Answer:
My emotional speech to you : Yolo UWU or you got this, I believe you can achieve great things, and you probs think hah no, but lOOk Me DeAd In thE EyE thrOuGh The scReen, HUnNy U GOt thIs, RePeAt It :)
Which system of linear equations has the ordered pair (15, – 25) as its solution?
x - 2y = 35 and 2x + y = 55
x-2y = -35 and 2x - y = 55
2x+y=5 and 2x + y = 55
2x+y=5 and 2x – y=55
Answer:
The solution to the system of equations be:
(x, y) = (15, -25)
Therefore, the fourth system of equations i.e. 2x+y=5 and 2x – y=55 has the ordered pair (15, – 25) as its solution.
Step-by-step explanation:
Let us solve and check the 4th system of equations
2x+y=5
2x – y=55
solving the system of equations
[tex]\begin{bmatrix}2x+y=5\\ 2x-y=55\end{bmatrix}[/tex]
subtracting
[tex]2x-y=55[/tex]
[tex]-[/tex]
[tex]\underline{2x+y=5}[/tex]
[tex]-2y=50[/tex]
so the system of equations becomes
[tex]\begin{bmatrix}2x+y=5\\ -2y=50\end{bmatrix}[/tex]
solve -2y = 50
[tex]-2y=50[/tex]
Divide both sides by -2
[tex]\frac{-2y}{-2}=\frac{50}{-2}[/tex]
[tex]y=-25[/tex]
[tex]\mathrm{For\:}2x+y=5\mathrm{\:plug\:in\:}y=-25[/tex]
[tex]2x-25=5[/tex]
Add 25 to both sides
[tex]2x-25+25=5+25[/tex]
Simplify
[tex]2x=30[/tex]
Divide both sides by 2
[tex]\frac{2x}{2}=\frac{30}{2}[/tex]
simplify
[tex]x=15[/tex]
Thus, the solution to the system of equations be:
(x, y) = (15, -25)
Therefore, the fourth system of equations i.e. 2x+y=5 and 2x – y=55 has the ordered pair (15, – 25) as its solution.
Help me with this pls
Answer:
x=65
Step-by-step explanation:
90 degree angle
90-25= 65
It is a straight line with angle measures of 90°, x° and 25° opposite to the angle marked 180°.
Hence, their sum is 180°.
➛[tex]90 \degree + x + 25 \degree = 180 \degree[/tex]
➛[tex]115 \degree + x = 180 \degree[/tex]
Then,
➛[tex] x = 180 \degree - 115 \degree[/tex]
➛[tex]x = 65 \degree[/tex]
Hence:-The measure of the angle will be 65° (Ans)
~[tex] \large{ \blue{ \sf{FadedElla}}}[/tex]
1 one gets it right will get crown plz hurry!!!!!!!!!!!!!!!!
Thirty pounds of grass seed will cover One-third of an acre. Which unit rate describes this situation? 10 pounds per acre 40 pounds per acre 90 pounds per acre 120 pounds per acre
Step-by-step explanation:
As always, the "unit rate" can be written two ways. You have not specified which one you want.
.. (30 lb)/(1/3 ac) = 90 lb/ac
.. (1/3 ac)/(30 lb) = (1/90) ac/lb
Answer:
90 pounds per arce
Step-by-step explanation: cause he said
The cost of polishing 35 identical wooden cubical boxes at the rate of rs. 20 per sq. cm is rs. 1,51,200. Find the edge of each cubical box
Answer: 6 cm
Step-by-step explanation:
Total surface area of cubical box = [tex]6a^2[/tex] , a= edge length of cube (i)
As per given ,
Total surface area of one box = [tex]\dfrac{\text{Cost of polishing}}{\text{Rate} \times\text{Number of boxes}}[/tex]
[tex]=\dfrac{151200}{20\times35}\\\\=\dfrac{151200}{700}\\\\= 216\ sq. cm[/tex] (ii)
Now from (i) and (ii) ,
[tex]6a^2 = 216\\\\\Rightarrow\ a^2= 36\\\\\Rightarrow\ a= 6 \text{ [By taking square root on both sides]}[/tex]
Hence, the edge of each cubical box = 6 cm.
