Answer:
n=91
Step-by-step explanation:
(n×7)+2=100
n+9=100
-9 from both sides
n=91
18. Which student had the highest score?
Pls answer fast I will mark you brainliest
Answer:
Yes your answer is E with a total score of 89
The population of a certain bacteria colony can be modeled by the functionf(x)=x^2 , where x is the number of hours after the colony started. What will the population of the bacteria colony be after 12 hours?
Answer:
The answer is 24
Step-by-step explanation:
Since the population after x hours is 2x, then after 12 hours, we'll substitute x = 12 into the function.
The population becomes 2 x 12 = 24
What is the square root method? your own explained in words
Answer:
The square root is an inverse method of squaring a number. Hence, squares and square roots are related concepts. Suppose, x is the square root of y, then it is represented as x=√y or we can express the same equation as x2 = y. Here,'√'is the radical symbol used to represent the root of numbers.
Find P(5) when p = .38
Answer:
the answer is 1.9
Step-by-step explanation:
because I multiply.38×5
add 5x²y - 8xy² and -9xy² + 6x²y
A triangle is rotated 90° about the origin. Which rule describes the transformation?
(x, y) → (–x, –y)
(x, y) → (–y, x)
(x, y) → (–y, –x)
(x, y) → (y, –x)
Answer:
(x,y)→(y,-x)
Step-by-step explanation:
Given : A triangle is rotated 90 degrees about the origin.
To Find : Which rule describes the transformation?
Solution :
Knowing that:
90° rotation ( clockwise) is (x,y)→(y,-x)
~Lenvy~
The rule which describes the transformation is (x, y) → (–y, x).
What is Rotation?Rotation is a kind of geometric transformation where a figure or point is rotated by a certain degrees about a given point.
Given that,
A triangle is rotated 90° about the origin.
A point (x, y) when rotated 90 degrees about the origin results in the point (-y, x).
Here a triangle is rotated 90° about the origin.
Rule is,
(x, y) → (–y, x)
Hence the correct rule is (x, y) → (–y, x).
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Select the correct answer.
Solve the equation by completing the square.
0=x^2-14x+46
Answer:
[tex]x=7+\sqrt{3},\:x=7-\sqrt{3}[/tex]
Step-by-step explanation:
[tex]\mathrm{Switch\:sides}[/tex]
[tex]x^2-14x+46=0[/tex]
[tex]\mathrm{Solve\;wit\;Quadratic\;formula}[/tex]
[tex]x_{1,\:2}=\frac{-\left(-14\right)\pm \sqrt{\left(-14\right)^2-4\cdot \:1\cdot \:46}}{2\cdot \:1}[/tex]
[tex]\sqrt{\left(-14\right)^2-4\cdot \:1\cdot \:46}}{2\cdot \:1}=2\sqrt{3}[/tex]
[tex]x_{1,\:2}=\frac{-\left(-14\right)\pm \:2\sqrt{3}}{2\cdot \:1}[/tex]
[tex]\mathrm{Separate\:the\:solutions}[/tex]
[tex]x_1=\frac{-\left(-14\right)+2\sqrt{3}}{2\cdot \:1},\:x_2=\frac{-\left(-14\right)-2\sqrt{3}}{2\cdot \:1}[/tex]
[tex]\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}[/tex]
[tex]x=7+\sqrt{3},\:x=7-\sqrt{3}[/tex]
~Lenvy~
can you please help will mark BRAINLIEST
Answer:
E. -1, 0, 1, 2, 3, 4, 5, 6
Step-by-step explanation:
In the first inequality, n is greater than -2.
Meaning n= -1, 0, 1, 2, 3, ...
In the second inequality it was stated that n is less than or equal to 6. this means that n = 6, 5, 4, ....
Thus, n = -1, 0, 1, 2, 3, 4, 5, 6
50 people went to a play.
3/5 of the people stayed to the end.
How many people left?
The number of people left out of 50 will be 20.
What is an expression?Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Given that 50 people went to a play [tex]\dfrac{3}{5}[/tex] of the people stayed to the end.
The number of people stays is calculated as:-
[tex]\rm\ N = 50 \times \dfrac{3}{5}[/tex]
N = 10 x 3
N = 30
The number of people left is calculated as:-
⇒ 50 - 30
⇒20
Therefore, the number of people left out of 50 will be 20.
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What is the volume of the solid figure?
The solid shape is made up of two rectangular prisms. The first rectangular prism has a height of 10 inches, length of 5 inches, width of 5 inches and with connecting to the second rectangular prism, has a smaller height of 5 inches. The second rectangular prism has a length of 15 inches, height of 5 inches, width of 5 inches. The total length of the solid is 20 inches.
A.
625 in3
B.
750 in3
C.
800 in3
D.
1,250 in3
Answer:
A:
625 in3 I think
ok so I think coz I'm in 4rth
which confidence level would produce the widest interval when estimating the mean of a population based on the mean and standard deviation of a sample of that population? NO LINKS!!!
a. 99%
b. 80%
c. 95%
d. 90%
Explanation:
The larger the confidence level, the wider the confidence interval gets. Choice A provides the largest such confidence level.
