Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent, if necessary. 2/5 to 4/5
(please show your work if you can :D)
Answer:
Step-by-step explanation:
Increase
Increase = [tex]\dfrac{4}{5}-\dfrac{2}{5}=\dfrac{2}{5}[/tex]
Increase percentage = 2/5 out of 2/5 * 100
[tex]=\dfrac{2}{5}*\dfrac{5}{2}*100[/tex]
= 100 %
work out length of ac using cosine rule
Answer:
AC=14.8 cm
Step-by-step explanation:
AC^2=AB^2 +BC^2 -2(AB×BC×cos(ABC))
AC^2=7^2 +10^2 -2(7×10×cos(120))
AC^2=219
AC=sqrt(219)= 14.8 cm
[tex]4\left(5x-2\right)=2\left(9x+3\right)[/tex]
[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]
Sᴏʟᴜᴛɪᴏɴ Fᴏʀ Wᴇɪʀᴅ Tᴇᴇɴʏ ~
[tex] \qquad \sf \dashrightarrow \: 4(5x - 2) = 2(9x + 3)[/tex]
[tex]\qquad \sf \dashrightarrow \: 20x - 8 = 18x + 6[/tex]
[tex]\qquad \sf \dashrightarrow \: 20x - 18x = 6 + 8[/tex]
[tex]\qquad \sf \dashrightarrow \: 2x = 14[/tex]
[tex]\qquad \sf \dashrightarrow \: x = 14 \div 2[/tex]
[tex]\qquad \sf \dashrightarrow \: x = 7[/tex]
Therefore value of x is 7
By solving the linear equation, we will see that the solution is x = 7.
Solving a linear equation:
Here we need to solve the equation:
[tex]4*(5x - 2) = 2*(9x + 3)[/tex]
First, we should distribute the two products to get:
[tex]4*5x - 4*2 = 2*9x + 2*3\\\\20x - 8 = 18x + 6[/tex]
Now we move the terms with x to the left, and the terms without x to the right.
[tex]20x - 8 = 18x + 6\\\\20x - 18x = 6 + 8\\\\2x = 14\\\\[/tex]
Now we can divide both sides by 2 to get:
[tex]x = 14/2 = 7\\x = 7[/tex]
So the solution of the linear equation is x = 7.
If you want to learn more about linear equations, you can read:
https://brainly.com/question/4074386
Answer the value of x
Answer:
Step-by-step explanation:
(8-2)*180=1080 degrees
114+66+94+259+94+67+254+97+x=1080
1045+x=1080
1080-1045=x
x=35
Teresa is factoring this polynomial by grouping. Which common factors should be used in the next step of factoring? 10x3 3x2−20x−6 (10x3 3x2) (−20x−6) x2 and −2x 2x2 and −2x x2 and −2 2x2 and −2.
Answer:
−2=−2x^3
Step-by-step explanation:
10x3= 3x2−20x−6=(10x3⋅(3x2))(−20x−6)=−600x6−180x5x2=−600x6−180x5−2x⋅(2x2)=−4x3−2x⋅x2=−2x^3
−2=−2x3
2x^2=−2x^3
−2=−2x^3
Answer:
> The correct choice is C) x2 and −2
Step-by-step explanation:
> This is the only answer choice that makes sense in this equation.
In a class there are
8 students who play football and cricket
4 students who do not play football or cricket
14 students who play football
20 students who play cricket
find the probability that a student chosen at random plays football or cricket or both
Answer:
b
Step-by-step explanation:
Answer:
42/46 or 21/23 or about a 91.3% chance
Step-by-step explanation:
who can get these correct for me ?
Answer:
1. has solution x=-2 and goes in the left circle
2. has solutions x=-2 and x=5 and goes in the intersection between the two circles
3. has solution x=-2 and goes in the left circle
4. has solution x=5 and goes in the right circle
Step-by-step explanation:
Solve each equation by factoring
2x^2-12x-32=0
2(x^2-6x-16)=0
2(x+2)(x-8)
x=-2,x=8
Therefore, 1. has solution x=-2 and goes in the left circle
2x^2-6x-20=0
2 (x^2-3x-10) = 0
2(x-5)(x+2)=0
x=-2,x=5
Therefore, 2. has solutions x=-2 and x=5 and goes in the intersection between the two circles
3x^2+2x-8=0
(x+2)(3x-4)=0
x=-2, x=4/3
Therefore, 3. has solution x=-2 and goes in the left circle
3x^2-18x+15=0
3(x^2-6x+5)=0
3(x-1)(x-5)=0
x=1,x=5
Therefore 4. has solution x=5 and goes in the right circle
Please help me with this question Ty
Answer:
124.6
Step-by-step explanation:
27/x = 13/60, 13x = 1620, x = 124.6
Platon already has $50 but needs a total of at least $250 for his holiday. He gets paid $20 per day for delivering newspapers. How many days does he need to work to earn enough money for his holiday?
x=
Equation or Inequality:
Calculations to solve equation/inequality:
Interpretation of Solution:
Does your solution make sense?
