Answer:
B.9
Step-by-step explanation:
What I did is I used ratio.
20:12
15:X
Cross multiply:15x12
Answer:180
The answer you get divided by 20.
180/20=9.
Answer:
B
Step-by-step explanation:
Given y varies directly as x, then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition when x = 20, y = 12, then
12 = 20k ( divide both sides by 20 )
k = [tex]\frac{12}{20}[/tex] = [tex]\frac{3}{5}[/tex]
y = [tex]\frac{3}{5}[/tex] x ← equation of variation
When x = 15, then
y = [tex]\frac{3}{5}[/tex] × 15 = 9
what is the coefficient of -2x+8=10
Step-by-step explanation:
Let's solve your equation step-by-step.
−2x+8=10
Step 1: Subtract 8 from both sides.
−2x+8−8=10−8
−2x=2
Step 2: Divide both sides by -2.
−2x−2=2−2
x=−1
Answer:
Answer:
-2
Step-by-step explanation:
The coefficient of an equation or expression is any constant that precedes a variable. So, in this case, the only variable is x, so the coefficient is the preceding number, -2.
please help! BRAINLIEST to correct answer!
Answer:
A
Step-by-step explanation:
u can just test them out
Answer:
A. y = 2[tex](x - 2)^{2}[/tex] + 5
Step-by-step explanation:
positive 2 because the parabola faces upwards, and + 5 because it's vertex is places at (2,5)
Please, i need help on how to solve problems like these. I dont understand and i wasnt in class when they taught it to us. PLzzzz.Will make it the brainiest if its corrected and explaining how to solve problems like these.
Answer:
x = 20
Step-by-step explanation:
You can use Pythagorean theorem which is [tex]a^2 + b^2 = c^2[/tex]
a = 12
b = 16
and c would be x.
12^2 + 16^2 = c^2
144 + 256 = c^2
400 = c^2
square root
c = 20 or x = 20
In order to join gymnastics after school, there is $75 on-time fee and $30 monthly fee. Which slope-intercept from equation models this situation
A. Y=30x + 20
B. Y=75x + 30
C. Y=30x + 75
D. Y= 30x
What is the value of x?
A=2
B=4
C=5.5
D.7
Identify the domain of the function.
Answer:
Step-by-step explanation:
domain represents the numbers at the x endpoints of a graph.
on the graph we see that on the left, the line ends when x is -4
on the right, the line ends when x is 4
the domain is
-4, 4
but notice how on the left there is an open circle
this will be written with a parentheses
( -4, 4
and notice how on the right there is a closed circle
this will be written with a bracket
(-4, 4]
so the answer is C
determine the value of x , (5)(x)=0
Answer:
x=0
Step-by-step explanation:
The parenthesis mean that it's multiplication, so it might be easier to convert that to: 5 · x = 0. We then know that anything times zero equals zero, so 5 · 0 = 0! I hope this helps! :)
.....................................................
Whoever solves this will get BRAINLIEST answer!!! Please help me out!
Answer:
x+x+x=180
3x=180
x=180/3
x=60
..What is the sum.. please help me and dont guess on this is important (will give braniliest) Please help ;((.
Answer:
-2 3 / 7 is the answer to this question
Audrey bought a refrigerator for $266 that was originally priced at $665. What percentage is the discount?
Answer:
40.6%
Step-by-step explanation:
discount percentage:
x/y*100
266/655 *100 which is 40.6%
Hope this helps plz hit the crown :D
SOMEONE PLEASE ANSWER
the equation is 7x-3 over 9 > 8-2x
Answer:
solving the inequality we get [tex]\mathbf{x\geq 3}[/tex]
The graph is attached below.
Option C is correct option.
Step-by-step explanation:
We need to solve the inequality [tex]\frac{7x-3}{9}\geq 8-2x[/tex]
First we will solve the inequality to find value of x
Solving:
[tex]\frac{7x-3}{9}\geq 8-2x[/tex]
Step 1: Multiply both sides by 9
[tex]9(\frac{7x-3}{9})\geq 9(8-2x)\\7x-3\geq 72-18x[/tex]
Step 2: Adding 3 on both sides
[tex]7x-3+3\geq 72-18x+3\\7x\geq 75x-18x[/tex]
Step 3: Add 18x on both sides
[tex]7x+18x\geq 75-+18x\\25x\geq 75[/tex]
Step 4: Divide both sides by 25
[tex]\frac{25x}{25}\geq \frac{75}{25}\\x\geq 3[/tex]
So, solving the inequality we get [tex]\mathbf{x\geq 3}[/tex]
The graph is attached below.
Option C is correct option.
