Answer:
2x + 3y = 12 …equation 1
x– y = 1 … equation 2
To solve it by elimination method, let us multiply the second equation by 3
3x — 3y = 3 …equation 3
Now add the first and third equation
5x = 15
x = 3
From equation 2, y = x-1
y = 2
Hence x = 3, y = 2.
(b) 3x + y = 10
Since we have one equation and 2 variables, it cannot be solved by the elimination method.
To solve this, we can go for trial and error
Say y = 1, x = 3 or x = 5, y = —5
(c) x – 3y=1 …eq 1
3x – 2y + 4 = 0 …eq 2
Multiply eq 1 by 3, 3x — 9y = 3 …eq 3
Eq 2 — eq 3,
7y = —7
y = —1, x = —2 Ans
Hope it helps!!!!!!!brainliest pls!!!!!!!!!!!
There are 20 members of taekwondo club, 40 math club members, 60 drama
theatre members, and 30 members of science club. The researchers want to get 20
respondents out of these organizations. Identify the samples to be taken in each
organization.
⚘Refer to the attachment for solution!!~
The sample to be taken in each organization such as 2.6 in the taekwondo club, 5.3 in the math club, 8 in the drama club, and 4 in the science club.
Total members of taekwondo club = 20
Total members of math club = 40
Total members of drama club = 60
Total members of science club = 30
The researchers want to get 20 respondents out of these organizations.
What is the stratified sampling method?The stratified sampling method is the process of dividing members of data into homogenous subgroups before sampling.
The total number of members = 150
For taekwondo club
= Total members of taekwondo club /total number of members × 20
= 20/150 × 20
= 2.6
For math club
= Total members of math club/total number of members×20
= 40/150 × 20
= 5.3
For drama club
= Total members of drama club/total number of members × 20
= 60/150 × 20
= 8
For science club
= Total members of the science club/total number of members × 20
= 30/150 × 20
= 4
Therefore, The sample to be taken in each organization such as 2.6 in the taekwondo club, 5.3 in the math club, 8 in the drama club, and 4 in the science club.
Learn more about the stratified sampling method;
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What is the slope of the line passing through the points (-1, – 7) and (-9, - 2)?
» What is the slope of the line passing through the points (-1, – 7) and (-9, - 2)?
[tex]\color{brown} \mathbb{ANSWER:}[/tex][tex] \color{hotpink} \bold{(Slope) \: m = - \frac{5}{8} }[/tex][tex] \sf \:As \: a \: decimal: \color{hotpink} \bold{ \: m = - 0.625 }[/tex]— — — — — — — — — —
[tex] \color{darkblue} \mathbb{FORMULA:}[/tex][tex] \tt \: \underline{ \boxed{ \tt m = \frac{ y_{2} - y_{1}}{x_{2} - x_{1}}}} \\ [/tex][tex] \color{darkblue}\mathbb{GIVEN:}[/tex][tex] x_{ 1} = - 1\: \: \: \: \: \: \: y_{1} = - 7 \\ x_{2} = - 9 \: \: \: \: \: \: \: y_{2} = - 2[/tex][tex] \color{darkblue} \mathbb{SOLUTION:}[/tex][tex] \tt m = \frac{ y_{2} - y_{1}}{x_{2} - x_{1}} \\ [/tex][tex] \tt m = \frac{ ( - 2) - ( - 7)}{( - 9) - ( - 1)} \\ [/tex][tex] \tt m = \frac{ \: 5}{ - 8 \: } \\ [/tex][tex] \tt m = \underline{ \boxed{ \bold{ - \frac{ 5}{ 8 } }}} \\ [/tex][tex] \tt m = \underline{ \boxed{\bold{ - 0.625}}}[/tex]_______________❦︎_______________
Hcf of 32 and 48 pls
HCF/GCF 32 and 48
listing factor
32: 1, 2, 4, 8, 16, 32
48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
HCF: 16
prime factorization
32: 2 x 2⁴
48: 3 x 2⁴
HCF: 2⁴ = 16
In ΔUVW, the measure of ∠W=90°, VU = 41, UW = 9, and WV = 40. What is the value of the cosine of ∠V to the nearest hundredth?