Answer:
10 days
Step-by-step explanation:
So if he/she already has 50$ we are going minus that from 250 (250-50) then divide 200 by 20 and that equals to the total amount of 10 days
Pleaseee HELPP mee…… plzzzzzz
Answer:
OP/PN = LM/MN
Step-by-step explanation:
We can prove triangle ONP is similar to LNM due to Angle-Angle similarity. Now, OP to LM = PN to MN. OP/LM = PN/MN, OP/PN = LM/MN
What if the geometric mean of 21 and 84
Answer: i suggest you search it up
Step-by-step explanation:
Answer:
42
Step-by-step explanation:
let n = number of values
in this problem, n=2
now do 1/n to get:
1/2 = 0.5
Geometric Mean = (21 x 84)^0.5
= (1764)^0.5 which is the same as 1764^1/2 which is the same as [tex]\sqrt{1764}[/tex]
= 42
Guys pls kindly help me with this one I will brainlest the one with a serious answer please I need it right now this is rush please help people I badly need it
Hey there :)
An exact answer cannot be given as it requires to reseach about banks and co-operatives in your locality. However, I can give you a hint.
Research banks or cooperatives in your location that has the greatest percentage in terms of investment or savings.
Let's say, for example, Bank ABC has 5% annual simple interest in their Savings Account.
If you invest your entire money 100,000 pesos at Bank ABC with 5% annual interest for 20 years, you will earn an interest of:
[tex]Interest = Principal \times Rate \times Time[/tex]
[tex] = > Interest =100000 \times 0.05 \times 20yrs[/tex]
[tex] = > Interest = 100000[/tex]
Hence, after investing at Bank ABC for 20 years, you will earn 100,000 pesos on top of your principal/invested amount that is 100,000 pesos. Your money will become 200,000 pesos now.
So, with this, find a bank/cooperative that has the highest return rate in your location. Once you have decided bank/cooperative, research further with regards to the background of the company, other services offered, application requirements, etc.
~ Benjemin360
For 40 values of the variable x, it is given that E(x-c)² = 3099.2, where is a constant. The standard deviation of these values of x is 3.2.
(i) Find the value of E(x-c).
If c is a constant, then
E[X - c] = E[X] - E[c]
… = E[X] - c
and
E[(X - c)²] = E[X² - 2cX + c²]
… = E[X²] - 2c E[X] + E[c²]
… = E[X²] - 2c E[X] + c²
Recall the definition of variance:
Var[X] = E[(X - E[X])²]
… = E[X² - 2X E[X] + E[X]²]
… = E[X²] - E[2X E[X]] + E[E[X]²]
… = E[X²] - 2E[X] E[X] + E[X]²
… = E[X²] - E[X]²
The standard deviation of X is 3.2, so Var[X] = 3.2² = 10.24.
By this definition,
Var[X - c] = E[(X - c)²] - E[X - c]²
but again because c is constant,
Var[X - c] = Var[X]
This is because
Var[X - c] = E[(X - c)²] - E[X - c]²
… = E[X² - 2cX + c²] - (E[X] - E[c])²
… = E[X²] - 2c E[X] + E[c²] - E[X]² + 2 E[X] E[c] - E[c]²
… = (E[X²] - E[X]²) - 2c E[X] + E[c]² + 2c E[X] - E[c]²
… = Var[X]
Then
10.24 = 3099.2 - E[X - c]²
⇒ E[X - c]² = 3088.96
⇒ E[X - c] = 55.5784
in slope intercept what do i do if the x and y are both negative
Brenton is a phone specialist who makes 33,00 per year plus an 8$ fee for each sale he makes. if brenton makes 15 sales per week. what are his annual earnnings
Answer:
$39,240
Step-by-step explanation:
a = annual earnings
a = 33000 + 8(15)
a = 33000 + 8(15)(52)
a = 33000 + 6240
a = 39240
I know how to do this but not with the fraction in it
Solve for x.
2/5(x−1/2)=−2 3/4
Enter your answer as a mixed number in simplest form by filling in the boxes.
x =
Answer:
x = -3.25
Step-by-step explanation:
2/5 = 0.4
0.4x - 0.2 = -2(3/4)
-2(3/4) = -2/1 * 3/4 = -6/4
0.4x - 0.2 = -6/4
Convert to fraction
2/5x - 1/5 = -6/4
Add 1/5 to both sides
-6/4 + 1/5 = -30/20 + 4/20 = -26/20
2/5x = -26/20
Convert to decimal
0.4x = -1.3
-1.3/0.4 = -3.25
x = -3.25
a student takes several measurements. how can the student determine which measurement is the least percise?
its for a test!!
