Answers
Answer:
is this by any chance about simultaneous equations? If so,
Step-by-step explanation:
Step 1 is telling us to decide on whether x and y should be the unknown. For instance, you want x to be the unknown, so u solve for x.
Step 2 is telling us to write equations with x and y.
For example,
7x + 5y = 12
7x - 2y = 9
This may not be accurate but it is an equation.
Step 4 is telling us to check whether the solution is accurate or not. For instance, we say 7 is x. so we substitude 7 into the original equation to see whether the answer we found is correct.
For step 5, im not really sure.
hope this helps though???
Related Questions
A sequence of patterns is made from circular tiles and square tiles. Here are the first three patterns in the sequence: a) How many square tiles are needed to make Pattern Number 7? [2 MARKS] b) How many circular tiles are needed to make Pattern Number 20? [2 MARKS] c) When the pattern number is odd, the total number of tiles (SQUARE & CIRCULAR) needed to make the pattern: A - will always be even | B - will always be odd | C - could be even or odd | [2 MARKS] !! PLEASE ANSWER ALL OF THE QUESTIONS !!
Answers
The patterns of tiles do not follow an arithmetic sequence or geometric sequence
When the pattern number is odd, the total number of tiles (SQUARE & CIRCULAR) needed to make the pattern will always be odd
The square tiles needed to make Pattern Number 7?From the question, we have the following pattern:
Pattern 1: 1 square and 8 circlesPattern 2: 4 squares and 12 circlesPattern 3: 9 squares and 16 circlesThe number of square tiles is calculated using:
Tn= n²
So, we have:
T₇ = 7²
T₇ = 49
Hence, 49 square tiles are needed in pattern 7
The circular tiles needed to make Pattern Number 20The number of circular tiles is calculated using:
Tn= 4n + 4
So, we have:
T₂₀= 4 * 20 + 4
T₂₀= 84
Hence, 84 circular tiles are needed in pattern 20
c) The conclusion on odd pattern number
Using the computations in (a) and (b), we have:
The total number of tiles in odd pattern number is always odd
Read more about pattern and sequence at:
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16 + 40 ÷ 4 + (13 - 9)2
Answers
Step-by-step explanation:
= 16 + 40 ÷ 4 + ( 13 - 9 ) 2
= 16 + 40 ÷ 4 + 4 × 2
= 16 + 10 + 4× 2
= 16+ 10 + 8
= 34
Which outcome is most likely to occur along a transform boundary?
earthquakes
deep-sea trenches
rugged mountain ranges
hot spots
Answers
Answer:
The grinding action between the plates at a transform plate boundary results in shallow earthquakes, large lateral displacement of rock, and a broad zone of crustal deformation.
Step-by-step explanation:
It transform boundaries are where plates slide past each other causing friction, leading to earthquakes.
This is my answer absolute 100% correct
Hope it helps Favor(Brainliest)
#Carryonlearning
Find the surface area of the composite figure.
Answers
The Surface area of the figure is 520 square centimeters
How to calculate the surface area of a figureThe figure is made up of rectangular prisms
The formula for calculating the surface area of rectangular prism is expressed as:
SA = 2(lw + wh + lh)
l is the lengthw is the widthh is the heightSurface area of the figure = 2(2(8) + 2(14) + 8(14)) + 2(6(8) + 6(4) + 8(4))
Surface area of the figure = 2(16+28+112) + 2(48 + 24+32)
Surface area of the figure = 312 + 208
Surface area of the figure = 520 square centimeters
Hence the Surface area of the figure is 520 square centimeters
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Someone help me please
Answers
Step 1. Isolate the variable x:
[tex]3x-11 > 7x+9[/tex]
[tex]-4x > 20[/tex]
[tex]x > -5[/tex]
Step 2. Use the simplified inequality to graph:
Select an OPEN point on x = -5Select a ray extending from -5 to positive infinity (GREATER than -5)I hope this helps!
Carl is the owner of a shoe store and notices that his electricity bill has increased by 3%. Which of the expressions below represent a 3% increase?