WILL mark brainliest
Answer:
do u have to find the pattern?
Step-by-step explanation:
I neeeeeedddddd helppppp
Answer:
yes
Step-by-step explanation:
They both have a 25 degree angle, and the second one is just the first one but put on the page at a different angle
What’s the value of x in this equation???? Thank u!
Answer:
x = 9
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
50° is an exterior angle of the triangle, thus
38 + 4x - 24 = 50 , that is
14 + 4x = 50 ( subtract 14 from both sides )
4x = 36 ( divide both sides by 4 )
x = 9
Answer:
[tex]\huge\boxed{\sf x = 9}[/tex]
Step-by-step explanation:
The measure of the exterior angle is equal to the sum of non-adjacent interior angles.
So,
50 = 38 + 4x - 24
50 = 4x + 14
Subtract 14 to both sides
50 - 14 = 4x
36 = 4x
Divide 4 to both sides
36 / 4 = x
x = 9
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Find the slope:
(3,-5) and (-7,-6)
the slope is 0.1 or one tenth as a fraction.
slope equation:
change in Y divided by change in X
**underlined numbers are x values and bold numbers are y values**
(3,-5) and (-7, -6)
our two Y values looking at the coordinates are -5 and -6, since coordinates are (x,y)
our two X values are 3 and -7
now plug these into the equation:
-5 - (-6)
------------
3 - (-7)
**PAY ATTENTION TO THE SIGNS**
now the numerator is -5+6 which is 1
and the denominator is 3+7 which is 10
that makes 1/10 as a fraction -your slope
simplify it and you have:
slope = 0.1 or 1/10
i hope this helps!!
A bacteria sample can be modeled by the function f(x) - 350(1.20) which gives the number of bacteria in the sample at the end of x days. Which statement is the best interpretation of one of the values in this function? 11) A) The initial number of bacteria is 350. B) The number of bacteria at the end of one day is 350. 9 The initial number of bacteria decreases at a rate of 20% D) The number of bacteria increases at a rate of 120% each day.
Answer: A) The initial number of bacteria is 350.
Step-by-step explanation:
Exponential growth equation: [tex]f(x)=A(1+r)^x[/tex] , where A=Initial value, r= growth rate. (i)
Given: A bacteria sample can be modeled by the function [tex]f(x) = 350(1.20)[/tex]which gives the number of bacteria in the sample at the end of x days.
Here, [tex]f(x)=350(1+0.20)[/tex]
Compare this equation to (i) , we get A = 350 and r= 0.20 = 20% (growth rate)
So, the best interpretation of one of the values in this function are:
A) The initial number of bacteria is 350.
Answer:
A
Step-by-step explanation:
I did the prep
what is yhe rotational symmetry of a regular pentagon base pyramid?
Answer:
C5, [5]+, (55)
i think this is it but i might be wrong
Step-by-step explanation:
The product of 3.4×10 to the -14th power and 1.8×10 to the 28th power
Answer:
6.12x10¹⁴
Step-by-step explanation:
...........................
Answer:
A
Step-by-step explanation:
3.4x10^-14 x 1.8x10^28
3.4x1.8 x 10^-14+28
6.12 x 10^14
what is the area of the shape
Answer:
A= 18
Step-by-step explanation:
To find the height, find the blocks inside the shape that is completely attached (they have to be in a straight vertical line). In this case, you can see that three vertical blocks in the middle of the shape is completely attached. That means your height is 3.
To find the width, look at the how many horizontal boxes make up the top. 6 block inside the shape corispond with 6 blocks on top of the shape, so the width is six.
Multiply 6 by 3 to get 18.
PLEASE HELP!!! PLEASE DONT ANSWER IF U DONT KNOW!
Answer:
x^2 - y^2) - (x^2 -3x +2)
Step-by-step explanation:
Answer:
-y to the second power + 3x-2
Step-by-step explanation:
Please mark brainlliest if you want.
y is inversely proportional to the square of x.
y = 8 when x = 3.5
8
Find the negative value of x when y= 8/9
Step-by-step explanation:
x²y = k, where k is a real constant.
When x = 3.5, y = 8.
