The price of an item has dropped to $38 today. Yesterday it was $95. Find the percentage decrease.
Answer:
60% decrease
Step-by-step explanation:
Subtract to find how much money it went down by
95 - 38= 57
then use proportions
x/100 = 57/95
then cross multiply
5700 = 95x
60 = x
Please show steps, 100 points and Brainliest
Convert vertex form f(x)=(x+2)^2-25 to factored form.
Answer:
f(x)=x^2+4x-21
Step-by-step explanation:
Answer:
f(x) = (x + 7) (x - 3)
Step-by-step explanation:
f(x)=(x+[tex]2)^{2}[/tex]-25
(x + 7) (x - 3) we put the 2 x's because of the (x+2)^2
now the + 7 and - 3, multiply the 2 numbers = -21 then use those 2 in
(x+2)^2 to add for the answer = -25
What is the difference between simplifying radicals and estimating its value?
Answer:
Simplifying radicals is the process of manipulating a radical expression into a simpler or alternate form. Generally speaking, it is the process of simplifying expressions applied to radicals.
Estimation (or estimating) is the process of finding an estimate, or approximation, which is a value that is usable for some purpose even if input data may be incomplete, uncertain, or unstable. The value is nonetheless usable because it is derived from the best information available.
Step-by-step explanation:
The radical symbol represents the root of a number and is read as x radical n or the nth root of x.
What is a radical?The symbol " that expresses a number's root is known as radical, and it is read as x radical n or the nth root of x. The horizontal line that surrounds the number is known as the vinculum, and the number beneath it is known as the radicand. The index or degree is the number n written before the radical.
The process of transforming a radical expression into a simpler or alternate form is known as simplifying radicals. In general, it is the process of simplifying expressions that are applied to radicals.
Estimation (or estimating) is the process of determining an estimate, or approximation, which is a value that can be used for a specific purpose despite the fact that the input data may be incomplete, uncertain, or unstable. The value is still useful because it is based on the best available information.
To know more about radicals follow
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if x=-4 and y=3 what is the value of x-3y^2
a: -13
b: -31
c: -23
d: -85
Answer:
b -31
Step-by-step explanation:
Step-by-step explanation:
x-3y²4-3×3²4-27-23hope it helps
stay safe healthy and happy..Does anyone what to talk. I need someone to talk to pls.
Answer: Sure. HRU?
Step-by-step explanation:
Answer:
hey mama hyb ?
Step-by-step explanation:
A right triangle is removed from a rectangle to create the shaded region shown below. Find the area of the shaded region. Be sure to include the correct unit in your answer.
Answer:
57m2
Step-by-step explanation:
What is the range of the function y=^3√x+8
Answer:
It should be A
Step-by-step explanation:
Took the class a few months ago
A
Just took the quiz and got it right
Can someone answer this please
Answer:
I believe it is 14 mm, hope i helped
Can someone help me with this?! Its Math Ill give you 20 Points Thank you
Answer:
Look below
Step-by-step explanation:
1- translation
2- Reflection
3- Rotation
4- Rotation
Answer:
Hello!
It's hard to tell sometimes with out graph but here answers
1st one: Translation
2nd one: Reflection
I don't know for sure for the last 2 but heres what I think they are answer at your own risk THOUGH. 3rd one: None of these
4th one: Rotation
ANSWER PLEASE i need help i will mark brainliest
Answer:
let the two no. be x and y.
their sum
x+y=-11
x=-11-y.....[I]
and difference
x-y=41
x=41+y......[ii]
equating equation I and ii
we get
-11-y=41+y
-11-41=y+y
-52=2y
y=-52/2
y=-26
now
substituting value of y in equation I.
we get
x=-11-(-26)=-11+26=15
The two no. is 15 and -26.
