Answer:
y = 2, x = -1
Step-by-step explanation:
2y - 5x = 9
2y = 9+5x
y = (9+5x) /2
4y + 3x = 5
4((9+5x) /2) + 3x = 5
13x + 18 = 5
13x = -13
x = -1
y = (9+5x) /2
y = (9+5(-1)) /2
y = 2
Answer:
x = -1, y = 2
Step-by-step explanation:
2y - 5x = 9
4y + 3x = 5
eliminate one of the variables by multiplying the equations and then adding them together.
3(2y - 5x = 9)
5(4y + 3x = 5)
6y - 15x = 27
20y + 15x = 25
26y = 52
y = 2
now input the value of y into one of the original equations to find x.
8 + 3x = 5
8-5 = 3
x = -1
When I think of a number, double it, then add 7, I get 25. What number did I think of? ( Hint: Let the number be x)o
Hey there!
The answer is [tex]9[/tex]
We will start by forming an equation to solve this.
So we are starting with a number, [tex]x[/tex], then doubling it and adding [tex]7[/tex], which gives us 25.
So:
[tex]2x+7=25[/tex]
Now we solve this equation:
[tex]2x+7=25[/tex]
[tex]2x=18[/tex]
[tex]x=9[/tex]
Have a super awesome day!
Answer:
X = 9
Step-by-step explanation:
If you take 9, then double it, you get 18. 9+9 = 18. Then, you would add 7. 18 plus 7 is 25.
Hence, the answer to this problem is 9.
8 is 80% of what number?
Answer: 10
Step-by-step explanation:
80/100 of 10
0.8 × 10 = 8
8 is 80% of 10
A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to calculate a percentage of a number, we should divide it by its entirety and then multiply it by 100.
To find a number such that, it's 80% is 8.
Let the number be x
80%x =8
This forms an equation in one variable which can be solved by transposition.
[tex]80x/100=8[/tex]
On multiplying 100 both sides,
[tex]80x=800[/tex]
On dividing 80 both sides,
x=10
Thus, 80% of 10 is 8.
Learn more about percentage, here:
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. A class trip is being planned. For one option, each student will pay $630. This includes two meals a day and accommodation for the 9 day trip. The other option offers three meals a day and accommodation for the 9days. This second option costs $720. What is the cost per meal? What is the cost per day for accommodation?
Pleaseee answer correctly !!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!
Answer:
TWU is congruent to WUV
Step-by-step explanation:
A game show contestant cannot spend more than $100 on $0.79 cans of beans and $3.59 boxes of cereal. Which inequality represents the situation, where b is the number of cans of beans and c is the number of boxes of cereal?
Answer:
i believe it would be 0.79b + 3.59c [tex]\leq[/tex] 100
Step-by-step explanation:
the price of the number of cans of beans added to the number of boxes of cereal must be less than or equal to $100
0.79b represents the price of the beans multiplied by the amount of cans the contestant buys, and 3.59c represents the price of the cereal multiplied by the amount of boxes the contestant buys
will someone help me work through this problem, please
Step-by-step explanation:
Radius (r) = 2 ft
V = 4/3 × 22/7 × (2)³
= 4/3 × 22/7 × 8
= 33.52 ft³
LMNP is rotated 180° clockwise around the origin.
Answer:
The correct answer is B
Step-by-step explanation:
-3,-4
Coordinates of M are (-3, -4) as LMNP rotates 180° clockwise.
What is clockwise rotation?
" Clockwise rotation means when any object is moving in the direction of hands of clock."
According to the question,
As per the diagram ,
Coordinates of M are ( 3, 4)
Rotation of a point through 180° about the origin when a point M( x, y) is rotated about the origin through 180° in anticlockwise or clockwise direction, it takes the new coordinates ( -x ,-y).
Therefore , coordinates of M are ( -3, -4).
Hence, coordinates of M are (-3, -4) as LMNP rotates 180° clockwise.