1. a + 0.03a
2. a + 0.3a
3. 1.03a
4. 1.3a
expression 1 only
expression 2 only
expressions 1 and 3
expressions 2 and 4
Answers
Answer:
1 and 3
Step-by-step explanation:
Canada had 12,968,000 visitors while Mexico had 9,807,000 visitors. How many combined visitors did they have?
A. 22,775 visitors
B. 21,775,000 visitors
C. 22,765,000 visitors
D. 22,775,000 visitors
Answers
Answer: D
Step-by-step explanation: Add the two numbers
Find the area of the shaded region. Round your answer to the nearest tenth.
please help
Answers
Answer:
41.0 cm^2 to nearest tenth.
Step-by-step explanation:
Required area = Area of the semicircle - area of the clear triangle
Area semicircle = 0.5πr^2
= 0.5π *6^2
= 18π.
Finding Altitude h of the triangle :
cos 60 = h / 6
h = 6 cos 60 = 6 * 1/2
= 3.
Finding Base b of the triangle:
sin 60 = 0.5b / 6
0.5b = 6 * sin 60
= 5.196.
So area of the triangle = h * 0.5b
= 3 * 5.196
Area of shaded region
= 18π - 3 * 5.196
= 40.96 cm^2
Answer:
38.52 cm²
Step-by-step explanation:
Take the shaded area to be found into 2 parts :
Left sectorTop area subtended by the chordArea of left sector
As the area subtended by the chord takes up an angle of 120°, the remaining angle of the semicircle is :180° - 120° = 60°Area = πr² x (angle of sector)/360°Area = 3.14 x (6)² x 60/360Area = 3.14 x 36 x 1/6Area = 3.14 x 6Area = 18.84 cm²Area subtended by top chord
Area (120° sector) - Area (triangle)Area = πr² x θ/360 - 1/2bhArea = 3.14 x 36 x 120/360 - 1/2 x 6 x 6Area = 3.14 x 12 - 18Area = 37.68 - 18Area = 19.68 cm²Area (shaded)
Area (left sector) + Area (subtended by chord)18.84 + 19.6838.52 cm²Determine which postulate or theorem can be used to prove that ABC = DCB.
Answers
Answer:
I believe it is B
Step-by-step explanation:
it has somewhat some thing to do with the lines at BC it's had to put in words
The postulate or theorem can be used to prove that ΔABC ≅ ΔDCB is ASA.
The correct option is A.
What is Congruency?Congruency is a concept in geometry that refers to the equality of shape and size between two or more geometric figures. When two figures are congruent, it means that they have exactly the same shape and size, and their corresponding sides and angles are equal.
In ΔABC and ΔDCB
<BAC= <BDC (given)
<BCA= <DBC(given)
CB = CB (common)
So, by ASA criteria ΔABC ≅ ΔDCB.
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Suppose 140 geology students measure the mass of an ore sample. Due to human error and limitations in the reliability of theâ balance, not all the readings are equal. The results are found to closely approximate a normalâ curve, with mean 82 g and standard deviation 3 g. Use the symmetry of the normal curve and the empirical rule as needed to estimate the number of students reporting readings between 79 g and 85 g
Answers
Using the Empirical Rule, it is found that 95 students reported readings between 79 g and 85 g.
What does the Empirical Rule state?It states that, for a normally distributed random variable:
Approximately 68% of the measures are within 1 standard deviation of the mean.Approximately 95% of the measures are within 2 standard deviations of the mean.Approximately 99.7% of the measures are within 3 standard deviations of the mean.In this problem, considering that the mean is of 82g and the standard deviation is of 3g, readings between 79g and 85g are within one standard deviation of the mean, hence it will compreend 68% of the 140 readings, so the number of students is given by:
0.68 x 140 = 95.
More can be learned about the Empirical Rule at https://brainly.com/question/24537145
f(x)=x^2. What is g(x)?
