Answer:
She can earn $10 per week even if she does not knock on any doors
There are ‘n’ arithmetic means between 33 and – 3. If second last mean: second mean = 1: 5, find the value of n.
We know that:
There are n arithmetic means between the numbers 33 and -3
second last mean: second mean = 1:5
Using this, we can find that the value of n is 9.
Now let's see how we need to use the information.
"There are n arithmetic means between the numbers 33 and -3"
This means that we will have a sequence like:
33, a₁, a₂, ..., aₙ, -3
And by the given ratio, we know that:
aₙ₋₂:a₂ = 1:5
Also, because this is an arithmetic sequence we have:
a₁ = 33 + d
a₂ = 33 + d + d
aₙ ₋ ₂ = 33 + (n - 2)*d = -3 - 2*d
Because of the ratio, we will have that:
aₙ₋₂/a₂ = 1/5
We can replace what the left side by:
(-3 - 2*d)/(33 + 2*d) = 1/5
now we can solve this for d.
-3 - 2*d = (33 + 2*d)*(1/5)
5*(-3 - 2*d ) = (33 + 2*d)
-15 - 10d = 33 + 2d
-15 - 33 = 2d + 10d
-48 = 12d
-48/12 = -4 = d
So now we know that the value of d is -4.
Now we can use the equation
aₙ ₋ ₂ = 33 + (n - 2)*d = -3 - 2*d
to find the value of n:
33 + (n - 2)*d = -3 - 2*d
33 + (n - 2)*-4 = -3 - 2*-4
33 - 4n + 8 = -3 + 8
41 - 4n = 5
-4n = 5 - 41 = -36
n = 36/4 = 9
The value of n is 9.
If you want to learn more, you can read:
https://brainly.com/question/11559160
Answer:
Step-by-step explanation:
HI. just posted a question can u help me out pleas please
the area of a square is below. A= 40in^2 find the length of the side. round your answer to the nearest tenth
Answer:
6.3
Step-by-step explanation
Each side of a square is equal; therefore, to find the length of one side, we can find the square root of the area, which, rounded, is 6.3.
Answer:
a=A=40≈6.32456in
-2z-xy=x+7 solve for x
Answer:
[tex] - 2z - xy = x + 7 \\ x + xy = - 2z - 7 \\ x(1 + y) = - 2z - 7 \\ \\ x = \frac{ - 2z - 7}{1 + y} [/tex]
I hope I helped you^_^
what is the answer for 23/4 + -23/4 - -15/4 + 9/4
Answer:
[tex]-\frac{6}{4}[/tex]
Step-by-step explanation:
The first 2 numbers cancel, and -15/4+9/4 is the same as 9/4 - 15/4
Please mark me as brainliest if I am correct
Answer:
6
Step-by-step explanation:
In the equation, [tex]\frac{23}{4} + -\frac{23}{4} --\frac{15}{4} + \frac{9}{4}[/tex], we can see that [tex]\frac{23}{4} + -\frac{23}{4}[/tex] cancel each other out
This leaves us with [tex]--\frac{15}{4} + \frac{9}{4}[/tex]. The negatives "negate" themselves giving us [tex]\frac{15}{4} + \frac{9}{4} = \frac{24}{4}[/tex] or [tex]6[/tex]
Hopefully (some part of) this explanation makes sense (or at least somewhat). If this doesn't make sense, please tell me and I will try to make it more understandable as soon as possible.
It would help if you marked my answer as Brainliest, if I'm correct, so I can help even more people! (I would really appreciate it!)
If the length and width of a rectangle are tripled, the area of that rectangle will increase by what percentage? A) 9% B) 90% C) 450% D) 900%
A baker is building a rectangular solid box from cardboard to be able to safely deliver a birthday cake. The baker wants the volume of the delivery box to be 360 cubic inches. If the width of the delivery box is 3 inches longer than the length and the height is 4 inches longer than the length, what must the length of the delivery box be?