Learn more about clockwise rotation here
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what is the amplitude of y = 3[6(x-4)] - 5
'I hope my answer helps you'
Question: y = 3cos[6(x-4)] - 5
Answer: 3
Step-by-step explanation:
The reason for this is in order to find amplitude, it's always the number before "cos" or "sin". Also, the "[6(x-4)]" was just a distraction to throw you off
Here's a trick to find everything; amplitude, period, phase sift, etc.:
y = A sin(B(x + C)) + D
* amplitude is A
* period is 2π/B
* phase shift is C (positive is to the left)
* vertical shift is D
Mrs. Brown has a flower garden in the shape of a parallelogram.
The length of the base of the garden is 9.5 feet and the height is
4.2 feet. What is the area of the flower garden?
A 19.95 ft? B 27.4 f? C 30.7 ft? D 39.9 ft?
Area of flower garden is 39.9 square feet
Solution:
Given that, flower garden in the shape of a parallelogram
The length of the base of the garden is 9.5 feet and the height is 4.2 feet
To find the area of a parallelogram, multiply the base by the height
The formula for area of parallelogram is:
From given,
Base = 9.5 feet
Height = 4.2 feet
Substituting the values in formula,
Thus area of flower garden is 39.9 square feet
(hope this helps can i plz have brainlist :D hehe)
Answer:
D
Step-by-step explanation:
A=bh
A=(9.5)(4.2)
A=39.9 ft
The inverse of the function y = 22 +3 is y = –20 – 3
True
False
Answer:
true
Step-by-step explanation:
Answer:
False
Step-by-step explanation:
simplify the following 35÷32
plz help me out!!
Answer: 1.09375
Step-by-step explanation:
35÷32 is already in the simplest form. It can be written as 1.09375 in decimal form (rounded to 6 decimal places).
what is 4 + 5 square divided by 4
Answer:
0.75
Step-by-step explanation:
4 + 5=9
√(9)=3
3 ÷ 4 = 0.75
Which expression doesn't belong? Why does it not belong? A. 7.9x B. 7.9 · (-10) C. 7.9 + x D. - 79
Answer:
C. 7.9 + x
Step-by-step explanation:
Given - A. 7.9x B. 7.9 · (-10) C. 7.9 + x D. - 79
To find - Which expression doesn't belong? Why does it not belong?
Proof -
As given
A. 7.9x
B. 7.9·(-10)
C. 7.9 + x
D. -79
As we can see that Option A, B, D are the multiple of 7.9 but Option C is not the multiple of 7.9
So, Option C does not belong here.
∴ we get
The correct answer is - C. 7.9 + x
how to solve this 7/8 n=63
I need help with this fast i apericiatte it
Answer:
13/12
Step-by-step explanation:
Answer:
12/13
Step-by-step explanation:
remember it's adj/hyp so it would be 36/39. When simplified it becomes 12/13.
hard question!!!please help me !
there is english below
9514 1404 393
Answer:
t = ±√3
Step-by-step explanation:
The first equation tells us ...
x^2 +tx +2 = (x -h)(x -k)
x^2 +tx +2 = x^2 -(h+k)x +hk
Comparing coefficients, we have the equations ...
t=-(h+k)
2 = hk
__
The second equation tells us ...
2x^2 +mx +2m = 2(x -h/k)(x -k/h)
2x^2 +mx +2m = 2x^2 -2(h/k +k/h)x +2
Comparing coefficients, we have the equations ...
m = -2(h/k +k/h)
2m = 2
__
Dividing the last equation by 2 gives ...
m = 1
Using that in the third equation, we have ...
1 = -2(h/k +k/h) = -2(h^2 +k^2)/hk
Using hk = 2, this gives us ...
h^2 +k^2 = -1
From the first equation, we know ...
t^2 = (-(h+k))^2 = h^2 +2hk +k^2 = (h^2 +k^2) +2(hk)
Substituting the values for these terms, we have ...
t^2 = -1 + 2(2) = 3
t = ±√3
Possible values of t are √3 and -√3.