Answer:
∠V = 12.68°
Step-by-step explanation:
In this question, we are tasked with calculating the value of the sine of ∠V to the nearest hundredth
Kindly note that since one of the angles in the triangle equals 90°, then we are dealing with a right-angled triangle.
PLEASE VIEW ATTACHMENT TO SEE THE DIAGRAM OF THE SHAPE
Mathematically, to calculate the sine of an angle in a triangle, the ratio to use is
Sine of an angle = length of side facing angle/length of hypotenuse = opposite/Hypotenuse
From the diagram, we can see that the length of the opposite is 9 while the length of the hypotenuse is 41
Sine V = 9/41
V = arcsin (9/41)
V = arcsin (0.2195)
V = 12.68° to the nearest hundredth
The value of the cosine of ∠V is 0.98
How to determine the value of the cosine of ∠V?The given parameters are:
∠W=90°, VU = 41, UW = 9,WV = 40The cosine of V is calculated using:
cos(V) = WV/VU
So, the equation becomes
cos(V) = 40/41
Evaluate
cos(V) = 0.98
Hence, the value of the cosine of ∠V is 0.98
Read more about right triangles at:
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Help me this I don't understand this one show work pls
Answer:
x = 1/2
Step-by-step explanation:
10^-3x * 10^x = 10^-2x = 10^-1
Order the fractions from least to greatest 3/5 1/3 and 1/8 and 7/8
Aliya has 125 stickers. Amari has twice
as many stickers as Aliya. How many
stickers does Amari have?
Answer:
250 stickers
Step-by-step explanation:
125 plus 125 is 250
Answer:
250 stickers because 125x2=250
The value of a share of stock decreases in value at a rate of $2.70 per hour during the first 6.5 hours of
trading. Enter and solve an equation to find the decrease in the value of the share of stock during that
time. Let x represent the decrease in value of the share of stock during 6.5 hours.
Answer: the awnser will be 17.55$
Step-by-step explanation: cause you multiply 6.5 x 2.70
Find the LCM and the GCF of 100 and 120.
Answer:
Step-by-step explanation:
LCM is least common multiple. It means the least multiple that both 100 and 120 have in common. 600 is the LCM. 20 is the GCF.
3 Which ordered pair is in the solution
set of the following inequality?
2x – 4y > 15
A (-8, -2)
B (3,4)
C (-4,0)
D (0,-4)
Answer:
D. (0,-4)
Step-by-step explanation:
When you plug in 0 into the x and -4 into the y variable you get 2(0)-4(-4)>15.
Then you solve and get 0+16>15.
then you at and get 16>15.
16 is greater than 15 which makes D correct
12.Identify the type of triangle
Answer:
a) acute triangle
b) obtuse triangle
c) right-angled triangle
d) equilateral
e) isosceles, right-angled triangle
Step-by-step explanation:
If all the angles in the triangle are less than 90°, it is an acute triangleIf one angle in the triangle is a right angle, then it is a right-angled triangleIf at least one angle is above 90°, it is an obtuse triangleIf all the sides of the triangle are equal, it is an equilateral triangleIf two sides of the triangle are equal, it is an isosceles triangleIf no sides of the triangle are the same length, it is a scalene triangleHope this helps!
Help with number 17 please
Answer:
B is the answer
Step-by-step explanation:
it goes downward if viewed left-right
y-3=4(x+2) solution for x and y please
Answer:
Solutions: (0,11) ; (1,15) ; (2, 19)
Step-by-step explanation:
y - 3 = 4(x +2)
y - 3 = 4x + 8
y = 4x + 8 + 3
y = 4x + 11
When x = 0 , y = 11 (0,11)
When x = 1 ; y = 4 +11 = 15 (1, 15)
When x = 2 ; y = 8 + 11 = 19 (2 , 19
Answer Pls I need this question
Answer:
T = 1.5
Step-by-step explanation:
If you count all the boxes with T in them there is 6 and if you divide 6 by 9 you get 1.5, 9 divided by 6 = 1.5
Hope this helps!
