Answers
Answer:
(1, 7)
x = 1
y = 7
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDASEquality PropertiesAlgebra I
Solving systems of equations using substitution/eliminationStep-by-step explanation:
Step 1: Define systems
-5x + 2y = 9
y = 7x
Step 2: Solve for x
Substitution
Substitute in y: -5x + 2(7x) = 9Multiply: -5x + 14x = 9Combine like terms: 9x = 9Isolate x: x = 1Step 3: Solve for y
Define original equation: y = 7xSubstitute in x: y = 7(1)Multiply: y = 7Answer: x = 1 and y = 7
Step-by-step explanation:
first you substitude y for 7x
-5x + 2(7x) = 9
then you distribute
-5x + 14x = 9
then you combine like terms
9x = 9
then you divide both sides by 9
x = 1
then you subsitute the x value in the other equations
y = 7(1)
meaning y = 7
Related Questions
Andre and Alina are each saving money. Andre starts with $100 in a savings account and adds five dollars per week Elena starts with $10 in her savings account and add $20 each week after how many weeks for Andre and Elena have the same amount of money in their savings account
Answers
Answer:
6 weeks
Step-by-step explanation:
From the question:
Let us represent the number of weeks as x
Andre and Alina are each saving money.
For Andre:
Andre starts with $100 in a savings account and adds five dollars per week
$100 + $5 × x
= 100 + 5x
For Elena
Elena starts with $10 in her savings account and add $20 each week
$10 + $20 ×x
= 10 + 20x
The next step is to equate both algebraic expression for Andre and Elena together
Hence:
100 + 5x = 10 + 20x
Collect like terms
100 - 10 = 20x - 5x
90 = 15x
x = 90/15
x = 6 weeks
Hence, after 6 weeks Andre and Elena would have the same amount of money in their savings account.
2/3=6/? means
2*6=3*?
2*3=6*?
2*?=3*6
2*?=3*?
Answers
Answer:
2/3 = 6/9
Step-by-step explanation:
2 x 3 = 6 so then you have to multiply 3 with 3 which is 9. (because the numerator and denominator should be multiplied by the same number.)
So thats why 2/3 = 6/9 is correct.
isac walks 6/10 of a mile in 1/5 of an hour if his rate remains constant what is isac walking rate in miles per hour
Answers
Answer:amazing
Step-by-step explanation:
Write the equation in slope intercept form of the line between the points (2,4) (6,-8) simplify your answer as much as possible.
Answers
Answer: Answer And explanation in picture
Step-by-step explanation:
It is given that p varies inversely as q. If p = 12 and q = 45 find p, if q is 135.
Answers
Answer:
[tex]p =4[/tex]
Step-by-step explanation:
Given
Variation: Inversely
[tex]p = 12[/tex] when [tex]q = 45[/tex]
Required
Determine p when [tex]q = 135[/tex]
First, we need to determine the relationship between p and q
Since, it is an inverse variation.
The relationship is:
[tex]p\ \alpha\ \frac{1}{q}[/tex]
Convert to an equation
[tex]p= k *\frac{1}{q}[/tex]
[tex]p= \frac{k}{q}[/tex]
Where k = constant of variation
Make k the subject
[tex]k = p * q[/tex]
When [tex]p = 12[/tex] and [tex]q = 45[/tex]
[tex]k = 12 * 45[/tex]
[tex]k = 540[/tex]
To solve for p when q = 135
Substitute 135 for q and 540 for k in [tex]p= \frac{k}{q}[/tex]
[tex]p = \frac{540}{135}[/tex]
[tex]p =4[/tex]
I keep confusing myself trying to solve this
Answers
Answer:
No
Step-by-step explanation:
Each separate line could be part of a different plain.
Answer:
If two distinct planes intersect, then their intersection is a line. Through any two points, there is exactly one line. If two points lie in a plane, then the entire line containing those points lies in the plane.
Step-by-step explanation:
sue has 2 cats.
each cat eats 1/4 of a tin of cat food each day
sue buys 8 tins of cat food
has sue bought enough cat food to feed her 2 cats for 14 days?