=> (3.5)²(8) = k, k = 98.
When y = 8/9,
we have x²(8/9) = (98).
=> x² = 110.25
=> x = 10.5 or x = -10.5.
Since we want the negative value,
the answer is x = -10.5.
The required negative value of variable x when y = 8/9 is -10.5. To understand the calculations, check below.
Proportion:Important information:
y is inversely proportional to the square of x.y=8 when x=3.5.Using the given inverse proportional statement, we get
[tex]y\propto \dfrac{1}{x^2}[/tex]
[tex]y=\dfrac{k}{x^2}[/tex] ...(i)
Substitute [tex]x=3.5,y=8[/tex].
[tex]8=\dfrac{k}{3.5^2}[/tex]
[tex]8=\dfrac{k}{12.25}[/tex]
[tex]8\times 12.25=k[/tex]
[tex]98=k[/tex]
Substitute [tex]k=98[/tex] in (i).
[tex]y=\dfrac{98}{x^2}[/tex]
Substitute [tex]y=\dfrac{8}{9}[/tex].
[tex]\dfrac{8}{9}=\dfrac{98}{x^2}[/tex]
[tex]x^2=98\times \dfrac{9}{8}[/tex]
[tex]x^2=110.25[/tex]
[tex]x=\pm \sqrt{110.25}[/tex]
[tex]x=\pm 10.5[/tex]
We need only negative value.
[tex]x=-10.5[/tex]
Therefore, the required value of variable x is -10.5.
Find out more about 'Proportion' here:
https://brainly.com/question/15179946
I don't understand how to find the negative. Some of these are wrong and just need help finding my errors
Answer:
-5pi/4
Step-by-step explanation:
Find X- and y- intercepts of the graph of each equation.
Answer:
1.) -4 and 12
y-intercept: -4
x-intercept: 12
2.) -11 and 11
y-intercept: -11
x-intercept: 11
Step-by-step explanation:
x - 3y = 12
0 - 3y = 12
-3y/-3 = 12/-3
y = -4 (y-intercept)
x - 3y = 12
x -3(0) = 12
x = 12 (x-intercept)
2x - 2y = 22
2(0) - 2y = 22
-2y = 22
-2y/-2 = 22/-2
y = -11 (y-intercept)
2x - 2y = 22
2x - 2(0) = 22
2x = 22
2x/2 = 22/2
x = 11 (x-intercept)
Select the function that's represented in the graph.
options:
A)
ƒ(x) = (x + 3)2 – 5
B)
ƒ(x) = 3(x + 3)2 – 5
C)
ƒ(x) = (x – 3)2 – 5
D)
ƒ(x) = 3(x – 3)2 – 5
Answer:
the answer is c
Step-by-step explanation:
because it mets up
an alloy is made by mixing metals A and B in the ratio 3:5
metal a costs £42 per kg
metal b costs £20 per kg
how much would it cost to make 400g of the alloy?
Answer:
11.3
Step-by-step explanation:
First solve how many grams of each mineral you need.
To do this use this equation
[tex]\frac{3}{5} =\frac{x}{y} ; x+y=400[/tex]
Solve the system of equations to get
x=150, y=250
Since there are 1000 grams in 1 kg then the amount of kg of each material you need will be
[tex]x=\frac{150}{1000}; y=\frac{250}{1000}[/tex]
So you need to 0.15 of a kg of mineral a and 0.25 kg of mineral b.
Multiply 0.15 by 42 to get the amount of money needed to buy mineral a.
0.15*42=6.3
Multiply 0.25 by 20 get the amount of money needed to buy mineral b.
0.25*20= 5
Add them to get the final amount
6.3+5=11.3
Let n be the number of couples dancing in a competition. If there are 5 organizers, which expression represents the total number of people involved in the competition?
The expression representing the total number of people involved in the competition is 2n + 5.
What are Algebraic Expressions?Algebraic expressions are defined as the statements in mathematics which consist of constants, coefficients of the variables and variables connecting with basic operations like addition, multiplication, subtraction, etc.
Algebraic equations are something with an algebraic expression equal to something. But in algebraic expressions, there will be no equal to sign.