Please help me with this
look at the image
Answer: A
Step-by-step explanation:
#[tex]GameOn[/tex]
Answer:
2) 50, 100, 30
Step-by-step explanation:
all angles of the triangle = 180
1. 40 + 90 = 130 + 60 = 190
2. 50 + 100 = 150 + 30 = 180
3. 120 + 30 = 150 + 20 = 170
4. 70 + 70 = 140 + 60 = 200
Arianna earns $15 for doing yard work for 3 hours. If Arianna charges at the same rate, how many hours will it take her to
earn $35? hours
Answer:
7 hours
Step-by-step explanation:
15 dollars +15 dollars 30 dollars=2 hours. 5 dollars left 15 divided by 3, 5 dollars. 3 divided by 3 = 1 so 1 hours is 5 dollars. My explaining is not good.
Answer: 7 hours
Step-by-step explanation:
She earns 5 dollars per hour because 5x3=15
and then you do 15x2=30
then 3x2=6
then just add 1 to 6
6+1=7
so there's your answer
7 hours
In contrast to cooperative hunting, which are benefits of herding only? Check all that apply.
a. foraging
b. reproduction
c. divison of labor
d. protection
e. aerodynamic efficiency
f. hydrodynamic efficiency
the answer is : a, b, d
Does anyone know how to
Solve this
Answer:
53.4 cm^2
Step-by-step explanation:
rhombus's have the same formula as a square (B*H)
8.9*6 = 53.4 cm^2
solve these equations, show all your work x/2=20
Answer:
x = 40
Step-by-step explanation:
x/2 = 20
x/2(2) = 20(2)
x = 40
Solve for the measure of x.
Answer:
Step-by-step explanation:
take 60 degree as reference angle
using sin rule
sin 60=opposite/hypotenuse
[tex]\sqrt{3}[/tex]/2=x/8[tex]\sqrt{5}[/tex](do cross multiplication)
2x=[tex]\sqrt{3[/tex] *8[tex]\sqrt{5}[/tex]
2x=8[tex]\sqrt{15}[/tex]
x=8[tex]\sqrt{15}[/tex]/2
x=4[tex]\sqrt{15}[/tex]
for y
using pythagoras theorem
h^2=p^2+b^2
(8[tex]\sqrt{5}[/tex] )^2=(4[tex]\sqrt{5}[/tex] )^2+b^2
320=80+b^2
320-80=b^2
240=b^2
[tex]\sqrt{240}[/tex] =b
4[tex]\sqrt{15}[/tex]=y
S(x)=5x+5
T(x)=_3x +4
The value of t(s(2))
Answer:
Step-by-step explanation:
This is a composite function, in which we will first evaluate the s function at a value of 2, then we will use that value in the t function.
s(2) = 5(2)+ 5 so
s(2) = 15. Now we evaluate the t function at 15:
t(15) = 3(15) + 4 so
t(15) = 49
30 points!!!!!! please help quick!!!
Answer: The first picture is A an the secund Picture is D
Step-by-step explanation:
i hope this help
What is the value of (5 2– 10) ÷ 5 × 2 3 ?
CORRECT ANSWER PLEASE?!!
Answer:
210
Step-by-step explanation:
(52-10)
42÷5
8.4×25=210
Answer:
BEODMASS
( 52 - 10 ) ÷ 5 × 23
42÷5 ×23
8.4 x 23
193.2
n is an integer and -1<n < 5
Write down all the possible values of n.
Answer:
0,1,2,3,4
Step-by-step explanation:
According to a recent study, the average American household spends $1,700 on clothing per year, with a standard deviation of $530. What percent of households spend less than $1170 per year, based on this data?
Answer:
$3,220
Step-by-step explanation:
Add
Question 16 of 98
In which pair do both decimals represent rational numbers?
O A. 9.0032812373025549382... and 0.12333...
B. 9.0032812373025549382... and 0.115
C. 0.115 and 0.12333...
D. 3.10382947305718274... and 0.123
SUBMIT
Answer:
C
Step-by-step explanation:
C. Since .12333 has a repeating character and .115 has a definitive end, they are both rational
The temperature of earth may be measured either by thermometers on the ground, which is an accurate but tedious method, or by sensors mounted in a space satellite, which is a less accurate method. Researchers wanted to estimate how big of the differences are between the two methods. Researchers selected 20 sites randomly and measured the temperatures by both methods for each site at the same time periods.