Answers
8x+5=61 immma workk out fo yall
-5 -5
8x =56
Answers
Answer:
x = 7
Step-by-step explanation:
8x + 5 = 61
8x = 56
x = 7
Based on the housing data below, use linear regression to estimate a fair price for a 1900 ft2 home. Square Feet House Price (in thousands) 1400 1700 105 135 1500 183 O A. $140,000 B. $156,000 C. $160,000 D.- $176,000
Answers
The solution is Option D.
The fair price of a 1900 ft² home is given by the equation A = $ 176,000
What is an Equation of a line?
The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept
And y - y₁ = m ( x - x₁ )
y = y-coordinate of second point
y₁ = y-coordinate of point one
m = slope
x = x-coordinate of second point
x₁ = x-coordinate of point one
The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Given data ,
Let the square feet of the house be represented as x
Let the number of houses be represented as y
Let the first point be P ( 1400 , 105)
Let the second point be Q ( 1500 , 183 )
Now , the slope of the equation is given by
Slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Slope m = ( 183 - 105 ) / 1500 - 1400
Slope m = 78 / 100
Slope m = 0.78
Now , the equation of line is y - y₁ = m ( x - x₁ )
Substituting the values in the equation , we get
y - 1400 = 0.78 ( x - 105 )
On simplifying the equation , we get
y - 1400 = 0.78x - 81.9
Adding 1400 on both sides of the equation , we get
y = 0.78x + 1318.1
Therefore , the value of y is 0.78x + 1318.1
Hence , the equation of line is 0.78x + 1318.1 and the price is $ 176,000
To learn more about equation of line click :
https://brainly.com/question/14861637
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Answer:
Step-by-step explanation:
b i think
Solve -2p + 10p = 7p for p.
Answers
Answer:
Step-by-step explanation:
-2x7+ 10x7
-14+70
70-14 ( there were more positives than negatives. so subtract the smaller number and you get)
56
no variable because it was replaced with 7.
The problem requires to show the work, and provide justification statements that are mathematically correct explaining the reasoning.
Answers
Answer:
Step-by-step explanation:
From the table you have points (-1, 3) and (2, 9)
general equation
y-y1 = m (x-x1)
the slope m= (y2-y1) / (x2-x1) = 9-3/ 2+1 = 6/3 =2
so the equation shhould be
y+1=2(x-3)
Sydney equation is wrong because her slope is wrong 1/2
Does anyone know the answer to 6X +18 = h (3X +9)
Answers
Solve the following equation for c.
ab + cd = e
(Sorry, this is all the info they gave me.)
Answers
Answer:
Step-by-step explanation:
ab + cd = e
cd = e - ab
d =(e - ab)/d
if the original quanity is 10 and the new quanity is 12, what is the percent increase
Answers
Answer:
+20%
Step-by-step explanation:
None
Answer:
Step-by-step explanation:
20%
What is the value of x?
X+4/9=3/4
Answers
Answer:
Answer
4.0/5
10
Americ
Ambitious
1.5K answers
627.6K people helped
x + 4/9= 3/4
subtract 4/9 from both sides
x= 3/4 - 4/9
change to common denominators
x= 27/36 - 16/36
subtract numerators only
x= 11/36
ANSWER: (A) 11/36
Hopes this helps :)
Answer:
Exact Form: x = 11 / 36
Decimal Form: x = 0.305555
Step-by-step explanation:
Increase £16470.45 by 3.5% by 2DP
Answers
Answer:
17,046.92 i think
Step-by-step explanation:
Help me please :) Please and thanks
Answers
Answer:
1661.9
Step-by-step explanation:
I HAVE A TIME LIMIT PLZ HELP
Read the hypothetical situation below and answer the question that follows. On Independence Day, Allison’s grandfather tells her a story about his experience in the Army. Allison is so moved by the story that she decides to enlist in the Army the next day. The above story is an example of a __________ moment inspiring an act of good __________.