It's like trying to catch an elusive fish. The wider the net, the more confident that you are likely to catch the fish. The size of the net can be a sort of measure of the confidence level.
The confidence level that would produce the widest interval when estimating the mean of a population based on the mean and standard deviation of a sample of that population is 99%.
Option A is the correct answer.
What is a confidence interval?A confidence interval is a statistical range that is used to estimate the true value of an unknown population parameter, such as a population means or proportion, based on a sample from that population.
The confidence interval provides a range of values that is likely to contain the true population parameter with a certain degree of confidence, which is typically expressed as a percentage.
We have,
The wider the interval, the lower the precision of the estimate, and the higher the confidence level, the wider the interval.
Therefore,
The confidence level that would produce the widest interval when estimating the mean of a population based on the mean and standard deviation of a sample of that population is 99%.
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John bought 2.5 kg of corn flour. He used 500g of it to make bread. What percentage of corn flour was left?
Answer:
75%
Step-by-step explanation:
2.5 kilograms=2500 grams
2500-500=2000g to find the percent you devide 500/2500 then you get the percentage that was taken away so to find the percentage that was left you minus the 25 percent from 100 which gives you the answer which is 75%
is it always true that (x+4) squared equals x squared plus 16?
Answer:
True
Step-by-step explanation:
(x + 4)² = (x + 4) (x + 4)
x² + 4² = x² + 16
Hello.
No, (x+4)² doesn't equal x²+16.
Let's see why.
Remember that
x times x = x²
4 times 4 = 4²=16
So it seems like (x+4)² is equal to x²+16.
However,
(x+4)²≠x²+16.
Well, what IS that equal to?
Turns out that
(x+4)² is equal to x² + twice the product of x and 4 +16 (!)
(x+4)²=x²+2*4*x+4²
(x+4)²=x²+8x+16
Therefore, (x+4)²=x²+8x+16.
I hope it helps.
Have an outstanding day. :)
[tex]\boxed{imperturbability}[/tex]
2.Which side describes a quadrilateral
a. 4-sided polygon
b. 3-sided polygon
c. 2-sided polygon
Answer:
Simple, 4 sided polygon
Step-by-step explanation:
Here is the vocabulary:
A quadrilateral is a 4 sided shape, the prefix "quad" is meaning 4
Ex: Squares, Rhombus, Rectangles
A Triangle is a 3 sided polygon. The prefix "tri" means 3 like a tricycle.
Ex: Equilateral, Scalene, Isosceles, or right triangles
2 sided polygon is a digon that isn't used lots in basic geometry. The prefix di means 2.
Ex: Few examples but a common one is digon.
A recipe requires 3/4 of a cup of water. Marley has 1 1/2cup measuring cup. How much of the measuring cup is filled with water?
Answer:
1/2 of the cup.
3/4 is half of 1 1/2.
Use the estimates to help you choose each correct answer. 14.8(20.7) = Estimate: 15(20) = 300 1.1(9.8) = Estimate: 1(10) = 10 72.5(4.9) = Estimate: 70(5) = 350
Answer:
1st 306.36 2nd 10.78 3rd 355.25
Step-by-step explanation:
bc i just skipped and it showed me the answers
Type the correct answer in the box. Use numerals instead of words.
Consider the function shown on the graph,
Y
8
6.
4
2
X
o
-10
8
8
10
-2
Complete the statements to make them true.
Domain: 1 2
Range: >
© 2022 Edmentum. All rights reserved.
Answer:
A function is an equation that has only one answer for y for every x. A function assigns exactly one output to each input of a specified type. It is common to name a function either f(x) or g(x) instead of y. f(2) means that we should find the value of our function when x equals 2. Example.
Step-by-step explanation:
The domain and range of the given function plotted on the graph is -
Domain : x ≥ -5
Range : y ≥ -2
Range of the function is the set of {y} - values that exist for a given value of {x} or for the existing domain of the function. As it can be seen from the graph that the {y} values range from -2 {included} to ∞ {excluded}. So, the range of the given function is [-2, 2).
Domain is the set of {x} values for which the function exist. We can see that the function values are in range [-5, ∞).
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Question 5
An investment of $45 earns 20% interest compounded annually for 3 years. How much is to worth?
O $90.90
O $77.76
O $9.83
O $113.73
Answer:
$77.76
Step-by-step explanation:
The future value formula is useful:
FV = P(1 +r)^t
FV = $45(1.20^3) = $45·1.728 = $77.76
. Ann ate 2 slices of a pizza and Teresa ate 3 slices of the pizza. The pizza had 8 slices. What is the difference in the amount of pizza that they ate written as a fraction?
A cube is sliced perpendicular to its base.
As
What is the shape of the resulting two-dimensional cross section?
circle
O trapezoid
square
Answer:
(c) square
Step-by-step explanation:
When a cube is cut perpendicular to its base and parallel to a face, the resulting cross section is a square. (see the first attachment)
__
Additional comment
If the cut is not parallel to a face, the resulting cross section is a rectangle. (see the second attachment)
Answer:
Square
Step-by-step explanation:
I took the test
I NEED help can somebody help me on this problem?