Answers
f(x)=x²
f(1)=1²=1Hence.
g(x)=5f(x)g(x)=5x²Answer:
welp hopefully its right
Step-by-step explanation:
-1.5
15
- 10
-3
2
What is the arc measure of major arc CAD in degrees
Answers
Answer:
296°
Step-by-step explanation:
drake uses 9/4 cups of sugar to make 9 mugs of brownies how much sugar is required to make one brownie
Answers
Answer:
1/4 cup
Step-by-step explanation:
9/4 / 9 =
9/4 *1/9 the nines cancel out to leave
1/4
Find the number that makes the ratio equivalent to 5:6.
:66
Answers
Answer:
55 - you multiplied 6 by 11 to get 66 so you multiply by 5 by 11 to get 55.
WILL GIVE BRAINLIEST Graph the piecewise function
Answers
Answer:
Step-by-step explanation:
Pls help and explain it
Answers
Answer:
(a) School B
you can compare the coverages of A grades for both schools
School A: 25
School B: 50
50 > 25, so school B
(b) School B
School A: 18
School B: 70
70 > 18, so also school B
(c). School B has a higher percentage of nearly all the grades than school A except for D grade.
A box of macaroni is 5 inches long, ½ inch wide and 2 ¼ inches tall. What is the volume of the box?
Answers
Answer:
5.625 cubic inches
Step-by-step explanation:
Which function matches the graph?
A 2-dimensional graph with an x-axis and a y-axis is given. A parabolic curve is drawn whose axis of symmetry is parallel to y-axis and its vertex is at (1,-3); is passing through co-ordinates (3,1) and (-1,1).
A. f(x) = (x – 3)2 – 3
B. f(x) = (x + 1)2 – 6
C. f(x) = (x + 2)2 – 5
D. f(x) = (x – 1)2 – 3
Answers
vertex : (1,-3)
coordinates : (3,1) and (-1,1)
parabola formula : y = a(x -h)² + k
(x, y) - from the coordinates(h, k) - from the vertexso given,
h = 1
k = -3
x = 3
y = 1
solve for a:
1 = a(3 -1)² + (-3)1 = 4(a) - 34(a) = 4a = 1Therefore equation:
y = (x -1)² - 3
check the graph for confirmation:
Answer: Graph the parabola y=x2−7x+2 .
Compare the equation with y=ax2+bx+c to find the values of a , b , and c .
Here, a=1,b=−7 and c=2 .
Use the values of the coefficients to write the equation of axis of symmetry .
The graph of a quadratic equation in the form y=ax2+bx+c has as its axis of symmetry the line x=−b2a . So, the equation of the axis of symmetry of the given parabola is x=−(−7)2(1) or x=72 .
Substitute x=72 in the equation to find the y -coordinate of the vertex.
y=(72)2−7(72)+2 =494−492+2 =49 − 98 + 84 =−414
Therefore, the coordinates of the vertex are (72,−414) .
Now, substitute a few more x -values in the equation to get the corresponding y -values.
x y=x2−7x+2
0 2
1 −4
2 −8
3 −10
5 −8
7 2
Plot the points and join them to get the parabola
in short terms D.
Translate this sentence into an equation.
55 is the product of 5 and Mabel's height.
Use the variable m to represent Mabel's height.
Answers
Answer:
5 x m = 55
Step-by-step explanation:
This is because 55 is the product and this means multiplication and 5 x something is 55
What is the slope of a line that goes through the points (3, 7) and (8, 11)
Question 4 options:
11/7
5/4
−8/3
4/5
Answers
Answer:
5/4
Step-by-step explanation:
Since the formula of finding the slope is y2-y1/x2-x1, you plug ithe numbers into the equation which is 8-3/11-7 which equals 5/4.
A circle has a diameter with endpoints at -2 + i and -6 -11i. What is the center of the circle?