Required:
What statistical inference method is the most accurate to estimate the difference?
Answer:
Analysis of variance (ANOVA) is the most accurate to estimate the difference
Step-by-step explanation:
Analysis of variance (ANOVA) is the best statistical method that can be used to determine the systematic difference between the mean values of two given set of population in any random experiment
In this case the two set of populations would be the one in which temperature is measured by thermometers on ground and sensor mounted in a space satellite.
Explain the effect level of significance and sample size have on hypothesis testing results. Provide an example and explain how they might impact business decisions. In replies to peers, discuss whether you agree or disagree with the example provided and justify your response.
Solution :
The level of significance refers to the probability of the null hypothesis that may be rejected in the study by the observer. As the sample size increases, the p value also increases but the significance remains same. When the sample size increase and becomes large, the null hypothesis can be rejected more easily.
The business decisions are taken defending the significance level of the statistical validation in cases of uncertainty. Suppose the null hypothesis is the sales after the marketing campaigning remains same. The company will launch the marketing campaign when the confidence level is 95% so that after the campaign the sales will increase. It means that the significance level must be high enough for rejecting null hypothesis of sales post of the marketing campaign that remains same.
When the sample size increases, the sensitivity of hypothesis increases, and for a large sample, the hypothesis may be rejected even though it is true.
let f(x)=-2x-1 and g(x)=x^2+4 find (f o g) (1)
[tex]fog(x)=f(g(x)) \\ \\ \\ =2.(4-x^2)-1 \\ \\ \\ = -2x^2+7 \\ \\ \\ [/tex]
Very easy question whoever answers first and gets the answer right get 20 points. The problem is
[tex]27 \times 13[/tex]
Answer:
your answer is 351: )
Step-by-step explanation:
Have a great day ty!
To explain what 27 times 13 means, look at it as 27 added together 13 times. To get the answer, you could just write down the number 27, 13 times and then add the 27 numbers together.
If you have one of those old-fashioned handheld calculators, you can double check that the answer is 351 by pressing 27, then x, then 13, and then = to get the answer.
Answer:
[tex]351[/tex]
Step-by-step explanation:
[tex]27\times \:13[/tex]
Step 1: Line up the numbers; Multiply the top number by the bottom number one digit at a time starting with the ones digit (from right to left)
[tex]\begin{matrix}\space\space&2&7\\ \times \:&1&3\end{matrix}[/tex]
Step 2: Multiply the top number by the bolded digit of the bottom number
[tex]\begin{matrix}\space\space&\textbf{2}&\textbf{7}\\ \times \:&1&\textbf{3}\end{matrix}[/tex]
Step 3: Multiply the bold numbers; Carry 2 to the column on the left and write 1 in the result line
[tex]7\times \:3=21\\\\\frac{\begin{matrix}\space\space&2&\space\space\\ \space\space&2&\textbf{7}\\ \times \:&1&\textbf{3}\end{matrix}}{\begin{matrix}\space\space&\space\space&1\end{matrix}}[/tex]
Step 4: Add the carried number to the multiplication
[tex]2+2\times \:3=8\\\\\frac{\begin{matrix}\space\space&\textbf{2}&\space\space\\ \space\space&\textbf{2}&7\\ \times \:&1&\textbf{3}\end{matrix}}{\begin{matrix}\space\space&8&1\end{matrix}}[/tex]
Step 5: Multiply the top number by the bolded digit of the bottom number