ALGEBRA I PROBLEM!
Use elimination to solve.
3x-30=y
7y-6=3x
will give brainliest
tysm:)
Answer:
x=12
y=6
Step-by-step explanation:
Let's first start by moving x and y to one side (I prefer having both variables on the same side and the other number on the other side):
3x-y=30
-3x+7y=6
Add the equations to eliminate x
6y=36
Divide both sides by 6
y=6
3x-30=6
Add 30 to both sides
3x=36
Divide both sides by 3
x=12
(x,y)=(12,6)
7. Evaluate f(x) = 0.75x + 10 for x = -4
Answer:
7 is the answer
Step-by-step explanation:
.75 * -4 + 10 = -3+10 = 7
The price of an item yesterday was $180. Today, the price rose to $441. Find the percentage increase.
Answer:
245% Increase
Step-by-step explanation:
1) Divide the price of the following day by the previous one.
441/180 = 2.45
2) Multiply by 100 to convert from decimal to percentage.
2.45 * 100 = 245%
3) There was a 245% increase in the price of an item from yesterday to today.
11. Mr. Flanagan is planning to build a garden at the school for the biology classes. The area of the school where it will be built is rectangular with dimensions of 180 feet by 1200 feet. He is planning to designate part of the area to plant the garden. The garden will be a similar rectangle, using a scale factor of; How much fencing will he need if he wants to enclose the garden on all four sides? He will need feet of fence.
Answer:
180 X 2 + 1200 X 2= YOUR ANSWER
Step-by-step explanation:
I can't give you your answer but I hope this helps PLEASE MARK ME AS BRAINLIEST
Answer:
2760
Step-by-step explanation:
first you do 180x2 then 1200x2 and once you got both of those numbers you add them togeterr so 360+2400=2760
11/12 x 2/3 I need an answer
Answer:
11/18
Step-by-step explanation:
11/12 x 2/3
11*2/12*3
22/36
11/18
Write a linear equation in Slope-Intercept Form that is parallel to a line containing the points: (2,7) and (4,11)
A- y=-2x+9
B- y= 2x-8
C- y=-4x-9
D- y=4x+3
y = 2x-8
========================================================
Explanation:
Let's find the slope of the line through (2,7) and (4,11).
[tex](x_1,y_1) = (2,7) \text{ and } (x_2,y_2) = (4,11)\\\\m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\m = \frac{11 - 7}{4 - 2}\\\\m = \frac{4}{2}\\\\m = 2\\\\[/tex]
The slope is 2.
Any line parallel to this current line will have the same slope, but different y intercept.
Choice B has the same slope (2), so this is why it's the final answer.
If using the method of completing the square to solve the quadratic equation x2 + 3x - 17 = 0, which number would have to be added to complete the
square"?
Answer:
Step-by-step explanation:
To solve using completing square, we need to write the equation as x2+3x=17.
The next step is to add a number such that the square can be completed. The number must be equal to (b/2a)^2, so here it will be (3/2)^2 = 9/4
The equation then becomes x2+3x+(9/4)=17+(9/4).
Solving it further will get you the final answer
8203 divided by 31 with remainder!!!
When 8203 is divided by 31 then the quotient is 264 and remainder is 2.
To divide 8203 by 31 and find the quotient with remainder, you can use long division.
8203 is the dividend.
31 is the divisor.
264
___________
31 | 8203
- 793
_______
273
- 248
______
250
- 248
______
2
The quotient is 264, and the remainder is 2.
Therefore, 8203 divided by 31 is 264 with a remainder of 2.
To learn more on Division click:
https://brainly.com/question/21416852
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6) The exterior angle to the vertex angle of an isosceles triangle has measure 250. What is
the measure of each base angle of the triangle?
Answer:
12.5°
Step-by-step explanation:
In any triangle, an exterior angle is the sum of the remote interior angles.
The exterior angle at the vertex angle of an isosceles triangle will be the sum of the two congruent base angles. Hence, each base angle is half the value of the exterior angle.
25° = 2b
b = 25°/2 = 12.5° . . . . the measure of each base angle
Find the inverse function in slope-intercept form (mx+b):
f(x)=-x+12
Answer:
12 - x
Step-by-step explanation:
y = -x + 12
Replace x with y.
x = -y + 12
Solve for y, x = -y + 12
= 12 - x
Hope this helps, please mark brainliest if possible. :)
Use the formula given to solve all those 3 please ASAP!!!
Answer:
look down
Step-by-step explanation:
where is it?
Im not seeing a thing
solve pls brainliest
Answer:
[tex]\frac{2}{3}[/tex]
Step-by-step explanation:
[tex]\frac{14}{15} -\frac{4}{15} =\frac{10}{15}[/tex]
[tex]Simplify[/tex]
[tex]\frac{2}{3}[/tex]