O-8-10i
O -4 – 5i
O -2- 6i
O 2 +i
Answers
Answer:
- 4 - 5i
Step-by-step explanation:
The centre of the circle is the average of the endpoints
centre = (- 2 + i - 6 - 11i ) ÷ 2
= (- 8 - 10i ) ÷ 2
= - 4 - 5i
PLEASE HELP IM SO CONFUSED
Which of the following is a solution for the inequality 2x < 9?
OX= 5.5
O x= 4.5
O x = 6
OX= 4
Answers
I think answer is 4
Step-by-step explanation:
I think so the answer is 4 because the questoin is 2x <9 2 time x =the answer and 2 times 4 = 8 and it is smaller than 9 and if we will do the same with the other numbers it will be greter than 9
solution:
2 x < 9
x = 4
2 × 4 = 8
and it is smaller than 9
like this :
8 < 9
this is what I think other wise I am not sure thankyou
Data collected from a survey of American teenagers aged 13 to 17
was used to estimate that 29% of teens believe in ghosts. This
estimate was based on data from 510 American teenagers. What is
the population that people carrying out the survey were interested
in?
O All people in the United States.
The 510 teens that were surveyed.
O All American teens who are between the ages of 13 and 17.
o The 29% of the teens surveyed who said they believe in ghosts.
Answers
Using sampling concepts, it is found that the population of interest is given by:
All American teens who are between the ages of 13 and 17.
What is sampling?It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.
For example:I want to estimate the proportion of New York state residents who are Buffalo Bills fans. So i ask, lets say, 1000 randomly selected New York state residents wheter they are Buffalo Bills fans, and expand this to the entire population of New York State residents.
In this problem, a sample of American teenagers aged 13 to 17 was taken, hence all American teenagers aged 13 to 17 is the population of interest.
More can be learned about sampling concepts at https://brainly.com/question/25122507
one student incorrectly obtain an answer4/3x10/1=40/3=13 1/3 and says 13 portions can be made explain what mistake that as made in the calculations.
Answers
Answer:
They did the multiplication incorrectly
Step-by-step explanation:
help please if you can thanks!
Answers
Answer:
The last option 8.5
Step-by-step explanation:
hope it helps
Keisha bought 4 books and 2 bookmarks at the library book sale. Each book cost $2.50. Each bookmark costs $1.95. Keisha paid with a $20.00 bill. How much change did she get?
A.$6.20
B.$7.20
C.$15.55
D.$6.10
Answers
Answer:
A= $6.10
Step-by-step explanation:
1 book = $2.50
4 books = $10.00
1 bookmark = $1.95
2 bookmarks = $3.90
3.90 + 10.00 = $13.90
20.00 - 13.90 = $6.10
what is the value of the expression 4y²-7y-6 when y=5
Answers
16y-7y-6
80-35-6
45-6
39
Which expression is equivalent to 5(4x+3)-2x?a 18x+15b 18x+3c 7x+8d 2x+8
Answers
Answer:
Which expression is equivalent to 5(4x+3)-2x?a 18x+15b 18x+3c 7x+8d 2x+8
A-18x+15
PLEASE ANSWER I WILL GIVE BRAINLIEST TO CORRECT ANSWER
Answers
Answer:
6x+4y=16
Step-by-step explanation:
2 ( 3x) + 2 (2y) = 2 (8)
6x + 4y = 16 <===== add this equation to the top equation to get
11x = 22
then x = 2 use this value of x in any of the equations to calculate y
5(2) - 4y = 6
10 - 4y = 6
-4y = -4
y = 1
.If Rashard wants to earn $300 interest in 2 years from an account that earns an annual simple
interest rate of 8%, how much must he invest initially?
Answers
Answer:
$ 1875
Step-by-step explanation:
Richard invests some amount P. He want the money he invested to gain an interest of $300.
A = P(1 + n×i)
A = P + 300
i = 0.08
n = 2
P + 300 = P(1 + 2×0.08)
P + 300 = P(1.16)
300 = 1.16P - P
300 = 0.16P
300/0.16 = 0.16P/0.16
P =300/0.16
P = $1875
Richard should invest $1875 if he wants an interest of $300 in 2 years.