2 inches
5 inches
8 inches
9 inches
Answer:
5
Step-by-step explanation:
Solution is 8 in
Let´s call dimensions of the box
x the length of the boxy the width of the box andh the height of the boxAccording to the problem statement
y = x + 3 and h = 4 in
The volume of the box is:
V = x×y×h V = 360 in³
Then V = x × ( x + 3 ) × 4 ( by substitution of y as a function of x )
360 = x × ( x + 3 ) × 4
Simplifying by 4
90 = x × ( x + 3 )
90 = x² + 3x
We got a second degree equation, solving for x
x² + 3×x - 90 = 0
x₁,₂ = ( -3 ± √ (3)² + 4×90 )/2 ⇒ x₁,₂ = ( - 3 ± 19,21 )/2
x₁ ⇒ is a negative value x = - 11,1 so we dismiss such solution
x₂ = 16.21/2
x₂ = 8.1 in
rounding to the nearest integer number we get the value for the length f the box
x₂ = 8 in ⇒ x = 8 in
Note: In Brainly.com in search bar ask for cube dimensions
given: x+21=7(x+9)
Find: x^2+5x
Answer:
14
Step-by-step explanation:
x+21=7(x+9)
x+21=7x+63
-6x=42
x=-7
(-7)^2+5(-7)
=49+(-35)
=49-35
=14
find the determinant of 2P-3Q if P=(2/3-1/4) and Q=(2/0-3/5)
What is the percentage change from 305 to 395
Answer:
29.51%
Step-by-step explanation:
The change from 305 to 395 is the difference between the two numbers. So, it would be 395 - 305 or 90. Now, to find the percentage of change, we need to find what part of the original amount is the change. In other words, we would have to divide 90 by 305. By putting this in a calculator you get about 0.2951. To convert this decimal into a percent, we would multiply by 100 giving us 29.51%.
solve the equation -8(3x-1/4)=2(9-7x)
Answer:
x= - 8/5
Step-by-step explanation:
-24x+2=18-14x
-24x+14=18-2
-10x=16
x= - 8/5
I need 17-22 please!!
Answer:
17. Vertex R
18. line FG
19. line RS
20. no they aren't collinear but they are coplanar
21. yes they are collinear but they aren't coplanar
22. plane HEF, plane RPE and plane EPQ
The scale on a map shows that 200 miles is represented by 5 inches on a map which proportion can be used to find the distance of the map Xterra presents 50 miles
Answer:
gzhausiaoa
Step-by-step explanation:
hshshsshhehehehehhdhdhdhdhhdhdhdfhfh
what is the square root of 465
Answer:
The square root of 465 with one digit decimal accuracy is 21.5.
Step-by-step explanation:
√465 = 21.5
What is the definition of "coplanar" in geometry?
-1/3 + -3/8
How do I add these 2 fractions?
Answer:
-17/24
Step-by-step explanation:
[tex] - \frac{1}{3} + - \frac{3}{8} = - \frac{1}{3} - \frac{3}{8} = - ( \frac{1}{3} + \frac{3}{8} ) = - (\frac{8 + 9}{24} ) = - \frac{17}{24} [/tex]
Reasoning The midpoint of AB is on the
y-axis, and AB is parallel to the x-axis. Point A
is located in Quadrant III. Which quadrant
contains point B? Explain.
Answer:
B is in 4th quadrant.
Step-by-step explanation:
If mid point of AB is on x-axis then and A is in 3rd quadrant then B must be on the opposite side of A.Therefore it is in 4th
B is in fourth quadrant when AB is the midpoint on y axis
What is a quadrant with an example?An area enclosed by the x and y axes is known as a quadrant, and a graph has four of them.To clarify, the x and y axes divide the two-dimensional Cartesian plane into four quadrants.Quadrant I is in the upper right corner, while Quadrants II through IV are arranged from counterclockwise to clockwise.The x-axis (the horizontal number line) and the y-axis connect to divide the coordinate plane into four equal pieces in the cartesian system (the vertical number line).Due to the fact that each of these four areas takes up one-fourth of the entire coordinate plane, they are referred to as quadrants.If the center of AB is on the x-axis
A is in the third quadrant,
let two points ( -2, -2 ) in third quadrant .
then B must be on the side of A that is opposite from A.
B thus comes in fourth.
then points ( 2,-2 ) are in fourth quadrant .
Learn more about Quadrants here:
brainly.com/question/7196312
#SPJ2
Which of the following is an incorrect way to label the line in the diagram below
is this the line diagram?
and if it is it's HI the second answer.
because a line is named by either using two points on the line in capital letters with an arrow on the top or by using a lowercase letter.
the width of a rectangle is 2w and the length is (w+5) the perimeter is 40 inches what are the measurements of the rectangle
Width = 2w , Length = w+5 , perimeter = 40
Perimeter of rectangle = 2 (Length + Width)
P= 2 (L + w)
40 = 2 [ (w+5) + (2w) ]
40 = 2 ( 3w+5)
40= 6w +10
6w= 40 – 10
6w= 30
w = 30/6
w = 5
Width = 2w = 2(5) = 10
Length = w + 5 = 5+5 = 10
I hope I helped you^_^
An account pays 3.1% interest compounded quarterly.