3x ^3- 12x^2- 15x = 0
factor and solve to find all the zeros
show all work
Answer:
x = 0 ; x = -1 ; x = 5
Step-by-step explanation:
3x^3-12x^2-15x=0
-> 3x(x+1)(x-5)=0
-> 3x = 0 or x+1=0 or x-5=0
-> x = 0; x = -1 ; x = 5
If x = 15 cm, y = 36 cm, and z = 39 cm, what is the surface area of the geometric shape formed by this net? A. 1,890 cm2 B. 2,880 cm2 C. 2,430 cm2 D. 738 cm2
Answer:
I belive it’s C
Step-by-step explanation:
I don’t know if it’s correct tell me if I’m wrong
Which interval notation represents the set of all numbers less than or equal to -6 or greater than or equal to -2
Answer: 1≤x<12
Step-by-step explanation:
The values that are greater than or equal 1 but less than 12 are values ranging from 1 to 11 i.e {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}. Note that 1 is included because the number is greater than or equal to 1 (1 included) and less than 12(12 not included).
x≥1 and x< 12
if x≥1, it means 1≤x
combining both inequality
1≤x and x<12
1≤x<12
The interval notation that represent the set S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} will be given as S = {x: 1≤x<12}
Question 1 of 5
Jenn's carpool ride has been late 6 days out of the past 20 days. What is the
estimated probability, based on relative frequency, that her ride will be late
tomorrow?
A. 70%
B. 40%
C. 60%
O D. 30%
SUBMIT
17. Observe the figure and name the following
a) Vertices of the polygon
b) Two pairs of adjacent sides
c) Two diagonals
d) Sides of the polygon
By using the image of the polygon and the definition for the parts, we can see that:
a) A, B, C, D, and E.b) DC and CB, AE and ED.c) AD, BEd) AB, BC, CD, DE, and EA.How to identify the parts of the figure?a) The vertices are the points where two sides connect, in this case, each letter represents a different vertex, so the vertices of the polygon are A, B, C, D, and E.
b) Adjacent sides are any pair of sides that are connected by a vertex.
For example, DC and CB are connected through vertex C, so these are adjacent sides.
Another pair can be BA and AE.
c) Diagonals are the segments between two non-consecutive vertices.
For example, E and D are consecutive vertices (because there are next to each other). And A and D are non-consecutive vertices.
Then AD is a diagonal. Another example can be EB.
d) The sides of the polygon are the segments between consecutive vertices, in this case, the sides are:
AB, BC, CD, DE, EA.
If you want to learn more about polygons, you can read:
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Jane has already run 6 miles this month. She plans to run an additional 2.5 miles per day.
At this rate, how long will it take Jane to run 41 miles?
if 5 is 1/4,what is the whole?
Answer:
20
Step-by-step explanation:
If 5 is 1/4, then multiply 5 by 4 to get 20
Hope this helps! :)
Have a blessed day and remember to keep smiling! :)
PLEASE MARK ME AS BRAINLIEST I REALLY WANT TO LEVEL UP
3. Barb wants to get 8 out of every 10 questions right on her test. If there are 35 questions on the
test, how many will Barb want to get right?
6. Rhombus (3 points)
A
N
I
a. If AN = 12, what is the measure of NT?
b. Diagonal AT intersects diagonal ZN at point M. If the mZZMT = 4x, what is the value of x?
c. Diagonal AT intersects diagonal Z N at point M. If the mZZAM = 3x + 2 and the
MZNTM = 8x - 90, what is the mZN?
Square (2 points)
Answer:
44 is my answer thank you please ask me questions a little bit easier and not reach the level I am still in jss2 class
Exercise 3.5. For each of the following functions determine the inverse image of T = {x ∈ R : 0 ≤ [x^2 − 25}.
1. f : R → R defined by f(x) = 3x^3
2. g : R+ → R defined by g(x) = ln(x).