There are basically three classes of algebraic expressions, namely, monomial, binomial and polynomial expressions.
Number of couple dancing in a competition = n
Number of people involving in a couple dance is 2.
Total number of people dancing as couple = 2n
Number of organizers in the competition = 5
Total number of people involved = 2n + 5
Hence 2n + 5 number of people are involved in the competition program.
To learn more about Algebraic Expressions, click on the link given below :
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Gina has 48 stickers. of the stickers have pictures of flowers. of the stickers have pictures of plants. The rest of the stickers have pictures of people. How many stickers have pictures of people?
Responses
A. 24 stickers
B. 12 stickers
C. 30 stickers
D. 18 stickers
Answer:
A
Step-by-step explanation:
The average cost per month of a 2-bedroom apartment in Grayson was $625 last year. This year, the average cost is $650. What is the percent increase from last year to this year? *
4%
25%
14%
3.8%
Answer:
4%
Step-by-step explanation:
4% percent of 625 is 25 and the price used to 635 and now its 650 which means there was a $25 increase which means 4% is correct
BRAINLIEST PLZ!!!
someone help me with my math homework?
Answer:
c
Step-by-step explanation:
Lydia found an apartment that she wants to rent. The rent is $715 per month and there is a security deposit of $355. To move in, Latisha must have first month's rent, last month's rent and the security deposit. How much does Lydia need to move in?
Answer:
$1785
Step-by-step explanation:
you have to multiply the monthly rent by 2 since she has to pay the first and last months rent and then add the $355 security deposit
Answer:
$1985
Step-by-step explanation:
715 x 2 = 1430
1430 +355 = $1985
We want to factor the following expression:
4x² - 9y
MY
Which pattern can we use to factor the expression?
U and V are either constant integers or single-variable expressions.
Pro
Choose 1 answer:
Pro
Tea
(U + V)? or (U – V)
e-(U+V)(U-V)
We can't use any of the patterns.
Answer:
The answer is B :
a number increased by eighteen
Answer:
can you explain a little bit more
Step-by-step explanation:
The line has been partitioned into three angles. Is there a triangle with these three angle measures?
Help plz plz I would appreciate it
Answer:
14
Step-by-step explanation:
As we can see BD is the median of the Triangle ABC
So it breaks into two equal parts
AD = 7
And CD = 7
So
AC = AD + CD
= 7 + 7
= 14
Hope it will help :)
Write an equation of a line that passes through the point (4,3) and is perpendicular to the graph of the equation y=−13x+4.
Answer:
An equation of a line that passes through the point (4,3) and is perpendicular to the graph of the equation will be:
[tex]y=\frac{1}{13}x+\frac{35}{13}[/tex]Step-by-step explanation:
We know that the slope-intercept form of the line equation is
[tex]y=mx+b[/tex]
where
m is the slopeb is the y-interceptGiven the line
y = -13x+4
comparing with the slope-intercept form of the line equation
The slope of the line = m = -13
We know that a line perpendicular to another line contains a slope that is the negative reciprocal of the slope of the other line, such as:
slope = m = -13
Thus, the slope of the the new perpendicular line = – 1/m = -1/-13 = 1/13
Using the point-slope form of the line equation
[tex]y-y_1=m\left(x-x_1\right)[/tex]
where
m is the slope of the line(x₁, y₁) is the pointsubstituting the values of the slope m = 1/13 and the point (4, 3)
[tex]y-y_1=m\left(x-x_1\right)[/tex]
[tex]y-3=\frac{1}{13}\left(x-4\right)[/tex]
Add 3 to both sides
[tex]y-3+3=\frac{1}{13}\left(x-4\right)+3[/tex]
[tex]y=\frac{1}{13}x-\frac{4}{13}+3[/tex]
[tex]y=\frac{1}{13}x+\frac{35}{13}[/tex]
Therefore, an equation of a line that passes through the point (4,3) and is perpendicular to the graph of the equation will be:
[tex]y=\frac{1}{13}x+\frac{35}{13}[/tex]Name the property. 7+(11+10)=(7+11)+10
Answer:
associative
Step-by-step explanation:
u switched parentheses
Need done quickly pls help