Find the sum of the interior angles of a dodecagon ( 12 sides ) show work for your answer!  ❤️
Answer:
Sum of Interior Angles = (Number of Sides -2) • 180 degrees
Sum = (12 -2) * 180
Sum of the interior angles = 1,800 degrees
Source: http://www.1728.org/polygon.htm
Step-by-step explanation:
how many 1/6 cups are in 1/2 cups?
Answer:
3/6 cups have a great day!!
The amount of a certain radioactive substance decreases by 15% every hour. If a sample starts with 100 g of this radioactive substance, which function represents the amount of radioactive substance left after x hours?
A- f(x)=100(0.15)^x
B- f(x)=100(0.85)^x
C- f(x)=100(1.15)^x
D-f(x)=100(1.85)^x
Answer:
A
Step-by-step explanation:
I took the test now that is what I got.
Hope this helps.
The function that represents the amount of radioactive substance left after {x} hours is : f(x)=100(0.15)ˣ.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that the amount of a certain radioactive substance decreases by 15% every hour. A sample starts with 100 g of this radioactive substance.
The function that represents the amount of radioactive substance left after {x} hours is -
f(x)=100(0.15)ˣ
Therefore, the function that represents the amount of radioactive substance left after {x} hours is : f(x)=100(0.15)ˣ.
To solve more questions on algebraic expressions, visit the link below-
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Steve has 10 biscuits in a tin.
There are 6 digestive and 4 chocolate biscuits.
Steve takes two biscuits at random from the tin.
Work out the probability that he chooses two different types of biscuits.
Answer:
31/90 is the prob.
Step-by-step explanation:
sorry if this is incorrect :9
ty for reading :9
12y = 8x + 29 write in slope intercept form and what is the solution? Show all your work plz help!
Factor completely: x2-4
Answer:
(x+2)(x-2)
Step-by-step explanation
x times x equals x^2, 2 times x equals 2x, -2 times x equals -2x, and 2 times -2 equals -4. If you add that up, the x-values cancel out, leaving the x^2 and the -4. (This explanation is working it backwards which is the easiest way IMO)
i need help with this
Step-by-step explanation:
1. 5 1/4 = 21/4
21/4 ÷ 3/4 = 7/4
2. 7 1/2= 15/2
15/2 ÷ 1/4 = 1.875
3. 3 2/5 = 17/5
17/5 ÷ 2/7 = 0.24
Solve this equation. Enter your answer in the box
- e- je= -24
e =
I
5x+2y =3
3x+2y=5
(1,4)
(-1,4)
(4,1)
Which one is it
Answer:
it would be -1, 4
-1 x 5 = -5 and 2 x 4 = 8 so -5 + 8 = 3
-1 x 3 = -3 and 2 x 4 = 8 so -3 + 8 = 5
ralph and edie each solved the equation (x-7)^2 - 100 = 0. ralph says the correct answer is x= -3. who is correct? how do you know?
plz help me math doesnt like me
Answer:
hello
Step-by-step explanation:
i think diameter is 13 cm
but radius is equal to 13/2=6,5cm
hope it helps
have a nice day
bye
BRAINLIEST!! PLS HELP
solve 4(3 - 1x)
Answer:
− 4x + 12
ENJOY...
Step-by-step explanation:
Answer:
12 - 4x
Step-by-step explanation:
Distribute the 4 to both terms within the parentheses:
4(3 - x)
4*3 - 4*x
12 - 4x
This is called the expanded form, while 4(3 - x) is called the factored form of this expression.
Hope this helps!! :)
Which of the following best describes how the y values are changing over each interval?
x y
1 2
2 4
3 8
4 16
5 32
They are increasing by 2 each time.
They are increasing by 4 each time.
They are being multiplied by 2 each time.
They are being multiplied by 4 each time.
Answer: They are being multiplied by 2 each time
Step-by-step explanation:
2x2=4 4x2=8 8x2=16 16x2=32
Answer:
They are being multiplied by 2 each time
Step-by-step explanation: hope it helps ^w^
Principal = $5000
Rate = 7.4%
Time = 8 years
Answer:
2,960.00
Step-by-step explanation:
5000x7.4x8=2,960.00
hope this helps