3. h : R → R defined by h(x) = x − 9
a. The inverse image of f(x) is f⁻¹(x) = ∛(x/3)
b. The inverse image of g(x) is [tex]g^{-1}(x) = e^{x}[/tex]
c. The inverse image of h(x) is h⁻¹(x) = x + 9
The domain of TSince T = {x ∈ R : 0 ≤ [x^2 − 25} ⇒ x² - 25 ≥ 0
⇒ x² ≥ 25
⇒ x ≥ ±5
⇒ -5 ≤ x ≤ 5.
Inverse image of f(x)
The inverse image of f(x) is f⁻¹(x) = ∛(x/3)
f : R → R defined by f(x) = 3x³
Let f(x) = y.
So, y = 3x³
Dividing through by 3, we have
y/3 = x³
Taking cube root of both sides, we have
x = ∛(y/3)
Replacing y with x we have
y = ∛(x/3)
Replacing y with f⁻¹(x), we have
So, the inverse image of f(x) is f⁻¹(x) = ∛(x/3)
Inverse image of g(x)
The inverse image of g(x) is [tex]g^{-1}(x) = e^{x}[/tex]
g : R+ → R defined by g(x) = ln(x).
Let g(x) = y
y = ln(x)
Taking exponents of both sides, we have
[tex]e^{y} = e^{lnx} \\e^{y} = x[/tex]
Replacing x with y, we have
[tex]y = e^{x}[/tex]
Replacing y with g⁻¹(x), we have
So, the inverse image of g(x) is [tex]g^{-1}(x) = e^{x}[/tex]
Inverse image of h(x)The inverse image of h(x) is h⁻¹(x) = x + 9
h : R → R defined by h(x) = x − 9
Let y = h(x)
y = x - 9
Adding 9 to both sides, we have
y + 9 = x
Replacing x with y, we have
x + 9 = y
Replacing y with h⁻¹(x), we have
So, the inverse image of h(x) is h⁻¹(x) = x + 9
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.The world's tallest mammal is a giraffe at a height of 19 feet. What is the height of the giraffe in inches?????
Answer:
228 inches
Step-by-step explanation:
There are 12 inches in a foot.
19 × 12 = 228
Use the information given to answer the question.
The measures of angle QRS and angle SRT have a sum of 90∘.
Part A
Which statement about the relationship between angle QRS and angle SRT is true?The two angles are adjacent.
The two angles are adjacent.
The two angles are congruent.
The two angles are congruent.
The two angles are supplementary.
The two angles are supplementary.
The two angles are vertical angles.
hurry
Angles are the measures between two intersecting lines or rays
The relationship between angle QRS and angle SRT is the two angles are adjacent.
How to determine the relationshipThe given parameter is:
The sum of angle QRS and angle SRT = 90 degrees.
Complementary angles have a sum of 90 degrees.
This means that, angles QRS and SRT are complementary angles, and that can be adjacent angles
Read more about angles at:
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Answer:
Step-by-step explanation:
it's a
Piper invested $4,700 in an account paying an interest rate of 4.8% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest cent, would be in the account after 19 years?
Answer:
The answer to the nearest CENT is A= 11699.69
Step-by-step explanation: round to the nearest cent
[tex]~~~~~~ \textit{Continuously Compounding Interest Earned Amount} \\\\ A=Pe^{rt}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$4700\\ r=rate\to 4.8\%\to \frac{4.8}{100}\dotfill &0.048\\ t=years\dotfill &19 \end{cases} \\\\\\ A=4700e^{0.048\cdot 19}\implies A=4700e^{0.912}\implies A\approx 11699.69[/tex]
You spent $24 on baking ingredients, and you sell your cupcakes at a bake sale for $4 each. You sold 25 cupcakes. Did you make enough money to buy a $60 video game?
What is the area of the triangle?
(-5,6)
(1,3)
(-5,-3)
Answer:
27
Step-by-step explanation:
Base is 6 - (-3) = 9
height is 1 - (-5) = 6
so Area = 9 * 6/2 = 27
34
Which expression represents the phrase below?
3 fewer than a number, P
3-p
В
p=3
C
3 +p
D
P-3
Answer:
D) P - 3
Step-by-step explanation:
"fewer than" a number means "less than" a number. So "3 fewer than" means "subtract 3" from the number.
⇒ P - 3