?It is the conversion of one unit to another unit with its standard conversion.
Examples:
1 hour = 60 minutes
1 minute = 60 seconds
1 km = 1000 m
The molecular weight (MW) of the substance can be calculated by dividing the mass of the sample by the number of moles:
MW = mass/moles
MW = 0.03551 kg / 0.2000 moles
MW = 0.17755 kg/mol
However,
The answer is given in grams per mole, so we need to convert the result to g/mol.
So,
1 kg = 1000 g
MW = 0.17755 x 1000 g/mol
MW = 177.55 g/mol
Therefore,
The molecular weight of the substance is 177.55 g/mol.
Learn more about unit conversion here:
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is it complementary, supplementary, vertical, or none of the above? i need this right now!!!!
Answer:
d. None of these
Step-by-step explanation:
Hope it helps you in your learning process.
[tex] m\angle 1 + m\angle 2 + 90\degree = 360\degree [/tex]
[tex] m\angle 1 + m\angle 2 = 360\degree- 90\degree [/tex]
[tex] m\angle 1 + m\angle 2 = 270\degree [/tex]
Answer:
D. None of the above.
Step-by-step explanation:
Complementary are 90 degrees and supplementary are 180 degrees.
A full circle is 360 degrees, and since there is a right angle, that means that angle 1 and 2 make up 270 degrees total.
This means it is neither.
Jordan ran around a circular track with a diameter of 70 m. How far did Jordan run?
Answer:
Try your best! You can do it! I know you can! :) But sorry I can't help.
Step-by-step explanation:
Look at this expression.
-3xfy
x3y2
Which of the following is the simplest form of this expression?
OA
-3x²y2
ОВ. -3x?у?
Ос. -3°у?
OD. -3x® yo
Answer:
‐3×2y2 is the most common correct answer
what is the result of subtracting the secound equation from the first -4x-2y=-2 x-2y=9
Answer:
When we subtract the second equation x-2y=9 from the first equation 4x-2y=-2, we get the value of x = 11/5.
Therefore, the required result is:
x = 11/5
Step-by-step explanation:
Given
The first equation
[tex]-4x-2y=-2[/tex]
The second equation
[tex]x-2y=9[/tex]
Let us subtract the second equation from the first equation
[tex]-4x-2y=-2[/tex]
[tex]-[/tex]
[tex]\:\underline{x-2y=9}[/tex]
[tex]-4x - 2y - (x - 2y) = -2 - 9[/tex]
[tex]-4x -2y -x + 2y = -2-9[/tex]
[tex]-5x = -11[/tex]
divide both sides by -5
[tex]\frac{-5x}{-5}=\frac{-11}{-5}[/tex]
Simplify
[tex]x=\frac{11}{5}[/tex]
Thus, when we subtract the second equation x-2y=9 from the first equation 4x-2y=-2, we get the value of x = 11/5.
Therefore, the required result is:
x = 11/5
Carlos has a box of coins that he uses when playing poker
Number
with friends. The box currently contains 47 coins
Denomination of Coins Val
consisting of pennies, dimes, and quarters. The number of 0.01
pennies is equal to the number of dimes, and the total
value is $4.34. How many of each denomination of coin
does he have?
Answer:
d + 10d + 25q = 229.
Step-by-step explanation:
Please help me?! I don’t have a lot of time? Please I will give brainiest for the correct answer !
Answer:
It should be -3
Hope it helped i tried to help you ASAP
Step-by-step explanation:
Find the value of q which will make the quadratic expression 9x ^2-12x+q a perfect square
Answer:
The value of q that makes the expression a perfect square is q = 4.
Step-by-step explanation:
Perfect square:
A perfect square expression has the following format:
[tex](a - b)^2 = a^2 - 2ab + b^2[/tex]
In this question:
[tex]9x^2 - 12x + q[/tex] is a perfect square, we have to find the value of q.
First we have to find the value of a, looking at the equivalent formula above. So
[tex]a^2 = 9x^2[/tex]
[tex]a = \sqrt{9x^2}[/tex]
[tex]a = 3x[/tex]
Since the second term, which is -2ab, is -12x, we have that:
[tex]-2ab = -12x[/tex]
[tex]-2(3x)b = -12x[/tex]
[tex]-6xb = -12x[/tex]
[tex]6b = 12[/tex]
[tex]b = \frac{12}{6}[/tex]
[tex]b = 2[/tex]
q is b squared. So
[tex]q = b^2 = 2^2 = 4[/tex]
The value of q that makes the expression a perfect square is q = 4.
Supriya is writing a recursive function for the arithmetic sequence:
-11, -6, -1, 4,
She comes up with:
t(0)=-11
t(n)=t(n-1)+5
What domain should Supriya use for t so it generates the sequence?
A n≥0, is greater than or equal to, 0 where n is an integer
B n≥0, is greater than or equal to, 0 where n is any number
C n≥1, is greater than or equal to, 1 where n is an integer
D n≥1, is greater than or equal to, 1 where n is any number
PLZ i need this urgently
Answer:
A. n ≥ 0, is greater than or equal to, 0 where n is an integerStep-by-step explanation:
Given AP with the sequence:
-11, -6, -1, 4, ...and the recursive formula:
t(0)= -11 t(n) = t(n - 1) + 5Supriya used n = 0 as the start point, the following points are 1, 2, 3, ... and so on
Correct answer choice is A
Answer:
A) n > 0 where n is an integer
Step-by-step explanation:
what divided by 1/3 equals 6/7
Answer:
7/18
Step-by-step explanation:
Answer:
[tex]\frac{2}{7}[/tex]
Step-by-step explanation:
Let x represent the unknown number.
x ÷ [tex]\frac{1}{3}[/tex] = [tex]\frac{6}{7}[/tex]
To solve, we must multiply [tex]\frac{1}{3}[/tex] by [tex]\frac{6}{7}[/tex] .
[tex]\frac{1}{3}[/tex] * [tex]\frac{6}{7}[/tex] = [tex]\frac{2}{7}[/tex]
So, x = [tex]\frac{2}{7}[/tex]
Therefore, [tex]\frac{2}{7}[/tex] divided by [tex]\frac{1}{3}[/tex] equals [tex]\frac{6}{7}[/tex].
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do's and donts in handling measuring tools
Answer:
I need answer too
Pleaseee help us