[tex]\frac{\begin{matrix}\space\space&\textbf{2}&\textbf{7}\\ \times \:&\textbf{1}&3\end{matrix}}{\begin{matrix}\space\space&8&1\end{matrix}}[/tex]
Step 6: Multiply the bold numbers
[tex]7\times \:1=7\\\\\frac{\begin{matrix}\space\space&\space\space&2&\textbf{7}\\ \space\space&\times \:&\textbf{1}&3\end{matrix}}{\begin{matrix}\space\space&\space\space&8&1\\ \space\space&\space\space&7&\space\space\end{matrix}}[/tex]
Step 7: Multiply the bold numbers
[tex]2\times \:1=2\\\\\frac{\begin{matrix}\space\space&\space\space&\textbf{2}&7\\ \space\space&\times \:&\textbf{1}&3\end{matrix}}{\begin{matrix}\space\space&\space\space&8&1\\ \space\space&2&7&\space\space\end{matrix}}[/tex]
Step 8: Add the rows. Add zero for simplicity
[tex]\frac{\begin{matrix}\space\space&\space\space&2&7\\ \space\space&\times \:&1&3\end{matrix}}{\begin{matrix}\space\space&0&8&1\\ \space\space&2&7&0\end{matrix}}[/tex]
[tex]81 + 270 = 351[/tex]
Therefore 27 times 3 is 351
A) -198+(-32) ayuda porta
B)-99+(-12)
Answer:
A) -230
B) -111
Step-by-step explanation:
A negative plus a negative is a negative
- + - = -
Does anyone know how to simplify this expression? I know it has to do with properties of summation and special summation rules but I can’t quite figure it out.
============================================================
Explanation:
Let's expand this out up to say n = 6 terms
I'll write the summation in such a way that each (1/(k+1) - 1/k) grouping will get its own row. Each row has the same value of k.
If we plug in k = 1 through k = 6, but not evaluate just yet, we will have this:
1/(1+1) - 1/1
1/(2+1) - 1/2
1/(3+1) - 1/3
1/(4+1) - 1/4
1/(5+1) - 1/5
1/(6+1) - 1/6
All I've done so far is replace k with 1 through 6. Again, each row represents a different k value. Each row has the general format 1/(k+1)-1/k.
Let's simplify everything in the first column.
So the (1+1) turns into 2, the (2+1) turns into 3, and so on.
Doing that leads to...
1/2 - 1/1
1/3 - 1/2
1/4 - 1/3
1/5 - 1/4
1/6 - 1/5
1/7 - 1/6
Then note how we have the cancellations shown in the diagram below. The color coding shows how the terms pair up to cancel out. By "cancel out", I mean specifically that the fractions add up to 0. Eg: 1/2 + (-1/2) = 0.
Nearly everything cancels out. The only things left after the dust settles is the -1/1 in the first row and the 1/7 in the bottom row. This evaluates to 1/7-1/1 = 1/7 - 7/7 = (1-7)/1 = -6/7
If you were to try this with n = 7, then you should find that again nearly everything cancels but the fractions -1/1 and 1/8. Then 1/8 - 1/1 = -7/8.
For n = 8, you should end up with 1/9 - 1/1 = -8/9.
You can probably see the pattern.
A conjecture is that the answer is -n/(n+1). The general proof of this isn't too tricky. Simply follow the same ideas as mentioned above. Expand out a few terms and see how things cancel out. You'll find that everything cancels except for the -1/1 in the first row and the 1/(n+1) just one term before the very end. Then we can say:
1/(n+1) - 1/1
1/(n+1) - (n+1)/(n+1)
(1-(n+1))/(n+1)
(1-n-1)/(n+1)
-n/(n+1)
If we tried n = 6, then we find,
-n/(n+1) = -6/(6+1) = -6/7
which was the result we found earlier when we added the first n = 6 terms of this series. Trying out n = 7 should lead to -n/(n+1) = -7/8, and so on.
what shapes have 2 pairs of parallel sides? Choose all that arw correct.
Answer:
can we see the options please
Find the volume of the pyramid. v=
Answer:
240 mi^3
Step-by-step explanation:
Base area = length x width = 10 x 8 = 80 mi^2
V = (base area x height)/3 = (80 x 9)/3 = 240 mi^3