A.
patriotic . . . citizenship
B.
patriotic . . . prejudiced
C.
stereotype . . . patriotism
D.
open-minded . . . equality
Answers
Answer:
is A
Step-by-step explanation:
Answer:
A. patriotic . . . citizenship
Step-by-step explanation:
Edge 2020 or Time4learning
Simplify the expression: *
5(-2n + 4) + 2(n + 3)
Answers
Answer:
26- 8n
Step-by-step explanation:
-10n + 20 + 2n + 6
-10n+2n +6 +20
-8n + 26
Best regards
Answer:
-8n+26
Step-by-step explanation:
Sales at an airport shop has increased by 25 transactions to a total of 400 transactions per day. What is the increased transaction percentage?
Answers
Answer:
6.66
Step-by-step explanation:
On a computer screen, PLS HELP ASAP!!!!!!!!!!!!
Jennifer just created a triangular design of a banner with vertices at A(-4,3), B(-1,5) and C(-1,2). She can use the computer software to perform transformations on this design.
Which sequence of two transformations could she perform so that the transformed vertices become A’ (4,-5) , B’(7,-7), and C’(7,-4) ?
Answers
Answer: D
Step-by-step explanation: reflecting about the line y=-1, followers by translating 8 units to the right
Gabe is analyzing the plane ticket prices over the years. Comparing the cost of a plane ticket this year to last year, ticket prices are 12% higer than they were last year. Create an expression that represents the difference between this year and last year
Answers
Answer:
The difference in prices is 0.12x where x is the last year’s price
Step-by-step explanation:
Here, we want to create an expression
Let the price last year be x
12% more this year mean;
x + 12% of x
= x + 0.12x = 1.12x
So the difference between this year and last year will be;
1.12x - x = 0.12x
Find m Of the function
Answers
Answer:
m=1
Step-by-step explanation:
slope formula is y=mx-b
whenever a variable is by itself, the coefficient is always 1
A walking path is being built along the diagonal of a
rectangular park. Determine the length of the path, to the
nearest metre.
A 135 m
B 97 m
C 66 m
D 58 m
Answers
Answer:
C
Step-by-step explanation:
BRAINLIEST PLEASE
a student purchased 7 binders for a total of $8.61. Write an equation that can be used to find the cost of each binder,n, in dollars. What is the cost ,in dollars, of each binder?
Answers
Answer:
$1.23
Step-by-step explanation:
divide 8.61 by 7 binders to get the final answer of $1.23
John says all of the factors for the number 28 are
1, 2, 3, 4, 7, 14, 28
But he is incorrect! Which number is not a factor of 28?
Answers
Answer:
3
Step-by-step explanation:
what is the surface area of a cube with a base edge of 8 mm
Answers
Answer:
8 mm
Step-by-step explanation:
A=3.84×10-4m²
The setup fee for a photo book is $35. The papwe is an additional charge of $0.80 per page. What is the greatest number of pages that a book can have if the total bill is to be less than $50?
Please help, thanks! ☺
Answers
Answer:
18 pages
Step-by-step explanation:
18 pages would cost $14.40 and the you add $35 for the setup fee. This makes the total $49.4 and no more pages can be added because it would cost too much.
Should’ve paid attention, anyone got an answer! Thank you
Answers
Answer:
4x^4Step-by-step explanation:
Hope this helps!! Please consider marking brainliest! Have a good one!!
Answer:
4x^4
Step-by-step explanation:
Hope this helps and have a nice day :)
please help meeeeeeeeeeee
Answers
Answer:
78°
Step-by-step explanation:
42+60=102
180-102=78
Answer:
Step-by-step explanation:
first find the final interior angle since we need it to find the exterior
60 + 42 = 102
180 - 102 = 78 degrees
then we just have to do 180 - 78 bc we have a straight line and straight lines are always 180 degrees
180 - 78 = 102 degrees
x = 102
you honestly could just take the 2 values you already know and add them and use that lol
hope this helps <3