Answer:
I think w=5 not to sure though
One notebook sells for 89 cents Mary can buy a package of 12 notebooks for $9.60 how much money can Mary save on each notebook if she buys a package of 12
Answer:
One notebook = $18.50
One pen= $1.10
18.50+1.10= $19.60
2) We must first set up an algebraic expression
total=15 pencils
total=9 pens
The total amount is the price of one pencil*15
To figure out one pencil:
10 pencils is $24
1 pencil is $2.40
Total= $36
9 pens = 36
Therefore 1 pen is $4
Step-by-step explanation:
1) We need to set up an algebraic expression to solve this problem:
Let n= cost of a notepad
Let p= cost of a pen
First set up an expression for Cynthia's purchase:
cost of notepads*number of notepads + cost of pens*number of pens = total cost
n*2 + p*3 = 40.30
Rewrite as:
2n + 3p = 40.30
Next, set up an expression for Annie's purchase:
Here we will be using the same variables
Again:
cost of notepads*number of notepads + cost of pens*number of pens = total cost
n*3 + p*5 = 61
Rewrite as:
3n + 5p =61
Now, set up a system of equations:
2n + 3p = 40.30
3n + 5p =61
A system of equations can be solved several ways, here I will use the addition/elimination method
For this method one of the variables must be able to be eliminated
Step 1: Pick a variable to eliminate
Here I will eliminate n
Step 2: make the selected variables in the equations equal and opposite so that they cancel out when the equations are added together
(2n + 3p = 40.30)(-3)
(3n + 5p =61)(2)
-6n - 9p = -120.90
6n + 10p = 122
Step 3: add vertically
-6n - 9p = -120.90
6n + 10p = 122
p = 1.10
Step 4: Figure out the other variable by inputting the answer you just got back into the original equation
2n + 3(1.10) = 40.30
2n + 3.30 = 40.30
-3.30 37
2n = 37
/2 /2
n = 18.5
solve for x - 8(2x + 3x +2) = -4x +148
Answer:
x = -164/35.
Step-by-step explanation:
x - 8(2x + 3x +2) = -4x +148
x - 16x - 24x - 16 = -4x + 148
x - 16x - 24x + 4x = 148 + 16
-35x = 164
x = -164/35
Mina said the height of the parallelogram is 4 cm while
Jazmin said it was 5 cm. Who is correct? Explain your
reasoning.
The height is the distance between the opposite parallel sides of the parallelogram.
Therefore, the height of the parallelogram is 4 cm.
What is the area of this figure?
Enter your answer as a decimal in the box.
Answer: 137.5cm²
Step-by-step explanation:
See the attached image.
Can someone help please l
Answer:
x = 10
Step-by-step explanation:
DE = EF, GE = GE, m∠D = m∠F = 90°
so
ΔDGE = ΔFGE
then
3x + 8 = 5x - 12
3x - 5x = -12 - 8
-2x = -20
2x = 20
x = 10
Step-by-step explanation:
Since DE=FE, we know GE is angle bisectors of angle G.
Thus, set those two expressions equal to each other.
3x+8= 5x-12
20=2x
x=10
A bird sits on the branch of a tree, then starts to fly. The height of the bird is described by the function. y=0.6sin(pix/12)+35 where y represents the height of the bird measured in meters, and x represents the number of seconds since the bird left the branch.
Which function expresses y, the number of seconds since the bird left the branch, as a function of x, the height of the bird in meters?
Answer:
The answer is letter A
Step-by-step explanation:
Solve the quadratic equation by using the quadratic formula. If the solutions are not real, enter NA. 5x2−7x+1=0
Answer:
Step-by-step explanation:
a = 5, b = -7 c = 1
[tex]x=\frac{-b\pm\sqrt{{b^2-4ac}}}{2a}\\=\frac{-(-7)\pm\sqrt{{(-7)^2-4(5)(1)}}}{2(5)}\\\\=\frac{{7}\pm\sqrt{{49-20}}}{10}\\\\\\=\frac{{7}\pm\sqrt{{29}}}{10}\\\\[/tex]
so
[tex]x_1=\frac{7+\sqrt{29}}{10}\\x_2=\frac{7-\sqrt{29}}{10}[/tex]
if 2 newborn rabbits are put in a pen.How many rabbits will be in a pen in 1 year?
Answer:
It depends on the gender of those 2 newborn rabbits
Step-by-step explanation:
It seems that the answer is anywhere between 130 and 150
If sec(t) = -9.65, what is cos(-t)?
The value of cos(-t) from the given expression is -0.1036
Trigonometry identityGiven the trigonometry identity
sec(t) = -9.65
According to trig identity
sec(t) = 1/cos(t)
cos(-t) = cost
Hence;
cos(t) = -1/9.65
cos(t) = cos(-t) = -0.1036
Hence the value of cos(-t) from the given expression is -0.1036
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