1.6y+y-4/15y+1 1/6y=2 1/3
1.6y+y-4/15y+7/6y=21/3
We move all terms to the left:
1.6y+y-4/15y+7/6y-(21/3)=0
Domain of the equation: 15y!=0
y!=0/15
y!=0
y∈R
Domain of the equation: 6y!=0
y!=0/6
y!=0
y∈R
We add all the numbers together, and all the variables
1.6y+y-4/15y+7/6y-7=0
We add all the numbers together, and all the variables
2.6y-4/15y+7/6y-7=0
We calculate fractions
2.6y+(-24y)/90y^2+105y/90y^2-7=0
We multiply all the terms by the denominator
(2.6y)*90y^2+(-24y)+105y-7*90y^2=0
We add all the numbers together, and all the variables
(+2.6y)*90y^2+(-24y)+105y-7*90y^2=0
We add all the numbers together, and all the variables
105y+(+2.6y)*90y^2+(-24y)-7*90y^2=0
Wy multiply elements
-630y^2+105y+(+2.6y)*90y^2+(-24y)=0
We get rid of parentheses
-630y^2+105y+(+2.6y)*90y^2-24y=0
We add all the numbers together, and all the variables
-630y^2+81y+(+2.6y)*90y^2=0
Hoped this helped :)
Please help i will mark braniliest and 30 points
If you solve the inequalty 2x < 14, the solution set is x < 7. Graph x < 7 on a number line. Which one of the listed values of x is included in x < 7
A) x=8
B) x = 7
C) x = 12
D) x= -8
Answer:
D) x = -8
Step-by-step explanation:
All the values less than 7 are included in the number line. The graph on number line is shown in figure attached. In the options given, all values in Option A, B and C are greater than 7 so these cannot be included.
What's the answer to this?
Answer:
3 the answer is 3
Step-by-step explanation:
the math team has 11 boys 10 girls and 1 coach. What is the ratio of coach to students?
Emma's sister is nine years older
than Emma. Their combined ages
add up to 49. How old is Emma?
(The answer isn’t 40 bc it say that her sister is 9 years OLDER then Emma) pls help
Answer:20 I believe
Step-by-step explanation:
Answer:
yeah it should be 20 they're correct
{(0, 1), (1, 4), (2, 5), (3, 7)}
not a function or function
Answer:
It's a function
Step-by-step explanation:
Katie can buy 2 lb of apples for $7. What is the unit rate for the apples?
Answer:
$3.50 per lb of apples
Step-by-step explanation:
7/2 = 3.5
How many hours until the charges for each company will be equal and what is that charge
Answer:
25 hours, charge= 800
Step-by-step explanation:
300 + 20x = 500 + 12x
8x = 200
x = 25
300 + 20(25)
300+500 = 800
500 + 12(25)
500 + 300 = 800
Matt can walk 500 m from his home on King Street, and then 900m along Queen Street to go to his school. He can also walk across a diagonally across a park from his home to his school. Assuming King Street and Queen Street meet at right angles, how far does he walk across the park to go to school?
Answer:
He walks 1030 meters if he walks across the park.
Step-by-step explanation:
In order to solve this question we will need to know that [tex]c^{2} = a^{2} + b^{2}[/tex] (were c is the length of the hypotenuse (the diagonal line) of a right angle triangle, and a and b are the legs (the sides that form a right angle). So them means that.....
Let "c" be the distance he will need to walk if he was going to go through the park
Let "a" be the distance he walks on King Street
Let "b " be the distance he walks on Queen Street, then.....
[tex]c^{2} = a^{2} + b^{2}[/tex]
[tex]c = \sqrt{a^{2} + b^{2} }[/tex]
(Now plug in the values of a and b and get.....)
c = [tex]\sqrt{500^{2} + 900^{2} }[/tex]
c = [tex]\sqrt{1060000 }[/tex]
c = 1029.563014............
So I would assume that you have to round to the nearest meter. And as a result we get 1030 meter.
The product of twice a number and five is the same as the difference of nine times the number and 7/4
Answer:
36
hope this helps
Step-by-step explanation:
Which ordered pair represents a reflection of the point (-3,5) across the y-axis?
Answer:
-5,6
Step-by-step explanation:
YO MOM ZZZZZZZZZZZZZZZZP
#3, #19, and #16 please!!
What is the equation of the line that has a slope of 1/2 and contains the points 0,3?show work please
Answer:
Step-by-step explanation:
y - 3 = 1/2(x - 0)
y - 3 = 1/2x - 0
y = 1/2x + 3
I can’t understand what the question is asking me pls help
Answer: 3/4
Step-by-step explanation:
28 members in all - 12 boys = 16 girls
12/16 = 3/4
Solve 4x + 8y = 16 for x.
O A. x=-8y + 4
O B. x= -2y+ 16
O C. x= -2y+ 4
D. X = 8y + 16
4x + 8y = 16
4x = 16 - 8y
4x = 4 (4 - 2y)
x = 4( 4 - 2y)/4
X = 4 - 2y
X = -2y + 4
What is
y
+
3
=
7
(
x
−
2
)
y+3=7(x−2)y, plus, 3, equals, 7, left parenthesis, x, minus, 2, right parenthesis written in standard form?
Choose 1 answer:
The standard form of the given expression is 7x - y = 17
Equation of a line in standard formThe equation of line in standard form is expressed as Ax + By = C
Given the equation
y + 3 = 7(x - 2)
Expand
y + 3 = 7x - 14
y -7x = -14 - 3
-7x + y = - 17
7x - y = 17
Hence the standard form of the given expression is 7x - y = 17
Learn more on standard form of equation here: https://brainly.com/question/187506
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help with these equations please!
tell weather each equation has one solution , zero solution or infinte solutions really easy : )
Answer:
several different solutions,