Marson will make a regular deposit at the end of every 3 months, and wishes to reach a goal of $4500 after 3 years.
What is the amount of the regular deposit every 3 months?
$356.92
$349.39
$374.95
$359.29
Help ASAP
Determine the DOMAIN in interval Notation
Answer:
(-3,0)
[0,4]
Step-by-step explanation:
HCF of (a^3+b^3 ) & (a^4+a^2b^2+b^4)?
Answer:
a^2-ab+b^2
Step-by-step explanation:
factorize both of them.
Answer:
Step-by-step explanation:
Remember:
[tex]a^3+b^3=(a+b)(a^2-ab+b^2)\\[/tex]
[tex]a^3+b^3=(a+b)(a^2-ab+b^2)\\\\\\a^4+a^2b^2+b^4=a^4+2a^2b^2+b^4-a^2b^2\\\\=(a^2+b^2)^2-a^2b^2\\\\=(a^2+b^2-ab)(a^2+b^2+ab)\\\\HCF=a^2+b^2-ab\\[/tex]
-7 + 4m + 10 = 15 - 2m
what is m?
Find the value of x.
Answer:
x=70
Step-by-step explanation:
c would equal 80 because 80 is on the othwr side and 30 would transfer to the angle of D the you would add 80 and 30 and subtract it by 180 leaving you with 70
Which fraction is equivalent to 1/2 • 4/3 divided by 5/6 ?
I believe the answer you are looking for is 4/5.
Solution:
1/2 • 4/3=2/3
2/3÷5/6=2/3 • 6/5
4/5
you invested 5000 between two accounts paying 3% and 7% annual intrest. If the total intrst earned for the year was $310, how much was invested at each rate?
Answer:
The total interest of $320 will be the sum of the amount earned in each account.
Step-by-step explanation:
320 = x(0.04)(1) + (5000-x)(0.08)(1)
320 = 0.04x + 400 - 0.08x
-80 = -0.04x
2000 = x
5000 - x = 3000
$2,000 was invested at 4%
$3,000 was invested at 8%
Mr Daniel left some money to be shared between Ann aNd Annie in the ratio 5:7. If Annie had €45.00 more than Ann . Find each person’s share
Answer:
Ann = 112.5 and Annie = 157.5
Step-by-step explanation:
7-5 = 2
One share = 45/2 = 22.50
Ann = 22.5 x 5 = 112.50
Annie = 22.5 x 7 = 157.50
You can check this is correct my subtracting them from each other and confirming that Annie has 45 more dollars than ann
Hope this helps!!
8(x^2+2x-5)-3(2x^2-4x+3)
with shown work please
Which of the following is not an example of a perfect square? A)9,B)200 ,C)4, D)64
It's 200
Step-by-step explanation:
200 = 2 × 2² × 5²
Evaluate the expression.
0.2 ÷ -1×(0.6 – -0.4)
Write your answer as an integer or a decimal. Do not round.
pls help this is due tonight and i really need help
Is it [ -(–0.4) ] or (-0.4) did you solve it both ways if it was [–(–0.4) ] or (-0.4)
____o______o____
[tex]0.2 \div - 1 \times (0.6 - 0.4) \\ = - 0.2 \times (0.2) \\ = - 0.04[/tex]
_____o_____o_____
[tex]0.2 \div - 1 \times (0.6 - ( - 0.4)) \\ = - 0.2 \times (0.6 + 0.4) \\ = - 0.2(1) \\ = - 0.2[/tex]
I hope I helped you^_^
If using the method of completing the square to solve the quadratic equation x^2+8x+37=0, which number would have to be added to "complete the square"?
Answer:
The numbers are --> x = -4 + √21 i and x = -4 — √21 i
See the attachment for my step-by-step explanation
(solution is in red box)
The number that would have to be added in the given quadratic equation to complete the square is '-21' and this can be determined by using the factorization method.
Given :
Quadratic equation -- [tex]x^2+8x+37 = 0[/tex]
The following steps can be used in order to determine the number that would have to be added to complete the square:
Step 1 - The factorization method can be used in order to determine the number that would have to be added to complete the square.
Step 2 - Write the given quadratic equation.
[tex]x^2+8x+37 = 0[/tex]
Step 3 - Now, if '-21' is added in the above quadratic equation then the above equation becomes the complete square.
[tex]x^2+8x+37+(-21) = 0[/tex]
[tex]x^2+8x+16 = 0[/tex]
[tex](x+4)^2 = 0[/tex]
For more information, refer to the link given below:
https://brainly.com/question/17177510