Prove that the midpoints of the sides of an equilateral triangle are the vertices of another equilateral triangle.
Answer:
Finding the vertices of the triangle from midpoints short cut If (x 1, y 1) (x 2, y 2) and (x 3, y 3) are the mid-points of the sides of a triangle, we may use the vertices of the triangle by using the formula given below. A (x 1 + x 3 - x 2, y 1 + y 3 - y 2) B (x 1 + x 2 - x 3, y 1 + y 2 - y 3)
Step-by-step explanation:
Item 3
Graph y= –73x+2.
Plz Help 100 points
please show work for 16,17,18
Answer:
ye im new to this but heres me doing it on graph paper
Mrs. Galicia sells online math and reading games. His revenue for each game (in dollars) is modeled by the given equations, where x is the number of days since the games went on sale.
Math Game: M(d)=2x^2+8x+2
Reading Game: R(d)=3x+5
Solve the system algebraically. After how many days is the revenue for each game the same? Show your work and explain your answer.
Graph this system to show the solutions. Label each axis appropriately.
Answer:
In the middle of a day
Step-by-step explanation:
1) Make it an actual equation
[tex]3x+5=2x^{2} +8x+2[/tex]
2) Cancel integers
[tex]3x + 3 = 2x^{2} + 8x[/tex]
3) Get rid of no exponent variables
[tex]0 = 2x^{2} + 5x - 3[/tex]
4) Factor :D
[tex](2x - 1)(x+3)[/tex]
5) Solve
2x - 1 = 0
x + 3 = 0
They will meet at -3 days (Which doesn't exist!!!) and 1/2 a day.
---------------------
I didn't use graphing, nor did I double check my work but I'm quite sure its correct, i'll edit this answer with a graph for brainliest tho :>
-----------------
Edit: Eh i'll add a graph cause i'm nice ;-;
A paint mixture is made up of 3/20 red paint and 9/20 blue paint, and the rest is white paint. What fraction of the mixture is white paint?
The paint is sold in 5-litre containers. How many litres of red paint are needed for each container?
How many litres of blue paint are needed for each container?
Answer:
2/5
3/4
2 1/4
Step-by-step explanation:
red paint: 3/20
blue paint: 9/20
white paint: x
What fraction of the mixture is white paint?
x + 3/20 + 9/20 = 1
x + 12/20 = 20/20
x = 8/20 = 2/5
2/5 of the paint mixture is white paint.
The paint is sold in 5-litre containers. How many litres of red paint are needed for each container?
3/20 × 5 litre = 3/4 litre
Each container needs 3/4 liter of red paint.
How many litres of blue paint are needed for each container?
9/20 × 5 litres = 9/4 litres = 2 1/4 litres
Each container needs 2 1/4 liter of blue paint.
(2a−1/3)÷b/15 when a=−45 and b=−2.25. HELPP
Answer:
Substitute the a and b values into the expression.
(2x(-2.25))÷(-45)/15
-4.5÷(-3)
1.5
:)
evaluate the expression when x =1/4 and y = 1/2 PLZ HELP
Answer:
Where's the expression?
Step-by-step explanation:
seven less than the difference of a number and three.
Answer:
I think the number is 10.
Step-by-step explanation:
Seven less than a number is x - 7 (If x is the number). Then x - 7 = 3 so, x = 3+7 = 10.
Hoped I helped.
what is the Y intercept in the linear equation y equals 1/10 x - 2
1/10x-2 = y
1/10(0)-2 = y
x = -2
(-2, 0)
本题已由中国数学会官方解答（现有会员：3人）
Write 104 without an exponent.
Answer:
It doesn't have an exponent.
Find the percent decrease. Round to the nearest percent. From 88°F to 70°F
Answer:
18%
Step-by-step explanation:
the answer is 18 percent because 88-18 will make it to 70
Answer:
Step-by-step explanation:
-20.45%
Write –76.82 as a mixed number. quick please
Answer:
-76 41/50
Thank me later! :)
Step-by-step explanation:
step by step
Are 7(c + 5) − 7 and 7c + 28 equivalent expressions?
Answer:
Yes
Step-by-step explanation:
c+5
× 7
--------------
7c+35
= 7c+35-7
=7c+28
What are the coordinates of the vertex of the graph of the function y=-3x2-12x +3?
Answer:
(-2, 15)
Step-by-step explanation:
y = -3x^2 - 12x + 3
a = -3
b = -12
c = 3
the formula for finding the x value of the vertex is -b/2a
so if we plug in the values into the equation we get
-(-12)/2(-3) = 12/-6 = -2
so our x value is -2
to find our y value we have to plug in -2 for every x we see in the original equation
so -3(-2)^2 - 12(-2) + 3 = -12 + 24 + 3 = 15
15 is our y value
so the vertex is (-2, 15)
HELPPPPP
Sophia needs to earn at least $1,800 each month to cover her living expenses. What is the minimum amount she
needs to sell in order to earn at least $1,800 if she earns a 10,75% commission on everything she sells? Round to the
nearest dollar
Answer:
16745
Step-by-step explanation:
Answer:
$16745
Step-by-step explanation:
1800/10.75%
$16744.19 (exact)
What is the Slope of the equation x = -4
A -4
B Undefined
C 0
D 1
Answer:
It's undefined, because if you graph it, the line wouldn't even touch the y-axis. Instead it will be a vertical line that passes through -4 on the x-axis.
Hope this helps you :)
Evaluate. (a − 2b)^3when a when a = -2 and b= -1/2 Enter your answer in the box.
Step-by-step explanation:
( a - 2b)^3. ..... replace a and b with the given values
( -2 - 2(-1/2))³
( -2 +1)³
(-1)³
-1
Graph the linear equation y=−3 .
Answer:
I can't graph the linear equation because I don't know what x is.
There needs to be and x and a y coordinate.
Without writing the equation (y-4)2 = 9(x-4) in the standard form, state whether the graph of this equation is a parabola,circle, ellipse, or hyperbola.
A. parabola
B. ellipse
C. hyperbola
D. circle
9514 1404 393
Answer:
A. parabola
Step-by-step explanation:
The curves ellipse, circle, and hyperbola are formed by a relation between the squares of the variables. Here, the y-variable is squared, but the x-variable is not. This equation describes a parabola.
_____
Additional comments
Its vertex is at (4, 4) and it is compressed horizontally by a factor of 9.
__
The hyperbola equation is the difference of squares; the circle and ellipse equations involve the sum of squares. If the variable coefficients are the same, then the sum of squares equation will describe a circle; an ellipse otherwise.
Which number below is its own reciprocal?
a. 2
b. 1/4
c. 3
d. 1
Answer:
B
Hope it helps!
Inia borrowed $1000 from a bank. The bank charged a 10% interest. How much interest would Inia pay to the bank? A. $1100 B. $900 B. $100 D. $10
Answer:
An $100 interest.
Step-by-step explanation:
10% of $1000 is $100.
In total, she'd have to pay $1100.
Just a cheerful teen willing to help,
wishing you a splendiferous day,
stay salty...
Find the indicated sum.
Answer:
-5
Step-by-step explanation:
The starting point is at 1 and the stopping is at 5(if you want to know where to find these, look at the image attached).
For i=1, we have i-4, which would be 1 - 4, or -3.
For i=2, we have i-4, which would be 2 - 4, or -2.
For i=3, we have i-4, which would be 3 - 4, or -1.
For i=4, we have i-4, which would be 4 - 4, or 0.
For i=5, we have i-4, which would be 5 - 4, or 1.
We would add these 5 values:
-3 + (-2) + (-1) + 0 + 1
This gives us -5
Joe runs 4 miles in 30 minutes. At the same rate, how many minutes would he take to run 10 miles?
Answer:
It would take him 75 minutes or one hour and 15 minutes
Step-by-step explanation:
[] We can set up a ratio and then cross multiply to find our answer
-> Let x be the minutes it takes him to run 10 miles
[] First, we will set up an equation
-> Keeping in mind that miles must be either on the top or the bottom, same goes for minutes, as units must be kept consistent.
[tex]\frac{4miles}{30minutes} =\frac{10miles}{x}[/tex]
[] Then, we will cross multiply
4x = 300
-> Divide both sides of the equation by 4
x = 75 minutes
Have a nice day!
Note: I know this is a very late answer. I just answered this problem elsewhere, and your question popped up as recommended.
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
15. (02.05 LC) Which of the following statements best describes the effect of replacing the graph of f(x) with the graph of f(x) - 3? (1 point) The graph shifts 3 units up. The graph shifts 3 units down. The graph shifts 3 units left. 3 . The graph shifts 3 units right. 1-15 0
Will give brainliest
Answer:
the graph shifts 3 units down
Explanation:
to move a graph up c units, add c to the whole function
so basically what you did is you subtracted 3 from the whole function the whole graph shifts 3 units down
I hope it helps.
please help and show work will makr as brainliset
Step-by-step explanation:
[tex]5x + 2y = 8[/tex]
[tex]2y = - 5x + 8[/tex]
[tex]y = \frac{ - 5x}{2} + \frac{8}{2} [/tex]
[tex]y = \frac{ - 5x}{2} + 4[/tex]
Option → A
Evaluate the expression 8 –
5xy^3. for x = 3 and y = – 2.
A)278
B)-112
C)-72
D)128
Answer:
D) 128
Step-by-step explanation:
Because we will be replacing the variables with numbers we have to that we will have to do the exponent first because of PEMDAS.
[tex]8-5(3)(-2)^3[/tex]
[tex]8-5(3)(-8)[/tex]
[tex]8-15(-8)[/tex]
[tex]8-(-120)[/tex]
[tex]8+120=128[/tex]
100 points answer ASAP
A line contains the points (0,8) and (1.-2) What is the slope of the line in simplified form? Enter your answer in the box
Slope = change in y / change in x
Slope = (-2 -8) / (1-0)
Slope = -10/1
Slope = -10
Answer: slope = -10
20 points, not too hard! select all expressions that are equivalent to 9k(6k + 3r).
a - 15k + 12r
b - 54k + 27r
c - 6(3k + 0r)
d - 3(18k + 9r)
Answer:
please check your question. I think there is not a 'k' letter after number 9
[tex]\frac{8r-8s}{2r^{2} -2rs} } + \frac{3r^{2} }{rs-r}[/tex]
[tex] = \frac{4s - 4 + 3 {r}^{2} }{r \: s \: - \: r } \\ \\ \\ \\ hope \: \: it \: \: helps[/tex]
Please help me on this problem and explain it step by step on how I could get the answer in order to get marked as brainliest!
Answer:
to find the speed per min all i did was divide 450 feet by 60 mins b/c that's how many mins are in an hour and that give me 7.5 so that would be 7.5 feet per min
Step-by-step explanation:
Answer:
589.6 feet per minute
Step-by-step explanation:
half an hour is 30 minutes, you would then divide 450/30=15 which that total will be your speed or mph, then you multiply 88*15=589.6
